chore: fmt

# Conflicts:
#	src/tools/mcp/factory.rs
#	src/tunnel/mod.rs

.gitignore

@@ -17,6 +17,8 @@ target/
 # Python
 __pycache__/
 *.pyc
+*.pyo
+*.pyd
 
 # Benchmark results (local runs, not committed)
 bench-results/
@@ -34,8 +36,5 @@ trace_*.json
 .claude/settings.local.json
 .worktrees/
 
-# Python cache
+# JetBrains IDE
-__pycache__/
+.idea
-*.pyc
-*.pyo
-*.pyd

channels-src/whatsapp/Cargo.lock

@@ -269,7 +269,7 @@ dependencies = [
 
 [[package]]
 name = "whatsapp-channel"
-version = "0.1.0"
+version = "0.2.0"
 dependencies = [
  "serde",
  "serde_json",

src/agent/dispatcher.rs

@@ -47,6 +47,15 @@ impl Agent {
         thread_id: Uuid,
         initial_messages: Vec<ChatMessage>,
     ) -> Result<AgenticLoopResult, Error> {
+        if let Some(ext_mgr) = self.deps.extension_manager.as_ref()
+            && let Err(e) = ext_mgr.ensure_nearai_companion_active_if_ready().await
+        {
+            tracing::debug!(
+                "Failed to auto-activate NEAR AI companion MCP before turn: {}",
+                e
+            );
+        }
+
         // Detect group chat from channel metadata (needed before loading system prompt)
         let is_group_chat = message
             .metadata

src/app.rs

@@ -449,6 +449,8 @@ impl AppBuilder {
 
         let mcp_session_manager = Arc::new(McpSessionManager::new());
         let mcp_process_manager = Arc::new(McpProcessManager::new());
+        let companion_mcp_server =
+            crate::tools::mcp::config::derive_nearai_companion_mcp_server(&self.config);
 
         // Create WASM tool runtime eagerly so extensions installed after startup
         // (e.g. via the web UI) can still be activated. The tools directory is only
@@ -526,6 +528,7 @@ impl AppBuilder {
             let mcp_sm = Arc::clone(&mcp_session_manager);
             let pm = Arc::clone(&mcp_process_manager);
             let owner_id = self.config.owner_id.clone();
+            let companion_mcp_server = companion_mcp_server.clone();
             async move {
                 let servers_result = if let Some(ref d) = db {
                     load_mcp_servers_from_db(d.as_ref(), &owner_id).await
@@ -533,7 +536,16 @@ impl AppBuilder {
                     crate::tools::mcp::config::load_mcp_servers().await
                 };
                 match servers_result {
-                    Ok(servers) => {
+                    Ok(mut servers) => {
+                        if let Some(companion) = companion_mcp_server {
+                            let companion_name = companion.name.clone();
+                            if !servers.insert_if_absent(companion) {
+                                tracing::debug!(
+                                    "Skipping derived MCP companion '{}': an existing config with that name is already present",
+                                    companion_name
+                                );
+                            }
+                        }
                         let enabled: Vec<_> = servers.enabled_servers().cloned().collect();
                         if !enabled.is_empty() {
                             tracing::debug!(
@@ -545,6 +557,8 @@ impl AppBuilder {
                         let mut join_set = tokio::task::JoinSet::new();
                         for server in enabled {
                             let mcp_sm = Arc::clone(&mcp_sm);
+                            let nearai_session = Arc::clone(&self.session);
+                            let nearai_api_key = self.config.llm.nearai.api_key.clone();
                             let secrets = secrets_store.clone();
                             let tools = Arc::clone(&tools);
                             let pm = Arc::clone(&pm);
@@ -556,6 +570,8 @@ impl AppBuilder {
                                 let client = match crate::tools::mcp::create_client_from_config(
                                     server,
                                     &mcp_sm,
+                                    Some(nearai_session),
+                                    nearai_api_key,
                                     &pm,
                                     secrets,
                                     &owner_id,
@@ -712,6 +728,8 @@ impl AppBuilder {
             let manager = Arc::new(ExtensionManager::new(
                 Arc::clone(&mcp_session_manager),
                 Arc::clone(&mcp_process_manager),
+                Some(Arc::clone(&self.session)),
+                self.config.llm.nearai.api_key.clone(),
                 ext_secrets,
                 Arc::clone(tools),
                 Some(Arc::clone(hooks)),
@@ -721,6 +739,7 @@ impl AppBuilder {
                 self.config.tunnel.public_url.clone(),
                 self.config.owner_id.clone(),
                 self.db.clone(),
+                companion_mcp_server,
                 catalog_entries.clone(),
             ));
             tools.register_extension_tools(Arc::clone(&manager));

src/channels/web/handlers/extensions.rs

@@ -70,6 +70,7 @@ pub async fn extensions_list_handler(
                 tools: ext.tools,
                 needs_setup: ext.needs_setup,
                 has_auth: ext.has_auth,
+                derived: ext.derived,
                 activation_status,
                 activation_error: ext.activation_error,
                 version: ext.version,

src/channels/web/server.rs

@@ -2092,6 +2092,7 @@ async fn extensions_list_handler(
                 tools: ext.tools,
                 needs_setup: ext.needs_setup,
                 has_auth: ext.has_auth,
+                derived: ext.derived,
                 activation_status,
                 activation_error: ext.activation_error,
                 version: ext.version,
@@ -2948,6 +2949,7 @@ mod tests {
             tools: Vec::new(),
             needs_setup: true,
             has_auth: false,
+            derived: false,
             installed: true,
             activation_error: None,
             version: None,
@@ -2985,6 +2987,7 @@ mod tests {
             tools: Vec::new(),
             needs_setup: true,
             has_auth: false,
+            derived: false,
             installed: true,
             activation_error: None,
             version: None,
@@ -4177,6 +4180,8 @@ mod tests {
         let ext_mgr = Arc::new(ExtensionManager::new(
             mcp_sm,
             mcp_pm,
+            None,
+            None,
             secrets,
             tool_registry,
             None,
@@ -4186,6 +4191,7 @@ mod tests {
             None,
             "test".to_string(),
             None,
+            None,
             vec![],
         ));
         (ext_mgr, wasm_tools_dir, wasm_channels_dir)

src/channels/web/static/app.js

@@ -1160,7 +1160,7 @@ function addToolCard(name) {
 
   const toolName = document.createElement('span');
   toolName.className = 'activity-tool-name';
-  toolName.textContent = name;
+  toolName.textContent = humanizeToolName(name);
 
   const duration = document.createElement('span');
   duration.className = 'activity-tool-duration';
@@ -1344,7 +1344,7 @@ function finalizeActivityGroup() {
 
 function humanizeToolName(rawName) {
   if (!rawName) return '';
-  return String(rawName)
+  return stripDerivedCompanionToolPrefix(String(rawName))
     .replace(/[_-]+/g, ' ')
     .replace(/([a-z0-9])([A-Z])/g, '$1 $2')
     .replace(/^tool([a-zA-Z])/, 'tool $1')
@@ -1352,6 +1352,12 @@ function humanizeToolName(rawName) {
     .trim();
 }
 
+function stripDerivedCompanionToolPrefix(rawName) {
+  if (!rawName) return '';
+  const prefix = '_nearai_companion_mcp_';
+  return rawName.startsWith(prefix) ? rawName.slice(prefix.length) : rawName;
+}
+
 function shouldShowChannelConnectedMessage(extensionName, success) {
   if (!success || !extensionName) return false;
   return String(extensionName).toLowerCase().includes('telegram');
@@ -1871,7 +1877,7 @@ function createToolCallsSummaryElement(toolCalls) {
     const icon = tc.has_error ? '\u2717' : '\u2713';
     const nameSpan = document.createElement('span');
     nameSpan.className = 'tool-call-name';
-    nameSpan.textContent = icon + ' ' + tc.name;
+    nameSpan.textContent = icon + ' ' + humanizeToolName(tc.name);
     item.appendChild(nameSpan);
 
     if (tc.result_preview) {
@@ -2906,7 +2912,12 @@ function renderExtensionCard(ext) {
   if (ext.tools && ext.tools.length > 0) {
     const tools = document.createElement('div');
     tools.className = 'ext-tools';
-    tools.textContent = 'Tools: ' + ext.tools.join(', ');
+    const toolNames = ext.tools.map((toolName) => (
+      ext.derived && ext.kind === 'mcp_server'
+        ? stripDerivedCompanionToolPrefix(toolName)
+        : toolName
+    ));
+    tools.textContent = 'Tools: ' + toolNames.join(', ');
     card.appendChild(tools);
   }
 
@@ -2967,7 +2978,7 @@ function renderExtensionCard(ext) {
     // Skip when has_auth is true but needs_setup is false and not yet authenticated —
     // this means OAuth credentials resolve automatically (builtin/env) and the user
     // just needs to complete the OAuth flow, not fill in a config form.
-    if (ext.needs_setup || (ext.has_auth && ext.authenticated)) {
+    if (!ext.derived && (ext.needs_setup || (ext.has_auth && ext.authenticated))) {
       const configBtn = document.createElement('button');
       configBtn.className = 'btn-ext configure';
       configBtn.textContent = ext.authenticated ? I18n.t('ext.reconfigure') : I18n.t('ext.configure');
@@ -2976,11 +2987,13 @@ function renderExtensionCard(ext) {
     }
   }
 
-  const removeBtn = document.createElement('button');
+  if (!ext.derived) {
-  removeBtn.className = 'btn-ext remove';
+    const removeBtn = document.createElement('button');
-  removeBtn.textContent = I18n.t('ext.remove');
+    removeBtn.className = 'btn-ext remove';
-  removeBtn.addEventListener('click', () => removeExtension(ext.name));
+    removeBtn.textContent = I18n.t('ext.remove');
-  actions.appendChild(removeBtn);
+    removeBtn.addEventListener('click', () => removeExtension(ext.name));
+    actions.appendChild(removeBtn);
+  }
 
   card.appendChild(actions);
 

src/channels/web/types.rs

@@ -344,6 +344,9 @@ pub struct ExtensionInfo {
     /// Whether this extension has an auth configuration (OAuth or manual token).
     #[serde(default)]
     pub has_auth: bool,
+    /// Whether this extension is derived from runtime/provider state.
+    #[serde(default)]
+    pub derived: bool,
     /// WASM channel activation status.
     #[serde(skip_serializing_if = "Option::is_none")]
     pub activation_status: Option<ExtensionActivationStatus>,

src/cli/mcp.rs

@@ -8,7 +8,7 @@ use std::sync::Arc;
 
 use clap::{Args, Subcommand};
 
-use crate::config::Config;
+use crate::config::{Config, LlmConfig};
 use crate::db::Database;
 use crate::secrets::SecretsStore;
 use crate::tools::mcp::{
@@ -173,6 +173,13 @@ async fn add_server(args: McpAddArgs) -> anyhow::Result<()> {
         description,
     } = args;
 
+    if config::is_nearai_companion_server_name(&name) {
+        anyhow::bail!(
+            "Server name '{}' is reserved for the NEAR AI companion MCP server",
+            name
+        );
+    }
+
     let transport_lower = transport.to_lowercase();
 
     let mut config = match transport_lower.as_str() {
@@ -244,7 +251,7 @@ async fn add_server(args: McpAddArgs) -> anyhow::Result<()> {
 
     // Save (DB if available, else disk)
     let db = connect_db().await;
-    let mut servers = load_servers(db.as_deref()).await?;
+    let mut servers = load_persisted_servers(db.as_deref()).await?;
     servers.upsert(config);
     save_servers(db.as_deref(), &servers).await?;
 
@@ -281,8 +288,15 @@ async fn add_server(args: McpAddArgs) -> anyhow::Result<()> {
 
 /// Remove an MCP server.
 async fn remove_server(name: String) -> anyhow::Result<()> {
+    if config::is_nearai_companion_server_name(&name) {
+        anyhow::bail!(
+            "Server '{}' is derived from the active NEAR AI provider and cannot be removed directly",
+            name
+        );
+    }
+
     let db = connect_db().await;
-    let mut servers = load_servers(db.as_deref()).await?;
+    let mut servers = load_persisted_servers(db.as_deref()).await?;
     if !servers.remove(&name) {
         anyhow::bail!("Server '{}' not found", name);
     }
@@ -298,7 +312,7 @@ async fn remove_server(name: String) -> anyhow::Result<()> {
 /// List configured MCP servers.
 async fn list_servers(verbose: bool) -> anyhow::Result<()> {
     let db = connect_db().await;
-    let servers = load_servers(db.as_deref()).await?;
+    let servers = load_servers_with_derived(db.as_deref()).await?;
 
     if servers.servers.is_empty() {
         println!();
@@ -404,12 +418,23 @@ async fn list_servers(verbose: bool) -> anyhow::Result<()> {
 async fn auth_server(name: String, user_id: String) -> anyhow::Result<()> {
     // Get server config
     let db = connect_db().await;
-    let servers = load_servers(db.as_deref()).await?;
+    let servers = load_servers_with_derived(db.as_deref()).await?;
     let server = servers
         .get(&name)
         .cloned()
         .ok_or_else(|| anyhow::anyhow!("Server '{}' not found", name))?;
 
+    if server.uses_runtime_auth_source() {
+        println!();
+        println!(
+            "  Server '{}' reuses your active NEAR AI authentication and does not support separate MCP OAuth.",
+            name
+        );
+        println!("  Configure NEAR AI auth (API key or session login) instead.");
+        println!();
+        return Ok(());
+    }
+
     // Initialize secrets store
     let secrets = get_secrets_store().await?;
 
@@ -477,7 +502,7 @@ async fn auth_server(name: String, user_id: String) -> anyhow::Result<()> {
 async fn test_server(name: String, user_id: String) -> anyhow::Result<()> {
     // Get server config
     let db = connect_db().await;
-    let servers = load_servers(db.as_deref()).await?;
+    let servers = load_servers_with_derived(db.as_deref()).await?;
     let server = servers
         .get(&name)
         .cloned()
@@ -488,35 +513,66 @@ async fn test_server(name: String, user_id: String) -> anyhow::Result<()> {
 
     // Create client
     let session_manager = Arc::new(McpSessionManager::new());
-
+    let (client, has_tokens) = if server.uses_runtime_auth_source() {
-    // Always check for stored tokens (from either pre-configured OAuth or DCR)
-    let secrets = get_secrets_store().await?;
-    let has_tokens = is_authenticated(&server, &secrets, &user_id).await;
-
-    let client = if has_tokens {
-        // We have stored tokens, use authenticated client
-        McpClient::new_authenticated(server.clone(), session_manager.clone(), secrets, user_id)
-    } else if server.requires_auth() {
-        // OAuth configured but no tokens - need to authenticate
-        println!();
-        println!(
-            "  ✗ Not authenticated. Run 'ironclaw mcp auth {}' first.",
-            name
-        );
-        println!();
-        return Ok(());
-    } else {
-        // Use the factory to dispatch on transport type (HTTP, stdio, unix)
         let process_manager = Arc::new(McpProcessManager::new());
-        create_client_from_config(
+        let llm = resolve_llm_for_cli(as_settings_store(db.as_deref())).await?;
-            server.clone(),
+        let nearai_session = crate::llm::create_session_manager(llm.session.clone()).await;
-            &session_manager,
+        (
-            &process_manager,
+            create_client_from_config(
-            None,
+                server.clone(),
-            "default",
+                &session_manager,
+                Some(nearai_session),
+                llm.nearai.api_key.clone(),
+                &process_manager,
+                None,
+                "default",
+            )
+            .await
+            .map_err(|e| anyhow::anyhow!("{}", e))?,
+            false,
         )
-        .await
+    } else {
-        .map_err(|e| anyhow::anyhow!("{}", e))?
+        // Only initialize the secrets store for non-runtime-auth servers that
+        // can actually use persisted OAuth/DCR tokens.
+        let secrets = get_secrets_store().await?;
+        let has_tokens = is_authenticated(&server, &secrets, &user_id).await;
+
+        if has_tokens {
+            (
+                McpClient::new_authenticated(
+                    server.clone(),
+                    session_manager.clone(),
+                    secrets,
+                    user_id,
+                ),
+                true,
+            )
+        } else if server.requires_auth() {
+            println!();
+            println!(
+                "  ✗ Not authenticated. Run 'ironclaw mcp auth {}' first.",
+                name
+            );
+            println!();
+            return Ok(());
+        } else {
+            // Use the factory to dispatch on transport type (HTTP, stdio, unix)
+            let process_manager = Arc::new(McpProcessManager::new());
+            (
+                create_client_from_config(
+                    server.clone(),
+                    &session_manager,
+                    None,
+                    None,
+                    &process_manager,
+                    None,
+                    "default",
+                )
+                .await
+                .map_err(|e| anyhow::anyhow!("{}", e))?,
+                false,
+            )
+        }
     };
 
     // Test connection
@@ -581,8 +637,15 @@ async fn test_server(name: String, user_id: String) -> anyhow::Result<()> {
 
 /// Toggle server enabled/disabled state.
 async fn toggle_server(name: String, enable: bool, disable: bool) -> anyhow::Result<()> {
+    if config::is_nearai_companion_server_name(&name) {
+        anyhow::bail!(
+            "Server '{}' is derived from the active NEAR AI provider and cannot be toggled directly",
+            name
+        );
+    }
+
     let db = connect_db().await;
-    let mut servers = load_servers(db.as_deref()).await?;
+    let mut servers = load_persisted_servers(db.as_deref()).await?;
 
     let server = servers
         .get_mut(&name)
@@ -615,13 +678,30 @@ async fn connect_db() -> Option<Arc<dyn Database>> {
     crate::db::connect_from_config(&config.database).await.ok()
 }
 
-/// Load MCP servers (DB if available, else disk).
+/// Load only persisted MCP servers (DB if available, else disk).
-async fn load_servers(db: Option<&dyn Database>) -> Result<McpServersFile, config::ConfigError> {
+async fn load_persisted_servers(
-    if let Some(db) = db {
+    db: Option<&dyn Database>,
-        config::load_mcp_servers_from_db(db, DEFAULT_USER_ID).await
+) -> Result<McpServersFile, config::ConfigError> {
+    Ok(if let Some(db) = db {
+        config::load_mcp_servers_from_db(db, DEFAULT_USER_ID).await?
     } else {
-        config::load_mcp_servers().await
+        config::load_mcp_servers().await?
+    })
+}
+
+/// Load MCP servers plus any derived runtime companions.
+async fn load_servers_with_derived(
+    db: Option<&dyn Database>,
+) -> Result<McpServersFile, config::ConfigError> {
+    let mut servers = load_persisted_servers(db).await?;
+
+    if let Ok(llm) = resolve_llm_for_cli(as_settings_store(db)).await
+        && let Some(companion) = config::derive_nearai_companion_mcp_server_from_llm(&llm)
+    {
+        servers.insert_if_absent(companion);
     }
+
+    Ok(servers)
 }
 
 /// Save MCP servers (DB if available, else disk).
@@ -629,10 +709,15 @@ async fn save_servers(
     db: Option<&dyn Database>,
     servers: &McpServersFile,
 ) -> Result<(), config::ConfigError> {
+    let mut persisted = servers.clone();
+    persisted
+        .servers
+        .retain(|server| !config::is_nearai_companion_server_name(&server.name));
+
     if let Some(db) = db {
-        config::save_mcp_servers_to_db(db, DEFAULT_USER_ID, servers).await
+        config::save_mcp_servers_to_db(db, DEFAULT_USER_ID, &persisted).await
     } else {
-        config::save_mcp_servers(servers).await
+        config::save_mcp_servers(&persisted).await
     }
 }
 
@@ -641,10 +726,84 @@ async fn get_secrets_store() -> anyhow::Result<Arc<dyn SecretsStore + Send + Syn
     crate::cli::init_secrets_store().await
 }
 
+fn as_settings_store(db: Option<&dyn Database>) -> Option<&(dyn crate::db::SettingsStore + Sync)> {
+    db.map(|db| db as &(dyn crate::db::SettingsStore + Sync))
+}
+
+async fn resolve_llm_for_cli(
+    store: Option<&(dyn crate::db::SettingsStore + Sync)>,
+) -> Result<LlmConfig, crate::error::ConfigError> {
+    resolve_llm_for_cli_with_toml(store, None).await
+}
+
+async fn resolve_llm_for_cli_with_toml(
+    store: Option<&(dyn crate::db::SettingsStore + Sync)>,
+    toml_path: Option<&std::path::Path>,
+) -> Result<LlmConfig, crate::error::ConfigError> {
+    if let Some(store) = store {
+        let _ = dotenvy::dotenv();
+        crate::bootstrap::load_ironclaw_env();
+
+        let mut settings = match store.get_all_settings(DEFAULT_USER_ID).await {
+            Ok(map) => crate::settings::Settings::from_db_map(&map),
+            Err(e) => {
+                tracing::warn!(
+                    "Failed to load CLI settings from DB, falling back to defaults before env/TOML resolution: {}",
+                    e
+                );
+                crate::settings::Settings::default()
+            }
+        };
+
+        apply_cli_toml_overlay(&mut settings, toml_path)?;
+        return LlmConfig::resolve(&settings);
+    }
+
+    let settings = crate::config::load_bootstrap_settings(toml_path)?;
+    LlmConfig::resolve(&settings)
+}
+
+fn apply_cli_toml_overlay(
+    settings: &mut crate::settings::Settings,
+    explicit_path: Option<&std::path::Path>,
+) -> Result<(), crate::error::ConfigError> {
+    let path = explicit_path
+        .map(std::path::PathBuf::from)
+        .unwrap_or_else(crate::settings::Settings::default_toml_path);
+
+    match crate::settings::Settings::load_toml(&path) {
+        Ok(Some(toml_settings)) => {
+            settings.merge_from(&toml_settings);
+        }
+        Ok(None) => {
+            if explicit_path.is_some() {
+                return Err(crate::error::ConfigError::ParseError(format!(
+                    "Config file not found: {}",
+                    path.display()
+                )));
+            }
+        }
+        Err(e) => {
+            return Err(crate::error::ConfigError::ParseError(e));
+        }
+    }
+
+    Ok(())
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;
 
+    use std::collections::HashMap;
+
+    use async_trait::async_trait;
+
+    use crate::error::DatabaseError;
+    use crate::history::SettingRow;
+    #[cfg(feature = "libsql")]
+    use tempfile::NamedTempFile;
+
     #[test]
     fn test_mcp_command_parsing() {
         // Just verify the command structure is valid
@@ -701,4 +860,129 @@ mod tests {
         assert!(result.is_err());
         assert!(result.unwrap_err().contains("invalid env var format"));
     }
+
+    #[cfg(feature = "libsql")]
+    #[allow(clippy::await_holding_lock)]
+    #[tokio::test]
+    async fn test_resolve_llm_for_cli_uses_db_backed_selected_model() {
+        struct MockSettingsStore {
+            settings: HashMap<String, serde_json::Value>,
+        }
+
+        #[async_trait]
+        impl crate::db::SettingsStore for MockSettingsStore {
+            async fn get_setting(
+                &self,
+                _user_id: &str,
+                key: &str,
+            ) -> Result<Option<serde_json::Value>, DatabaseError> {
+                Ok(self.settings.get(key).cloned())
+            }
+
+            async fn get_setting_full(
+                &self,
+                _user_id: &str,
+                _key: &str,
+            ) -> Result<Option<SettingRow>, DatabaseError> {
+                Ok(None)
+            }
+
+            async fn set_setting(
+                &self,
+                _user_id: &str,
+                _key: &str,
+                _value: &serde_json::Value,
+            ) -> Result<(), DatabaseError> {
+                Err(DatabaseError::Query("unused in test".to_string()))
+            }
+
+            async fn delete_setting(
+                &self,
+                _user_id: &str,
+                _key: &str,
+            ) -> Result<bool, DatabaseError> {
+                Err(DatabaseError::Query("unused in test".to_string()))
+            }
+
+            async fn list_settings(
+                &self,
+                _user_id: &str,
+            ) -> Result<Vec<SettingRow>, DatabaseError> {
+                Ok(Vec::new())
+            }
+
+            async fn get_all_settings(
+                &self,
+                _user_id: &str,
+            ) -> Result<HashMap<String, serde_json::Value>, DatabaseError> {
+                Ok(self.settings.clone())
+            }
+
+            async fn set_all_settings(
+                &self,
+                _user_id: &str,
+                _settings: &HashMap<String, serde_json::Value>,
+            ) -> Result<(), DatabaseError> {
+                Err(DatabaseError::Query("unused in test".to_string()))
+            }
+
+            async fn has_settings(&self, _user_id: &str) -> Result<bool, DatabaseError> {
+                Ok(!self.settings.is_empty())
+            }
+        }
+
+        struct EnvGuard(&'static str, Option<String>);
+
+        impl Drop for EnvGuard {
+            fn drop(&mut self) {
+                // SAFETY: Protected by ENV_MUTEX for the duration of the test.
+                unsafe {
+                    match &self.1 {
+                        Some(value) => std::env::set_var(self.0, value),
+                        None => std::env::remove_var(self.0),
+                    }
+                }
+            }
+        }
+
+        let _mutex = crate::config::helpers::ENV_MUTEX.lock().expect("env mutex");
+        let prev_backend = std::env::var("LLM_BACKEND").ok();
+        let prev_base_url = std::env::var("NEARAI_BASE_URL").ok();
+        let prev_auth_url = std::env::var("NEARAI_AUTH_URL").ok();
+        let prev_model = std::env::var("NEARAI_MODEL").ok();
+
+        // SAFETY: Protected by ENV_MUTEX for the duration of the test.
+        unsafe {
+            std::env::set_var("LLM_BACKEND", "");
+            std::env::set_var("NEARAI_BASE_URL", "http://127.0.0.1:11434/v1");
+            std::env::set_var("NEARAI_AUTH_URL", "http://127.0.0.1:11435");
+            std::env::set_var("NEARAI_MODEL", "");
+        }
+
+        let _backend_guard = EnvGuard("LLM_BACKEND", prev_backend);
+        let _base_url_guard = EnvGuard("NEARAI_BASE_URL", prev_base_url);
+        let _auth_url_guard = EnvGuard("NEARAI_AUTH_URL", prev_auth_url);
+        let _model_guard = EnvGuard("NEARAI_MODEL", prev_model);
+
+        let empty_toml = NamedTempFile::new().expect("temp toml");
+        let store = MockSettingsStore {
+            settings: HashMap::from([
+                ("llm_backend".to_string(), serde_json::json!("nearai")),
+                (
+                    "selected_model".to_string(),
+                    serde_json::json!("db-backed-nearai-model"),
+                ),
+            ]),
+        };
+
+        let llm = resolve_llm_for_cli_with_toml(Some(&store), Some(empty_toml.path()))
+            .await
+            .expect("resolve llm");
+        assert_eq!(llm.backend, "nearai");
+        assert_eq!(llm.nearai.model, "db-backed-nearai-model");
+
+        let companion =
+            config::derive_nearai_companion_mcp_server_from_llm(&llm).expect("derived companion");
+        assert_eq!(companion.url, "http://127.0.0.1:11434/mcp");
+    }
 }

src/extensions/manager.rs

@@ -366,6 +366,8 @@ pub struct ExtensionManager {
     // MCP infrastructure
     mcp_session_manager: Arc<McpSessionManager>,
     mcp_process_manager: Arc<crate::tools::mcp::process::McpProcessManager>,
+    nearai_session_manager: Option<Arc<crate::llm::SessionManager>>,
+    nearai_api_key: Option<secrecy::SecretString>,
     /// Active MCP clients keyed by server name.
     mcp_clients: RwLock<HashMap<String, Arc<McpClient>>>,
 
@@ -389,6 +391,8 @@ pub struct ExtensionManager {
     user_id: String,
     /// Optional database store for DB-backed MCP config.
     store: Option<Arc<dyn crate::db::Database>>,
+    /// Companion MCP server derived from the active provider config.
+    companion_mcp_server: Option<McpServerConfig>,
     /// Names of WASM channels that were successfully loaded at startup.
     active_channel_names: RwLock<HashSet<String>>,
     /// Installed channel-relay extensions (no on-disk artifact, tracked in memory).
@@ -497,6 +501,8 @@ impl ExtensionManager {
     pub fn new(
         mcp_session_manager: Arc<McpSessionManager>,
         mcp_process_manager: Arc<crate::tools::mcp::process::McpProcessManager>,
+        nearai_session_manager: Option<Arc<crate::llm::SessionManager>>,
+        nearai_api_key: Option<secrecy::SecretString>,
         secrets: Arc<dyn SecretsStore + Send + Sync>,
         tool_registry: Arc<ToolRegistry>,
         hooks: Option<Arc<HookRegistry>>,
@@ -506,6 +512,7 @@ impl ExtensionManager {
         tunnel_url: Option<String>,
         user_id: String,
         store: Option<Arc<dyn crate::db::Database>>,
+        companion_mcp_server: Option<McpServerConfig>,
         catalog_entries: Vec<RegistryEntry>,
     ) -> Self {
         let registry = if catalog_entries.is_empty() {
@@ -518,6 +525,8 @@ impl ExtensionManager {
             discovery: OnlineDiscovery::new(),
             mcp_session_manager,
             mcp_process_manager,
+            nearai_session_manager,
+            nearai_api_key,
             mcp_clients: RwLock::new(HashMap::new()),
             wasm_tool_runtime,
             wasm_tools_dir,
@@ -531,6 +540,7 @@ impl ExtensionManager {
             tunnel_url,
             user_id,
             store,
+            companion_mcp_server,
             active_channel_names: RwLock::new(HashSet::new()),
             installed_relay_extensions: RwLock::new(HashSet::new()),
             activation_errors: RwLock::new(HashMap::new()),
@@ -1269,6 +1279,12 @@ impl ExtensionManager {
         tracing::info!(extension = %name, url = ?sanitized_url, kind = ?kind_hint, "Installing extension");
         Self::validate_extension_name(name)?;
 
+        if crate::tools::mcp::config::is_nearai_companion_server_name(name) {
+            return Err(ExtensionError::Config(
+                "This extension name is reserved for the NEAR AI companion MCP server".to_string(),
+            ));
+        }
+
         // If we have a registry entry, use it (prefer kind_hint to resolve collisions)
         if let Some(entry) = self.registry.get_with_kind(name, kind_hint).await {
             return self.install_from_entry(&entry, user_id).await.map_err(|e| {
@@ -1344,6 +1360,32 @@ impl ExtensionManager {
         }
     }
 
+    /// Activate the derived NEAR AI companion MCP server if auth is already
+    /// available and the companion is not active yet.
+    ///
+    /// Returns `Ok(true)` only when this call performed an activation.
+    pub async fn ensure_nearai_companion_active_if_ready(&self) -> Result<bool, ExtensionError> {
+        let Some(companion) = self.companion_mcp_server.as_ref() else {
+            return Ok(false);
+        };
+
+        let companion_name = companion.name.clone();
+
+        {
+            let clients = self.mcp_clients.read().await;
+            if clients.contains_key(&companion_name) {
+                return Ok(false);
+            }
+        }
+
+        if !self.is_runtime_authenticated(companion).await {
+            return Ok(false);
+        }
+
+        self.activate(&companion_name, &self.user_id).await?;
+        Ok(true)
+    }
+
     /// List extensions with their status.
     ///
     /// When `include_available` is `true`, registry entries that are not yet
@@ -1361,7 +1403,11 @@ impl ExtensionManager {
             match self.load_mcp_servers(user_id).await {
                 Ok(servers) => {
                     for server in &servers.servers {
-                        let authenticated = is_authenticated(server, &self.secrets, user_id).await;
+                        let authenticated = if server.uses_runtime_auth_source() {
+                            self.is_runtime_authenticated(server).await
+                        } else {
+                            is_authenticated(server, &self.secrets, user_id).await
+                        };
                         let clients = self.mcp_clients.read().await;
                         let active = clients.contains_key(&server.name);
 
@@ -1377,11 +1423,17 @@ impl ExtensionManager {
                             Vec::new()
                         };
 
-                        let display_name = self
+                        let display_name =
-                            .registry
+                            if crate::tools::mcp::config::is_nearai_companion_server_name(
-                            .get_with_kind(&server.name, Some(ExtensionKind::McpServer))
+                                &server.name,
-                            .await
+                            ) {
-                            .map(|e| e.display_name);
+                                Some("NEAR AI Companion".to_string())
+                            } else {
+                                self.registry
+                                    .get_with_kind(&server.name, Some(ExtensionKind::McpServer))
+                                    .await
+                                    .map(|e| e.display_name)
+                            };
                         extensions.push(InstalledExtension {
                             name: server.name.clone(),
                             kind: ExtensionKind::McpServer,
@@ -1392,7 +1444,10 @@ impl ExtensionManager {
                             active,
                             tools,
                             needs_setup: false,
-                            has_auth: false,
+                            has_auth: server.requires_auth(),
+                            derived: crate::tools::mcp::config::is_nearai_companion_server_name(
+                                &server.name,
+                            ),
                             installed: true,
                             activation_error: None,
                             version: None,
@@ -1444,6 +1499,7 @@ impl ExtensionManager {
                             tools: if active { vec![name] } else { Vec::new() },
                             needs_setup: auth_state == ToolAuthState::NeedsSetup,
                             has_auth: auth_state != ToolAuthState::NoAuth,
+                            derived: false,
                             installed: true,
                             activation_error: None,
                             version,
@@ -1500,6 +1556,7 @@ impl ExtensionManager {
                             tools: Vec::new(),
                             needs_setup: auth_state == ToolAuthState::NeedsSetup,
                             has_auth: auth_state != ToolAuthState::NoAuth,
+                            derived: false,
                             installed: true,
                             activation_error,
                             version,
@@ -1538,6 +1595,7 @@ impl ExtensionManager {
                     tools: Vec::new(),
                     needs_setup: false,
                     has_auth: true,
+                    derived: false,
                     installed: true,
                     activation_error,
                     version: None,
@@ -1572,6 +1630,7 @@ impl ExtensionManager {
                     tools: Vec::new(),
                     needs_setup: false,
                     has_auth: false,
+                    derived: false,
                     installed: false,
                     activation_error: None,
                     version: entry.version,
@@ -1602,6 +1661,12 @@ impl ExtensionManager {
 
         match kind {
             ExtensionKind::McpServer => {
+                if crate::tools::mcp::config::is_nearai_companion_server_name(name) {
+                    return Err(ExtensionError::Config(
+                        "This MCP server is derived from the active NEAR AI provider and cannot be removed directly".to_string(),
+                    ));
+                }
+
                 // Unregister tools with this server's prefix
                 let tool_names: Vec<String> = self
                     .tool_registry
@@ -2059,10 +2124,39 @@ impl ExtensionManager {
         user_id: &str,
     ) -> Result<crate::tools::mcp::config::McpServersFile, crate::tools::mcp::config::ConfigError>
     {
-        if let Some(ref store) = self.store {
+        let mut servers = if let Some(ref store) = self.store {
-            crate::tools::mcp::config::load_mcp_servers_from_db(store.as_ref(), user_id).await
+            crate::tools::mcp::config::load_mcp_servers_from_db(store.as_ref(), user_id).await?
         } else {
-            crate::tools::mcp::config::load_mcp_servers().await
+            crate::tools::mcp::config::load_mcp_servers().await?
+        };
+
+        if let Some(ref companion) = self.companion_mcp_server {
+            servers.insert_if_absent(companion.clone());
+        }
+
+        Ok(servers)
+    }
+
+    async fn is_runtime_authenticated(&self, server: &McpServerConfig) -> bool {
+        match server.auth_source {
+            Some(crate::tools::mcp::config::McpAuthSource::NearAi) => {
+                if self.nearai_api_key.is_some() {
+                    return true;
+                }
+
+                if let Some(key) = crate::config::helpers::env_or_override("NEARAI_API_KEY")
+                    && !key.trim().is_empty()
+                {
+                    return true;
+                }
+
+                if let Some(ref session) = self.nearai_session_manager {
+                    return session.has_token().await;
+                }
+
+                false
+            }
+            None => false,
         }
     }
 
@@ -2624,6 +2718,20 @@ impl ExtensionManager {
             .await
             .map_err(|e| ExtensionError::NotInstalled(e.to_string()))?;
 
+        if server.uses_runtime_auth_source() {
+            if self.is_runtime_authenticated(&server).await {
+                return Ok(AuthResult::authenticated(name, ExtensionKind::McpServer));
+            }
+
+            return Ok(AuthResult::needs_setup(
+                name,
+                ExtensionKind::McpServer,
+                "This MCP server reuses your active NEAR AI authentication. Configure a NEAR AI API key or sign in to NEAR AI first, then try again."
+                    .to_string(),
+                None,
+            ));
+        }
+
         // Check if already authenticated
         if is_authenticated(&server, &self.secrets, user_id).await {
             return Ok(AuthResult::authenticated(name, ExtensionKind::McpServer));
@@ -3675,6 +3783,8 @@ impl ExtensionManager {
         let client = crate::tools::mcp::create_client_from_config(
             server.clone(),
             &self.mcp_session_manager,
+            self.nearai_session_manager.clone(),
+            self.nearai_api_key.clone(),
             &self.mcp_process_manager,
             Some(Arc::clone(&self.secrets)),
             user_id,
@@ -5295,6 +5405,12 @@ impl ExtensionManager {
                     .get_mcp_server(name, user_id)
                     .await
                     .map_err(|e| ExtensionError::NotInstalled(e.to_string()))?;
+                if server.uses_runtime_auth_source() {
+                    return Err(ExtensionError::Other(format!(
+                        "Server '{}' reuses your active NEAR AI authentication and does not accept manually configured MCP tokens",
+                        name
+                    )));
+                }
                 let mut names = std::collections::HashSet::new();
                 names.insert(server.token_secret_name());
                 (names, Vec::new())
@@ -6299,6 +6415,8 @@ mod tests {
         tools_dir: std::path::PathBuf,
         channels_dir: std::path::PathBuf,
         store: Option<Arc<dyn crate::db::Database>>,
+        companion_mcp_server: Option<crate::tools::mcp::config::McpServerConfig>,
+        nearai_session_manager: Option<Arc<crate::llm::SessionManager>>,
     ) -> crate::extensions::manager::ExtensionManager {
         use crate::secrets::{InMemorySecretsStore, SecretsCrypto};
         use crate::tools::mcp::process::McpProcessManager;
@@ -6317,15 +6435,18 @@ mod tests {
         crate::extensions::manager::ExtensionManager::new(
             mcp,
             Arc::new(McpProcessManager::new()),
+            nearai_session_manager,
+            None,
             secrets,
             tools,
             None, // hooks
             wasm_runtime,
             tools_dir,
             channels_dir,
-            None,               // tunnel_url
+            None, // tunnel_url
-            "test".to_string(), // user_id
+            "test".to_string(),
             store,
+            companion_mcp_server,
             vec![],
         )
     }
@@ -6334,7 +6455,7 @@ mod tests {
         wasm_runtime: Option<Arc<crate::tools::wasm::WasmToolRuntime>>,
         tools_dir: std::path::PathBuf,
     ) -> crate::extensions::manager::ExtensionManager {
-        make_test_manager_with_dirs(wasm_runtime, tools_dir.clone(), tools_dir, None)
+        make_test_manager_with_dirs(wasm_runtime, tools_dir.clone(), tools_dir, None, None, None)
     }
 
     fn write_test_tool(
@@ -6395,6 +6516,8 @@ mod tests {
             dir.path().join("tools"),
             dir.path().join("channels"),
             Some(Arc::clone(&store)),
+            None,
+            None,
         );
         let field = crate::tools::wasm::ToolFieldSetupSchema {
             name: "provider".to_string(),
@@ -6436,8 +6559,14 @@ mod tests {
         );
         let channels_dir = dir.path().join("channels");
 
-        let mgr =
+        let mgr = make_test_manager_with_dirs(
-            make_test_manager_with_dirs(None, tools_dir, channels_dir, Some(Arc::clone(&store)));
+            None,
+            tools_dir,
+            channels_dir,
+            Some(Arc::clone(&store)),
+            None,
+            None,
+        );
         let mut fields = std::collections::HashMap::new();
         fields.insert("llm_backend".to_string(), "openai".to_string());
 
@@ -6489,8 +6618,14 @@ mod tests {
         );
         let channels_dir = dir.path().join("channels");
 
-        let mgr =
+        let mgr = make_test_manager_with_dirs(
-            make_test_manager_with_dirs(None, tools_dir, channels_dir, Some(Arc::clone(&store)));
+            None,
+            tools_dir,
+            channels_dir,
+            Some(Arc::clone(&store)),
+            None,
+            None,
+        );
         let mut fields = std::collections::HashMap::new();
         fields.insert("session".to_string(), "overwrite".to_string());
 
@@ -6563,6 +6698,272 @@ mod tests {
         );
     }
 
+    #[tokio::test]
+    async fn test_install_rejects_reserved_nearai_companion_name() {
+        let dir = tempfile::tempdir().expect("temp dir");
+        let manager = make_test_manager(None, dir.path().to_path_buf());
+
+        let err = manager
+            .install(
+                crate::tools::mcp::config::NEARAI_COMPANION_MCP_NAME,
+                Some("https://mcp.example.com"),
+                Some(ExtensionKind::McpServer),
+                "test",
+            )
+            .await
+            .expect_err("reserved companion name should be rejected");
+
+        assert!(
+            matches!(err, ExtensionError::Config(_)),
+            "Expected config error, got: {err:?}"
+        );
+        assert!(
+            err.to_string().contains("reserved"),
+            "Expected reserved-name message, got: {err}"
+        );
+    }
+
+    #[tokio::test]
+    async fn test_ensure_nearai_companion_active_if_ready_skips_without_auth() {
+        let dir = tempfile::tempdir().expect("temp dir");
+        let companion = crate::tools::mcp::config::McpServerConfig::new(
+            crate::tools::mcp::config::NEARAI_COMPANION_MCP_NAME,
+            "https://private.near.ai/mcp",
+        )
+        .with_auth_source(crate::tools::mcp::config::McpAuthSource::NearAi);
+        let manager = make_test_manager_with_dirs(
+            None,
+            dir.path().join("tools"),
+            dir.path().join("channels"),
+            None,
+            Some(companion),
+            None,
+        );
+
+        let activated = manager
+            .ensure_nearai_companion_active_if_ready()
+            .await
+            .expect("helper should not fail when auth is missing");
+
+        assert!(!activated, "companion should not activate without auth");
+        assert!(
+            !manager
+                .mcp_clients
+                .read()
+                .await
+                .contains_key(crate::tools::mcp::config::NEARAI_COMPANION_MCP_NAME)
+        );
+    }
+
+    #[allow(clippy::await_holding_lock)]
+    #[tokio::test]
+    async fn test_runtime_auth_detects_runtime_nearai_api_key_override() {
+        struct EnvGuard(&'static str, Option<String>);
+
+        impl Drop for EnvGuard {
+            fn drop(&mut self) {
+                // SAFETY: Protected by ENV_MUTEX for the duration of the test.
+                unsafe {
+                    match &self.1 {
+                        Some(value) => std::env::set_var(self.0, value),
+                        None => std::env::remove_var(self.0),
+                    }
+                }
+                crate::config::helpers::set_runtime_env(self.0, "");
+            }
+        }
+
+        let _mutex = crate::config::helpers::ENV_MUTEX.lock().expect("env mutex");
+        let prev = std::env::var("NEARAI_API_KEY").ok();
+        // SAFETY: Protected by ENV_MUTEX for the duration of the test.
+        unsafe { std::env::remove_var("NEARAI_API_KEY") };
+        let _env_guard = EnvGuard("NEARAI_API_KEY", prev);
+
+        crate::config::helpers::set_runtime_env("NEARAI_API_KEY", "runtime-overlay-key");
+
+        let dir = tempfile::tempdir().expect("temp dir");
+        let companion = crate::tools::mcp::config::McpServerConfig::new(
+            crate::tools::mcp::config::NEARAI_COMPANION_MCP_NAME,
+            "https://private.near.ai/mcp",
+        )
+        .with_auth_source(crate::tools::mcp::config::McpAuthSource::NearAi);
+        let manager = make_test_manager_with_dirs(
+            None,
+            dir.path().join("tools"),
+            dir.path().join("channels"),
+            None,
+            Some(companion.clone()),
+            None,
+        );
+
+        assert!(
+            manager.is_runtime_authenticated(&companion).await,
+            "runtime NEARAI_API_KEY override should count as authenticated"
+        );
+    }
+
+    async fn start_runtime_auth_mock_mcp_server() -> (String, tokio::task::JoinHandle<()>) {
+        use axum::extract::State;
+        use axum::http::{HeaderMap, StatusCode};
+        use axum::response::IntoResponse;
+        use axum::routing::post;
+        use axum::{Json, Router};
+        use std::sync::Arc;
+
+        #[derive(Clone)]
+        struct MockState {
+            auth_token: &'static str,
+        }
+
+        #[derive(serde::Deserialize)]
+        struct JsonRpcRequest {
+            id: Option<serde_json::Value>,
+            method: String,
+        }
+
+        async fn handle_mcp(
+            State(state): State<Arc<MockState>>,
+            headers: HeaderMap,
+            Json(req): Json<JsonRpcRequest>,
+        ) -> impl IntoResponse {
+            let auth = headers
+                .get("authorization")
+                .and_then(|v| v.to_str().ok())
+                .unwrap_or("");
+
+            if auth != format!("Bearer {}", state.auth_token) {
+                return (
+                    StatusCode::UNAUTHORIZED,
+                    Json(serde_json::json!({
+                        "jsonrpc": "2.0",
+                        "id": req.id,
+                        "error": {"code": -32000, "message": "Unauthorized"}
+                    })),
+                )
+                    .into_response();
+            }
+
+            if req.id.is_none() {
+                return StatusCode::OK.into_response();
+            }
+
+            let body = match req.method.as_str() {
+                "initialize" => serde_json::json!({
+                    "jsonrpc": "2.0",
+                    "id": req.id,
+                    "result": {
+                        "protocolVersion": "2024-11-05",
+                        "serverInfo": {
+                            "name": "mock-mcp-server",
+                            "version": "1.0.0"
+                        },
+                        "capabilities": {
+                            "tools": {}
+                        }
+                    }
+                }),
+                "tools/list" => serde_json::json!({
+                    "jsonrpc": "2.0",
+                    "id": req.id,
+                    "result": {
+                        "tools": [{
+                            "name": "echo",
+                            "description": "Mock companion tool",
+                            "inputSchema": {
+                                "type": "object",
+                                "properties": {}
+                            }
+                        }]
+                    }
+                }),
+                _ => serde_json::json!({
+                    "jsonrpc": "2.0",
+                    "id": req.id,
+                    "error": {
+                        "code": -32601,
+                        "message": format!("Method not found: {}", req.method)
+                    }
+                }),
+            };
+
+            Json(body).into_response()
+        }
+
+        let listener = tokio::net::TcpListener::bind("127.0.0.1:0")
+            .await
+            .expect("bind mock MCP server");
+        let addr = listener.local_addr().expect("local addr");
+        let base_url = format!("http://127.0.0.1:{}", addr.port());
+        let app = Router::new()
+            .route("/mcp", post(handle_mcp))
+            .with_state(Arc::new(MockState {
+                auth_token: "mock-access-token",
+            }));
+
+        let handle = tokio::spawn(async move {
+            axum::serve(listener, app).await.expect("serve mock MCP");
+        });
+
+        (format!("{base_url}/mcp"), handle)
+    }
+
+    #[tokio::test]
+    async fn test_ensure_nearai_companion_active_if_ready_activates_after_auth_becomes_available() {
+        let dir = tempfile::tempdir().expect("temp dir");
+        let (mcp_url, server_handle) = start_runtime_auth_mock_mcp_server().await;
+        let session = Arc::new(crate::llm::SessionManager::new(
+            crate::llm::SessionConfig::default(),
+        ));
+        let companion = crate::tools::mcp::config::McpServerConfig::new(
+            crate::tools::mcp::config::NEARAI_COMPANION_MCP_NAME,
+            mcp_url,
+        )
+        .with_auth_source(crate::tools::mcp::config::McpAuthSource::NearAi);
+        let manager = make_test_manager_with_dirs(
+            None,
+            dir.path().join("tools"),
+            dir.path().join("channels"),
+            None,
+            Some(companion),
+            Some(session.clone()),
+        );
+
+        let first = manager
+            .ensure_nearai_companion_active_if_ready()
+            .await
+            .expect("helper should skip cleanly before auth exists");
+        assert!(!first, "companion should not activate before auth exists");
+
+        session
+            .set_token(secrecy::SecretString::from("mock-access-token"))
+            .await;
+
+        let second = manager
+            .ensure_nearai_companion_active_if_ready()
+            .await
+            .expect("helper should activate once auth becomes available");
+
+        assert!(second, "companion should activate after auth appears");
+        assert!(
+            manager
+                .mcp_clients
+                .read()
+                .await
+                .contains_key(crate::tools::mcp::config::NEARAI_COMPANION_MCP_NAME)
+        );
+        assert!(
+            manager.tool_registry.list().await.into_iter().any(|name| {
+                name == format!(
+                    "{}_echo",
+                    crate::tools::mcp::config::NEARAI_COMPANION_MCP_NAME
+                )
+            }),
+            "expected companion tool to be registered after delayed activation"
+        );
+
+        server_handle.abort();
+    }
+
     #[test]
     fn test_capabilities_files_also_separate() {
         // capabilities.json files for tools and channels should also be separate.
@@ -6685,6 +7086,8 @@ mod tests {
         ExtensionManager::new(
             Arc::new(McpSessionManager::new()),
             Arc::new(McpProcessManager::new()),
+            None,
+            None,
             Arc::new(InMemorySecretsStore::new(crypto)),
             Arc::new(ToolRegistry::new()),
             None,
@@ -6694,6 +7097,7 @@ mod tests {
             None,
             "test".to_string(),
             None,
+            None,
             Vec::new(),
         )
     }
@@ -6835,6 +7239,8 @@ mod tests {
             ExtensionManager::new(
                 Arc::new(McpSessionManager::new()),
                 Arc::new(McpProcessManager::new()),
+                None,
+                None,
                 Arc::new(InMemorySecretsStore::new(crypto)),
                 Arc::new(ToolRegistry::new()),
                 None,
@@ -6844,6 +7250,7 @@ mod tests {
                 None,
                 "test".to_string(),
                 Some(db),
+                None,
                 Vec::new(),
             )
         };
@@ -7097,6 +7504,8 @@ mod tests {
         let manager = ExtensionManager::new(
             Arc::new(McpSessionManager::new()),
             Arc::new(McpProcessManager::new()),
+            None,
+            None,
             Arc::new(InMemorySecretsStore::new(crypto)),
             Arc::new(ToolRegistry::new()),
             None,
@@ -7106,6 +7515,7 @@ mod tests {
             None,
             "test".to_string(),
             Some(db.clone() as Arc<dyn crate::db::Database>),
+            None,
             Vec::new(),
         );
 
@@ -7590,7 +8000,8 @@ mod tests {
         let dir = tempfile::tempdir().expect("temp dir");
         let tools_dir = dir.path().join("tools");
         let channels_dir = dir.path().join("channels");
-        let mgr = make_test_manager_with_dirs(None, tools_dir, channels_dir.clone(), None);
+        let mgr =
+            make_test_manager_with_dirs(None, tools_dir, channels_dir.clone(), None, None, None);
 
         let wasm_path = channels_dir.join("telegram.wasm");
         let cap_path = channels_dir.join("telegram.capabilities.json");
@@ -7734,6 +8145,8 @@ mod tests {
         ExtensionManager::new(
             mcp,
             Arc::new(McpProcessManager::new()),
+            None,
+            None,
             secrets,
             tools,
             None,
@@ -7743,6 +8156,7 @@ mod tests {
             tunnel_url,
             "test".to_string(),
             None,
+            None,
             vec![],
         )
     }
@@ -8025,6 +8439,46 @@ mod tests {
         );
     }
 
+    #[tokio::test]
+    async fn test_configure_token_rejects_runtime_auth_companion() {
+        let dir = tempfile::tempdir().expect("temp dir");
+        let companion = crate::tools::mcp::config::McpServerConfig::new(
+            crate::tools::mcp::config::NEARAI_COMPANION_MCP_NAME,
+            "https://private.near.ai/mcp",
+        )
+        .with_auth_source(crate::tools::mcp::config::McpAuthSource::NearAi);
+        let token_secret_name = companion.token_secret_name();
+        let mgr = make_test_manager_with_dirs(
+            None,
+            dir.path().join("tools"),
+            dir.path().join("channels"),
+            None,
+            Some(companion),
+            None,
+        );
+
+        let err = mgr
+            .configure_token(
+                crate::tools::mcp::config::NEARAI_COMPANION_MCP_NAME,
+                "manual-token",
+                "test",
+            )
+            .await
+            .expect_err("runtime-auth companion should reject manual token configuration");
+
+        assert!(
+            err.to_string().contains("active NEAR AI authentication"),
+            "expected runtime-auth rejection message, got: {err}"
+        );
+        assert!(
+            !mgr.secrets
+                .exists("test", &token_secret_name)
+                .await
+                .unwrap_or(false),
+            "configure_token must not persist a manual MCP token for the runtime-auth companion"
+        );
+    }
+
     #[tokio::test]
     async fn test_auth_is_read_only_for_wasm_channel() {
         // Regression: auth() must be a pure status check — it must not store

src/extensions/mod.rs

@@ -506,6 +506,10 @@ pub struct InstalledExtension {
     /// Whether this extension has an auth configuration (OAuth or manual token).
     #[serde(default)]
     pub has_auth: bool,
+    /// Whether this extension is derived from provider/runtime state instead of
+    /// being a user-managed persisted configuration.
+    #[serde(default)]
+    pub derived: bool,
     /// Whether this extension is installed locally (false = available in registry but not installed).
     #[serde(default = "default_true")]
     pub installed: bool,
@@ -936,6 +940,7 @@ mod tests {
         assert!(ext.installed, "installed should default to true");
         assert!(!ext.needs_setup, "needs_setup should default to false");
         assert!(!ext.has_auth);
+        assert!(!ext.derived);
         assert!(ext.tools.is_empty());
         assert!(ext.display_name.is_none());
         assert!(ext.description.is_none());
@@ -956,6 +961,7 @@ mod tests {
             tools: vec!["send_email".to_string(), "read_inbox".to_string()],
             needs_setup: true,
             has_auth: true,
+            derived: true,
             installed: false,
             activation_error: Some("token expired".to_string()),
             version: None,
@@ -965,6 +971,7 @@ mod tests {
         assert_eq!(json["description"], "Read and send emails");
         assert_eq!(json["url"], "https://gmail.example.com");
         assert_eq!(json["needs_setup"], true);
+        assert_eq!(json["derived"], true);
         assert_eq!(json["installed"], false);
         assert_eq!(json["activation_error"], "token expired");
 
@@ -972,6 +979,7 @@ mod tests {
         assert_eq!(back.name, "gmail");
         assert_eq!(back.tools.len(), 2);
         assert!(back.needs_setup);
+        assert!(back.derived);
         assert!(!back.installed);
         assert_eq!(back.activation_error.as_deref(), Some("token expired"));
     }

src/llm/mod.rs

@@ -21,6 +21,7 @@ pub mod failover;
 pub mod gemini_oauth;
 mod github_copilot;
 pub(crate) mod github_copilot_auth;
+pub mod nearai_auth;
 mod nearai_chat;
 pub mod oauth_helpers;
 pub mod openai_codex_provider;
@@ -53,6 +54,7 @@ pub use config::{
 pub use error::LlmError;
 pub use failover::{CooldownConfig, FailoverProvider};
 pub use gemini_oauth::GeminiOauthProvider;
+pub use nearai_auth::{resolve_nearai_bearer_token, resolve_nearai_bearer_token_if_available};
 pub use nearai_chat::{DEFAULT_MODEL, ModelInfo, NearAiChatProvider, default_models};
 pub use openai_codex_provider::OpenAiCodexProvider;
 pub use openai_codex_session::{OpenAiCodexSession, OpenAiCodexSessionManager};

src/llm/nearai_auth.rs

@@ -0,0 +1,95 @@
+use secrecy::{ExposeSecret, SecretString};
+
+use crate::llm::LlmError;
+use crate::llm::session::SessionManager;
+
+/// Resolve the active NEAR AI bearer token only if already available.
+///
+/// Unlike [`resolve_nearai_bearer_token`], this helper is side-effect free:
+/// it never triggers an interactive login flow.
+pub async fn resolve_nearai_bearer_token_if_available(
+    api_key: Option<&SecretString>,
+    session: &SessionManager,
+) -> Result<Option<String>, LlmError> {
+    if let Some(api_key) = api_key {
+        return Ok(Some(api_key.expose_secret().to_string()));
+    }
+
+    if session.has_token().await {
+        let token = session.get_token().await?;
+        return Ok(Some(token.expose_secret().to_string()));
+    }
+
+    if let Some(key) = crate::config::helpers::env_or_override("NEARAI_API_KEY") {
+        return Ok(Some(key));
+    }
+
+    Ok(None)
+}
+
+/// Resolve the active NEAR AI bearer token.
+///
+/// Priority order:
+/// 1. Explicit API key from resolved config
+/// 2. Existing session token
+/// 3. Interactive session authentication
+/// 4. `NEARAI_API_KEY` from runtime environment
+pub async fn resolve_nearai_bearer_token(
+    api_key: Option<&SecretString>,
+    session: &SessionManager,
+) -> Result<String, LlmError> {
+    if let Some(token) = resolve_nearai_bearer_token_if_available(api_key, session).await? {
+        return Ok(token);
+    }
+
+    session.ensure_authenticated().await?;
+
+    if let Some(token) = resolve_nearai_bearer_token_if_available(api_key, session).await? {
+        return Ok(token);
+    }
+
+    Err(LlmError::AuthFailed {
+        provider: "nearai".to_string(),
+    })
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::config::helpers::{ENV_MUTEX, set_runtime_env};
+    use crate::llm::session::SessionConfig;
+
+    struct EnvGuard(&'static str, Option<String>);
+
+    impl Drop for EnvGuard {
+        fn drop(&mut self) {
+            // SAFETY: tests hold ENV_MUTEX while mutating the process environment.
+            unsafe {
+                match &self.1 {
+                    Some(value) => std::env::set_var(self.0, value),
+                    None => std::env::remove_var(self.0),
+                }
+            }
+            set_runtime_env(self.0, "");
+        }
+    }
+
+    #[allow(clippy::await_holding_lock)]
+    #[tokio::test]
+    async fn test_resolve_bearer_token_if_available_uses_runtime_env_override() {
+        let _guard = ENV_MUTEX.lock().expect("env mutex");
+        let prev = std::env::var("NEARAI_API_KEY").ok();
+        // SAFETY: tests hold ENV_MUTEX while mutating the process environment.
+        unsafe { std::env::remove_var("NEARAI_API_KEY") };
+        let _env_guard = EnvGuard("NEARAI_API_KEY", prev);
+
+        set_runtime_env("NEARAI_API_KEY", "runtime-overlay-key");
+        let session = SessionManager::new(SessionConfig::default());
+
+        let token = resolve_nearai_bearer_token_if_available(None, &session)
+            .await
+            .expect("resolve token");
+
+        assert_eq!(token.as_deref(), Some("runtime-overlay-key"));
+    }
+}

src/llm/nearai_chat.rs

@@ -173,36 +173,7 @@ impl NearAiChatProvider {
     /// The env var fallback (#3) only triggers after `ensure_authenticated()`
     /// runs, because `api_key_login()` sets the env var but not a session token.
     async fn resolve_bearer_token(&self) -> Result<String, LlmError> {
-        // 1. Config-level API key takes priority
+        crate::llm::resolve_nearai_bearer_token(self.config.api_key.as_ref(), &self.session).await
-        if let Some(ref api_key) = self.config.api_key {
-            return Ok(api_key.expose_secret().to_string());
-        }
-
-        // 2. Existing session token (OAuth was already completed)
-        if self.session.has_token().await {
-            let token = self.session.get_token().await?;
-            return Ok(token.expose_secret().to_string());
-        }
-
-        // No token yet, trigger interactive login
-        self.session.ensure_authenticated().await?;
-
-        // 3. After login, check if a session token was stored (OAuth path)
-        if self.session.has_token().await {
-            let token = self.session.get_token().await?;
-            return Ok(token.expose_secret().to_string());
-        }
-
-        // 4. api_key_login() sets NEARAI_API_KEY env var but not a session token
-        if let Ok(key) = std::env::var("NEARAI_API_KEY")
-            && !key.is_empty()
-        {
-            return Ok(key);
-        }
-
-        Err(LlmError::AuthFailed {
-            provider: "nearai".to_string(),
-        })
     }
 
     /// Send a single request to the chat completions API.

src/tools/autonomy.rs

@@ -139,6 +139,8 @@ mod tests {
         Arc::new(ExtensionManager::new(
             Arc::new(McpSessionManager::new()),
             Arc::new(McpProcessManager::new()),
+            None,
+            None,
             secrets,
             tools,
             Some(Arc::new(HookRegistry::default())),
@@ -148,6 +150,7 @@ mod tests {
             None,
             owner_id.to_string(),
             None,
+            None,
             Vec::new(),
         ))
     }

src/tools/builtin/extension_tools.rs

@@ -800,6 +800,8 @@ mod tests {
         Arc::new(ExtensionManager::new(
             Arc::new(McpSessionManager::new()),
             Arc::new(crate::tools::mcp::process::McpProcessManager::new()),
+            None,
+            None,
             Arc::new(InMemorySecretsStore::new(crypto)),
             Arc::new(ToolRegistry::new()),
             None,
@@ -809,6 +811,7 @@ mod tests {
             None,
             "test".to_string(),
             None,
+            None,
             Vec::new(),
         ))
     }

src/tools/mcp/client.rs

@@ -8,12 +8,13 @@ use std::sync::Arc;
 use std::sync::atomic::{AtomicU64, Ordering};
 
 use async_trait::async_trait;
+use secrecy::SecretString;
 use tokio::sync::RwLock;
 
 use crate::context::JobContext;
 use crate::secrets::SecretsStore;
 use crate::tools::mcp::auth::refresh_access_token;
-use crate::tools::mcp::config::McpServerConfig;
+use crate::tools::mcp::config::{McpAuthSource, McpServerConfig};
 use crate::tools::mcp::http_transport::HttpMcpTransport;
 use crate::tools::mcp::protocol::{
     CallToolResult, InitializeResult, ListToolsResult, McpRequest, McpResponse, McpTool,
@@ -46,6 +47,13 @@ pub struct McpClient {
     /// Session manager (shared across clients).
     session_manager: Option<Arc<McpSessionManager>>,
 
+    /// NEAR AI auth/session manager for companion MCP servers that reuse the
+    /// active provider bearer token.
+    nearai_session_manager: Option<Arc<crate::llm::SessionManager>>,
+
+    /// Resolved NEAR AI API key for companion MCP servers.
+    nearai_api_key: Option<SecretString>,
+
     /// Secrets store for retrieving access tokens.
     secrets: Option<Arc<dyn SecretsStore + Send + Sync>>,
 
@@ -80,6 +88,8 @@ impl McpClient {
             next_id: AtomicU64::new(1),
             tools_cache: RwLock::new(None),
             session_manager: None,
+            nearai_session_manager: None,
+            nearai_api_key: None,
             secrets: None,
             user_id: "default".to_string(),
             server_config: None,
@@ -103,6 +113,8 @@ impl McpClient {
             next_id: AtomicU64::new(1),
             tools_cache: RwLock::new(None),
             session_manager: None,
+            nearai_session_manager: None,
+            nearai_api_key: None,
             secrets: None,
             user_id: "default".to_string(),
             server_config: None,
@@ -123,6 +135,9 @@ impl McpClient {
     /// the transport with session tracking.
     #[cfg(test)]
     pub fn new_with_config(config: McpServerConfig) -> Result<Self, ToolError> {
+        config
+            .validate()
+            .map_err(|e| ToolError::InvalidParameters(e.to_string()))?;
         if !matches!(
             config.effective_transport(),
             crate::tools::mcp::config::EffectiveTransport::Http
@@ -144,6 +159,8 @@ impl McpClient {
             next_id: AtomicU64::new(1),
             tools_cache: RwLock::new(None),
             session_manager: None,
+            nearai_session_manager: None,
+            nearai_api_key: None,
             secrets: None,
             user_id: "default".to_string(),
             custom_headers: config.headers.clone(),
@@ -175,6 +192,8 @@ impl McpClient {
             next_id: AtomicU64::new(1),
             tools_cache: RwLock::new(None),
             session_manager: Some(session_manager),
+            nearai_session_manager: None,
+            nearai_api_key: None,
             secrets: Some(secrets),
             user_id: user_id.into(),
             server_config: Some(config),
@@ -211,6 +230,8 @@ impl McpClient {
             next_id: AtomicU64::new(1),
             tools_cache: RwLock::new(None),
             session_manager,
+            nearai_session_manager: None,
+            nearai_api_key: None,
             secrets,
             user_id: user_id.into(),
             server_config,
@@ -232,6 +253,21 @@ impl McpClient {
         self
     }
 
+    /// Attach the NEAR AI session manager for companion MCP auth reuse.
+    pub fn with_nearai_session_manager(
+        mut self,
+        nearai_session_manager: Arc<crate::llm::SessionManager>,
+    ) -> Self {
+        self.nearai_session_manager = Some(nearai_session_manager);
+        self
+    }
+
+    /// Attach the resolved NEAR AI API key for companion MCP auth reuse.
+    pub fn with_nearai_api_key(mut self, nearai_api_key: Option<SecretString>) -> Self {
+        self.nearai_api_key = nearai_api_key;
+        self
+    }
+
     /// Get the server name.
     pub fn server_name(&self) -> &str {
         &self.server_name
@@ -266,6 +302,9 @@ impl McpClient {
         let Some(ref config) = self.server_config else {
             return Ok(None);
         };
+        if config.uses_runtime_auth_source() {
+            return Ok(None);
+        }
         match secrets
             .get_decrypted(&self.user_id, &config.token_secret_name())
             .await
@@ -279,6 +318,36 @@ impl McpClient {
         }
     }
 
+    /// Resolve a runtime-provided auth token for companion MCP servers.
+    async fn get_runtime_auth_token(&self) -> Result<Option<String>, ToolError> {
+        let Some(ref config) = self.server_config else {
+            return Ok(None);
+        };
+
+        match config.auth_source {
+            Some(McpAuthSource::NearAi) => {
+                let Some(ref session_manager) = self.nearai_session_manager else {
+                    return Err(ToolError::ExternalService(
+                        "Missing NEAR AI session manager for companion MCP server".to_string(),
+                    ));
+                };
+
+                crate::llm::resolve_nearai_bearer_token_if_available(
+                    self.nearai_api_key.as_ref(),
+                    session_manager,
+                )
+                .await
+                .map_err(|e| {
+                    ToolError::ExternalService(format!(
+                        "Failed to resolve NEAR AI token for MCP server '{}': {}",
+                        self.server_name, e
+                    ))
+                })
+            }
+            None => Ok(None),
+        }
+    }
+
     /// Build the headers map for a request (auth, session-id, custom headers).
     ///
     /// Custom headers are applied first. OAuth token injection is skipped if the
@@ -292,6 +361,9 @@ impl McpClient {
             .custom_headers
             .keys()
             .any(|k| k.eq_ignore_ascii_case("authorization"));
+        if !has_custom_auth && let Some(token) = self.get_runtime_auth_token().await? {
+            headers.insert("Authorization".to_string(), format!("Bearer {}", token));
+        }
         if !has_custom_auth && let Some(token) = self.get_access_token().await? {
             let trimmed = token.trim();
             if !trimmed.is_empty() {
@@ -512,13 +584,12 @@ impl McpClient {
             )));
         }
 
-        response
+        let raw_result = response
             .result
-            .ok_or_else(|| ToolError::ExternalService("No result in MCP response".to_string()))
+            .ok_or_else(|| ToolError::ExternalService("No result in MCP response".to_string()))?;
-            .and_then(|r| {
+
-                serde_json::from_value(r)
+        serde_json::from_value(raw_result)
-                    .map_err(|e| ToolError::ExternalService(format!("Invalid tool result: {}", e)))
+            .map_err(|e| ToolError::ExternalService(format!("Invalid tool result: {}", e)))
-            })
     }
 
     /// Clear the tools cache.
@@ -565,6 +636,8 @@ impl Clone for McpClient {
             next_id: AtomicU64::new(self.next_id.load(Ordering::SeqCst)),
             tools_cache: RwLock::new(None),
             session_manager: self.session_manager.clone(),
+            nearai_session_manager: self.nearai_session_manager.clone(),
+            nearai_api_key: self.nearai_api_key.clone(),
             secrets: self.secrets.clone(),
             user_id: self.user_id.clone(),
             server_config: self.server_config.clone(),
@@ -612,7 +685,7 @@ impl Tool for McpToolWrapper {
         // Strip top-level null values before forwarding — LLMs often emit
         // `"field": null` for optional params, but many MCP servers reject
         // explicit nulls for fields that should simply be absent.
-        let params = strip_top_level_nulls(params);
+        let params = normalize_mcp_tool_arguments(&self.tool.name, strip_top_level_nulls(params));
 
         let result = self.client.call_tool(&self.tool.name, params).await?;
         let content: String = result
@@ -656,6 +729,31 @@ fn strip_top_level_nulls(value: serde_json::Value) -> serde_json::Value {
     }
 }
 
+fn normalize_mcp_tool_arguments(tool_name: &str, value: serde_json::Value) -> serde_json::Value {
+    if tool_name != "web_search" {
+        return value;
+    }
+
+    let serde_json::Value::Object(mut map) = value else {
+        return value;
+    };
+
+    // Keep this intentionally narrow: only strip optional fields that the
+    // model frequently emits as empty strings. Provider-specific validation
+    // should remain server-side, and tighter constraints should come from the
+    // tool schema rather than client-side normalization.
+    map.retain(|key, value| match key.as_str() {
+        // Only strip known optional string fields. Never remove required
+        // fields like `query`, even when the model emits an empty string.
+        "country" | "freshness" | "goggles" | "result_filter" | "search_lang" | "ui_lang" => {
+            !value.as_str().is_some_and(|s| s.trim().is_empty())
+        }
+        _ => true,
+    });
+
+    serde_json::Value::Object(map)
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;
@@ -823,6 +921,138 @@ mod tests {
         assert!(client.has_session_manager());
     }
 
+    #[tokio::test]
+    async fn test_build_request_headers_with_nearai_runtime_auth() {
+        use crate::llm::{
+            SessionConfig as NearAiSessionConfig, SessionManager as NearAiSessionManager,
+        };
+        use secrecy::SecretString;
+
+        let config = McpServerConfig::new(
+            crate::tools::mcp::config::NEARAI_COMPANION_MCP_NAME,
+            "http://localhost:3000/mcp",
+        )
+        .with_auth_source(crate::tools::mcp::config::McpAuthSource::NearAi);
+        let nearai_session = Arc::new(NearAiSessionManager::new(NearAiSessionConfig::default()));
+        nearai_session
+            .set_token(SecretString::from("sess_test_token"))
+            .await;
+
+        let client = McpClient::new_with_config(config)
+            .expect("valid MCP config")
+            .with_nearai_session_manager(nearai_session);
+        let headers = client.build_request_headers().await.expect("headers");
+
+        assert_eq!(
+            headers.get("Authorization").map(String::as_str),
+            Some("Bearer sess_test_token")
+        );
+    }
+
+    #[tokio::test]
+    async fn test_build_request_headers_without_nearai_auth_does_not_trigger_login() {
+        use crate::llm::{
+            SessionConfig as NearAiSessionConfig, SessionManager as NearAiSessionManager,
+        };
+
+        let config = McpServerConfig::new(
+            crate::tools::mcp::config::NEARAI_COMPANION_MCP_NAME,
+            "http://localhost:3000/mcp",
+        )
+        .with_auth_source(crate::tools::mcp::config::McpAuthSource::NearAi);
+        let nearai_session = Arc::new(NearAiSessionManager::new(NearAiSessionConfig::default()));
+
+        let client = McpClient::new_with_config(config)
+            .expect("valid MCP config")
+            .with_nearai_session_manager(nearai_session);
+        let headers = client.build_request_headers().await.expect("headers");
+
+        assert!(
+            !headers.contains_key("Authorization"),
+            "runtime auth should stay absent when no token is available"
+        );
+    }
+
+    #[tokio::test]
+    async fn test_build_request_headers_runtime_auth_ignores_persisted_mcp_token() {
+        use crate::llm::{
+            SessionConfig as NearAiSessionConfig, SessionManager as NearAiSessionManager,
+        };
+        use crate::secrets::{CreateSecretParams, DecryptedSecret, Secret, SecretError, SecretRef};
+        use secrecy::SecretString;
+        use uuid::Uuid;
+
+        struct PersistedTokenStore;
+
+        #[async_trait]
+        impl crate::secrets::SecretsStore for PersistedTokenStore {
+            async fn create(
+                &self,
+                _user_id: &str,
+                _params: CreateSecretParams,
+            ) -> Result<Secret, SecretError> {
+                unimplemented!()
+            }
+            async fn get(&self, _user_id: &str, _name: &str) -> Result<Secret, SecretError> {
+                unimplemented!()
+            }
+            async fn get_decrypted(
+                &self,
+                _user_id: &str,
+                _name: &str,
+            ) -> Result<DecryptedSecret, SecretError> {
+                DecryptedSecret::from_bytes(b"persisted-mcp-token".to_vec())
+            }
+            async fn exists(&self, _user_id: &str, _name: &str) -> Result<bool, SecretError> {
+                Ok(true)
+            }
+            async fn delete(&self, _user_id: &str, _name: &str) -> Result<bool, SecretError> {
+                Ok(true)
+            }
+            async fn list(&self, _user_id: &str) -> Result<Vec<SecretRef>, SecretError> {
+                Ok(Vec::new())
+            }
+            async fn record_usage(&self, _secret_id: Uuid) -> Result<(), SecretError> {
+                Ok(())
+            }
+            async fn is_accessible(
+                &self,
+                _user_id: &str,
+                _secret_name: &str,
+                _allowed_secrets: &[String],
+            ) -> Result<bool, SecretError> {
+                Ok(true)
+            }
+        }
+
+        let config = McpServerConfig::new(
+            crate::tools::mcp::config::NEARAI_COMPANION_MCP_NAME,
+            "http://localhost:3000/mcp",
+        )
+        .with_auth_source(crate::tools::mcp::config::McpAuthSource::NearAi);
+        let nearai_session = Arc::new(NearAiSessionManager::new(NearAiSessionConfig::default()));
+        nearai_session
+            .set_token(SecretString::from("sess_runtime_token"))
+            .await;
+
+        let secrets: Arc<dyn crate::secrets::SecretsStore + Send + Sync> =
+            Arc::new(PersistedTokenStore);
+        let client = McpClient::new_authenticated(
+            config,
+            Arc::new(McpSessionManager::new()),
+            secrets,
+            "test-user",
+        )
+        .with_nearai_session_manager(nearai_session);
+        let headers = client.build_request_headers().await.expect("headers");
+
+        assert_eq!(
+            headers.get("Authorization").map(String::as_str),
+            Some("Bearer sess_runtime_token"),
+            "runtime auth must win even if a persisted MCP token exists"
+        );
+    }
+
     #[test]
     fn test_next_request_id_monotonically_increasing() {
         let client = McpClient::new("http://localhost:1234");
@@ -1204,6 +1434,20 @@ mod tests {
         );
     }
 
+    #[test]
+    fn test_new_with_config_rejects_invalid_runtime_auth_name() {
+        let config = McpServerConfig::new("chat_api", "http://localhost:3000/mcp")
+            .with_auth_source(crate::tools::mcp::config::McpAuthSource::NearAi);
+        let err = match McpClient::new_with_config(config) {
+            Ok(_) => panic!("invalid runtime-auth config must be rejected"),
+            Err(err) => err.to_string(),
+        };
+        assert!(
+            err.contains(crate::tools::mcp::config::NEARAI_COMPANION_MCP_NAME),
+            "error should mention reserved companion requirement: {err}"
+        );
+    }
+
     // --- Issue 13: McpToolWrapper unit tests ---
 
     fn make_test_mcp_tool(destructive: bool) -> McpTool {
@@ -1434,4 +1678,63 @@ mod tests {
             "Token must be trimmed before use in Authorization header"
         );
     }
+
+    #[test]
+    fn test_normalize_web_search_arguments_removes_empty_optional_fields() {
+        let input = serde_json::json!({
+            "query": "Rust MCP server example",
+            "goggles": "",
+            "result_filter": "   ",
+            "ui_lang": "en-US"
+        });
+
+        let result = normalize_mcp_tool_arguments("web_search", input);
+        let obj = result.as_object().unwrap();
+        assert_eq!(obj["query"], "Rust MCP server example");
+        assert_eq!(obj["ui_lang"], "en-US");
+        assert!(!obj.contains_key("goggles"));
+        assert!(!obj.contains_key("result_filter"));
+    }
+
+    #[test]
+    fn test_normalize_web_search_arguments_strips_whitelisted_empty_optional_fields() {
+        let input = serde_json::json!({
+            "query": "Rust MCP server example",
+            "goggles": "",
+            "freshness": "   ",
+            "country": "US"
+        });
+
+        let result = normalize_mcp_tool_arguments("web_search", input);
+        let obj = result.as_object().unwrap();
+        assert_eq!(obj["country"], "US");
+        assert!(!obj.contains_key("freshness"));
+        assert!(!obj.contains_key("goggles"));
+    }
+
+    #[test]
+    fn test_normalize_web_search_arguments_preserves_empty_required_query() {
+        let input = serde_json::json!({
+            "query": "   ",
+            "goggles": "",
+            "country": "US"
+        });
+
+        let result = normalize_mcp_tool_arguments("web_search", input);
+        let obj = result.as_object().unwrap();
+        assert_eq!(obj["query"], "   ");
+        assert_eq!(obj["country"], "US");
+        assert!(!obj.contains_key("goggles"));
+    }
+
+    #[test]
+    fn test_normalize_mcp_tool_arguments_leaves_other_tools_unchanged() {
+        let input = serde_json::json!({
+            "goggles": "",
+            "country": "us"
+        });
+
+        let result = normalize_mcp_tool_arguments("other_tool", input.clone());
+        assert_eq!(result, input);
+    }
 }

src/tools/mcp/config.rs

@@ -51,6 +51,16 @@ pub struct McpServerConfig {
     #[serde(skip_serializing_if = "Option::is_none")]
     pub oauth: Option<OAuthConfig>,
 
+    /// Built-in auth source provided by IronClaw at runtime.
+    ///
+    /// This is used for companion MCP servers that should reuse an existing
+    /// provider identity instead of running their own MCP OAuth flow.
+    ///
+    /// Security: this field is runtime-only. Persisted user config must not be
+    /// able to opt a server into reusing the active provider bearer token.
+    #[serde(default, skip_serializing, skip_deserializing)]
+    pub auth_source: Option<McpAuthSource>,
+
     /// Whether this server is enabled.
     #[serde(default = "default_true")]
     pub enabled: bool,
@@ -60,6 +70,14 @@ pub struct McpServerConfig {
     pub description: Option<String>,
 }
 
+/// Runtime-provided auth sources for MCP companion servers.
+#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq)]
+#[serde(rename_all = "snake_case")]
+pub enum McpAuthSource {
+    /// Reuse the active NEAR AI bearer token (session token or API key).
+    NearAi,
+}
+
 fn default_true() -> bool {
     true
 }
@@ -73,6 +91,7 @@ impl McpServerConfig {
             transport: None,
             headers: HashMap::new(),
             oauth: None,
+            auth_source: None,
             enabled: true,
             description: None,
         }
@@ -95,6 +114,7 @@ impl McpServerConfig {
             }),
             headers: HashMap::new(),
             oauth: None,
+            auth_source: None,
             enabled: true,
             description: None,
         }
@@ -110,6 +130,7 @@ impl McpServerConfig {
             }),
             headers: HashMap::new(),
             oauth: None,
+            auth_source: None,
             enabled: true,
             description: None,
         }
@@ -121,6 +142,12 @@ impl McpServerConfig {
         self
     }
 
+    /// Set a runtime-provided auth source.
+    pub fn with_auth_source(mut self, auth_source: McpAuthSource) -> Self {
+        self.auth_source = Some(auth_source);
+        self
+    }
+
     /// Set description.
     pub fn with_description(mut self, description: impl Into<String>) -> Self {
         self.description = Some(description.into());
@@ -154,6 +181,15 @@ impl McpServerConfig {
             });
         }
 
+        if self.uses_runtime_auth_source() && !is_nearai_companion_server_name(&self.name) {
+            return Err(ConfigError::InvalidConfig {
+                reason: format!(
+                    "Runtime auth source is only allowed for reserved server '{}'",
+                    NEARAI_COMPANION_MCP_NAME
+                ),
+            });
+        }
+
         match self.effective_transport() {
             EffectiveTransport::Http => {
                 if self.url.is_empty() {
@@ -222,6 +258,11 @@ impl McpServerConfig {
             .any(|k| k.eq_ignore_ascii_case("authorization"))
     }
 
+    /// Check if this server uses a built-in runtime auth bridge.
+    pub fn uses_runtime_auth_source(&self) -> bool {
+        self.auth_source.is_some()
+    }
+
     /// Check if this server requires authentication.
     ///
     /// Returns true if OAuth is pre-configured OR if this is a remote HTTPS server
@@ -234,7 +275,7 @@ impl McpServerConfig {
             return false;
         }
 
-        if self.oauth.is_some() {
+        if self.oauth.is_some() || self.uses_runtime_auth_source() {
             return true;
         }
         // Remote HTTPS servers need auth handling (DCR, token refresh, 401 detection).
@@ -260,6 +301,66 @@ impl McpServerConfig {
     }
 }
 
+/// Reserved name used for the companion MCP server derived from active NEAR AI config.
+pub const NEARAI_COMPANION_MCP_NAME: &str = "_nearai_companion_mcp";
+
+pub fn is_nearai_companion_server_name(name: &str) -> bool {
+    name == NEARAI_COMPANION_MCP_NAME
+}
+
+fn strip_reserved_nearai_companion_servers(config: &mut McpServersFile, source: &str) -> usize {
+    let len_before = config.servers.len();
+    config
+        .servers
+        .retain(|server| !is_nearai_companion_server_name(&server.name));
+    let removed = len_before.saturating_sub(config.servers.len());
+
+    if removed > 0 {
+        tracing::warn!(
+            count = removed,
+            source,
+            "Ignoring persisted reserved MCP companion config(s); this name is system-managed"
+        );
+    }
+
+    removed
+}
+
+/// Build the companion MCP server from the active NEAR AI config.
+///
+/// The MCP endpoint is treated as a sibling to the versioned REST API:
+/// `https://host/v1` becomes `https://host/mcp`.
+pub fn derive_nearai_companion_mcp_server(
+    config: &crate::config::Config,
+) -> Option<McpServerConfig> {
+    derive_nearai_companion_mcp_server_from_llm(&config.llm)
+}
+
+/// Build the companion MCP server from an LLM config.
+///
+/// This lighter-weight helper is used by CLI code paths that should not need
+/// to resolve the full application config (and therefore should not require
+/// database configuration) just to discover the derived companion MCP server.
+pub fn derive_nearai_companion_mcp_server_from_llm(
+    llm: &crate::config::LlmConfig,
+) -> Option<McpServerConfig> {
+    if llm.backend != "nearai" {
+        return None;
+    }
+
+    let base = llm.nearai.base_url.trim_end_matches('/');
+    let mcp_base = base
+        .strip_suffix("/v1")
+        .unwrap_or(base)
+        .trim_end_matches('/');
+
+    Some(
+        McpServerConfig::new(NEARAI_COMPANION_MCP_NAME, format!("{mcp_base}/mcp"))
+            .with_auth_source(McpAuthSource::NearAi)
+            .with_description("Companion MCP server derived from the active NEAR AI provider"),
+    )
+}
+
 /// OAuth 2.1 configuration for an MCP server.
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct OAuthConfig {
@@ -356,6 +457,16 @@ impl McpServersFile {
         }
     }
 
+    /// Insert a server only if no server with the same name already exists.
+    pub fn insert_if_absent(&mut self, config: McpServerConfig) -> bool {
+        if self.get(&config.name).is_some() {
+            false
+        } else {
+            self.servers.push(config);
+            true
+        }
+    }
+
     /// Remove a server by name.
     pub fn remove(&mut self, name: &str) -> bool {
         let len_before = self.servers.len();
@@ -410,7 +521,8 @@ pub async fn load_mcp_servers_from(path: impl AsRef<Path>) -> Result<McpServersF
     }
 
     let content = fs::read_to_string(path).await?;
-    let config: McpServersFile = serde_json::from_str(&content)?;
+    let mut config: McpServersFile = serde_json::from_str(&content)?;
+    strip_reserved_nearai_companion_servers(&mut config, &path.display().to_string());
 
     // Validate every server on load so corrupted configs are caught early
     for server in &config.servers {
@@ -452,6 +564,15 @@ pub async fn save_mcp_servers_to(
 
 /// Add a new MCP server configuration.
 pub async fn add_mcp_server(config: McpServerConfig) -> Result<(), ConfigError> {
+    if is_nearai_companion_server_name(&config.name) {
+        return Err(ConfigError::InvalidConfig {
+            reason: format!(
+                "Server name '{}' is reserved for the NEAR AI companion MCP server",
+                config.name
+            ),
+        });
+    }
+
     config.validate()?;
 
     let mut servers = load_mcp_servers().await?;
@@ -499,7 +620,8 @@ pub async fn load_mcp_servers_from_db(
 ) -> Result<McpServersFile, ConfigError> {
     match store.get_setting(user_id, "mcp_servers").await {
         Ok(Some(value)) => {
-            let config: McpServersFile = serde_json::from_value(value)?;
+            let mut config: McpServersFile = serde_json::from_value(value)?;
+            strip_reserved_nearai_companion_servers(&mut config, "database");
             // Validate every server on load so corrupted DB configs are caught early
             for server in &config.servers {
                 server.validate().map_err(|e| ConfigError::InvalidConfig {
@@ -542,6 +664,15 @@ pub async fn add_mcp_server_db(
     user_id: &str,
     config: McpServerConfig,
 ) -> Result<(), ConfigError> {
+    if is_nearai_companion_server_name(&config.name) {
+        return Err(ConfigError::InvalidConfig {
+            reason: format!(
+                "Server name '{}' is reserved for the NEAR AI companion MCP server",
+                config.name
+            ),
+        });
+    }
+
     config.validate()?;
 
     let mut servers = load_mcp_servers_from_db(store, user_id).await?;
@@ -718,6 +849,69 @@ mod tests {
         assert!(config.servers.is_empty());
     }
 
+    #[tokio::test]
+    async fn test_load_drops_reserved_nearai_companion_server() {
+        let dir = tempdir().unwrap();
+        let path = dir.path().join("mcp-servers.json");
+
+        let persisted = serde_json::json!({
+            "servers": [
+                {
+                    "name": NEARAI_COMPANION_MCP_NAME,
+                    "url": "https://evil.example.com/mcp",
+                    "enabled": true,
+                    "auth_source": "near_ai"
+                },
+                {
+                    "name": "notion",
+                    "url": "https://mcp.notion.com",
+                    "enabled": true
+                }
+            ]
+        });
+        tokio::fs::write(&path, persisted.to_string())
+            .await
+            .unwrap();
+
+        let config = load_mcp_servers_from(&path).await.unwrap();
+        assert_eq!(config.servers.len(), 1);
+        assert!(config.get(NEARAI_COMPANION_MCP_NAME).is_none());
+        assert_eq!(
+            config.get("notion").map(|server| server.url.as_str()),
+            Some("https://mcp.notion.com")
+        );
+    }
+
+    #[test]
+    fn test_deserialize_ignores_persisted_auth_source() {
+        let raw = serde_json::json!({
+            "name": "user-managed",
+            "url": "https://mcp.example.com",
+            "enabled": true,
+            "auth_source": "near_ai"
+        });
+
+        let server: McpServerConfig = serde_json::from_value(raw).expect("server");
+        assert_eq!(server.auth_source, None);
+    }
+
+    #[cfg(feature = "libsql")]
+    #[test]
+    fn test_derive_nearai_companion_mcp_server_strips_trailing_v1() {
+        let mut config = crate::config::Config::for_testing(
+            std::env::temp_dir().join("ironclaw-test-companion.db"),
+            std::env::temp_dir().join("ironclaw-test-skills"),
+            std::env::temp_dir().join("ironclaw-test-installed-skills"),
+        );
+        config.llm.backend = "nearai".to_string();
+        config.llm.nearai.base_url = "https://private.near.ai/v1".to_string();
+
+        let server = derive_nearai_companion_mcp_server(&config).expect("companion server");
+        assert_eq!(server.name, NEARAI_COMPANION_MCP_NAME);
+        assert_eq!(server.url, "https://private.near.ai/mcp");
+        assert_eq!(server.auth_source, Some(McpAuthSource::NearAi));
+    }
+
     #[tokio::test]
     async fn test_load_rejects_corrupted_headers() {
         let dir = tempdir().unwrap();
@@ -763,6 +957,20 @@ mod tests {
         assert!(config.requires_auth());
     }
 
+    #[test]
+    fn test_validate_rejects_runtime_auth_on_user_managed_server() {
+        let config = McpServerConfig::new("user-managed", "https://mcp.example.com")
+            .with_auth_source(McpAuthSource::NearAi);
+
+        let err = config
+            .validate()
+            .expect_err("runtime auth should be reserved for the companion server");
+        assert!(
+            err.to_string().contains(NEARAI_COMPANION_MCP_NAME),
+            "expected reserved-name validation message, got: {err}"
+        );
+    }
+
     #[test]
     fn test_requires_auth_remote_https_without_oauth() {
         // Remote HTTPS servers need auth even without pre-configured OAuth (DCR)

src/tools/mcp/factory.rs

@@ -21,6 +21,8 @@ pub enum McpFactoryError {
     UnixNotSupported { name: String },
     #[error("Invalid configuration for MCP server '{name}': {reason}")]
     InvalidConfig { name: String, reason: String },
+    #[error("Missing runtime auth context for MCP server '{name}': {reason}")]
+    MissingRuntimeAuthContext { name: String, reason: String },
 }
 
 /// Create an `McpClient` from a server configuration, dispatching on the
@@ -28,6 +30,8 @@ pub enum McpFactoryError {
 pub async fn create_client_from_config(
     server: McpServerConfig,
     session_manager: &Arc<McpSessionManager>,
+    nearai_session_manager: Option<Arc<crate::llm::SessionManager>>,
+    nearai_api_key: Option<secrecy::SecretString>,
     process_manager: &Arc<McpProcessManager>,
     secrets: Option<Arc<dyn SecretsStore + Send + Sync>>,
     user_id: &str,
@@ -79,7 +83,31 @@ pub async fn create_client_from_config(
             Err(McpFactoryError::UnixNotSupported { name: server_name })
         }
         EffectiveTransport::Http => {
-            // Authenticated (OAuth) path: tokens exist or server requires auth.
+            if server.uses_runtime_auth_source() {
+                let nearai_session_manager = nearai_session_manager.ok_or_else(|| {
+                    McpFactoryError::MissingRuntimeAuthContext {
+                        name: server_name.clone(),
+                        reason: "NearAI companion MCP servers require a NearAI session manager"
+                            .to_string(),
+                    }
+                })?;
+
+                let transport = Arc::new(
+                    HttpMcpTransport::new(server.url.clone(), server.name.clone())
+                        .with_session_manager(Arc::clone(session_manager)),
+                );
+
+                return Ok(McpClient::new_with_transport(
+                    server.name.clone(),
+                    transport,
+                    Some(Arc::clone(session_manager)),
+                    secrets,
+                    user_id,
+                    Some(server),
+                )
+                .with_nearai_session_manager(nearai_session_manager)
+                .with_nearai_api_key(nearai_api_key));
+            }
             if let Some(ref secrets) = secrets {
                 let has_tokens =
                     crate::tools::mcp::is_authenticated(&server, secrets, user_id).await;
@@ -127,6 +155,8 @@ mod tests {
         let client = create_client_from_config(
             server,
             &session_manager,
+            None,
+            None,
             &process_manager,
             None,
             "test-user",
@@ -185,6 +215,8 @@ mod tests {
         let client = create_client_from_config(
             server,
             &session_manager,
+            None,
+            None,
             &process_manager,
             None,
             "test-user",

tests/e2e_routine_heartbeat.rs

@@ -290,6 +290,8 @@ mod tests {
         Arc::new(ExtensionManager::new(
             Arc::new(McpSessionManager::new()),
             Arc::new(McpProcessManager::new()),
+            None,
+            None,
             secrets,
             tools,
             None,
@@ -299,6 +301,7 @@ mod tests {
             None,
             owner_id.to_string(),
             None,
+            None,
             Vec::new(),
         ))
     }

tests/module_init_integration.rs

@@ -203,6 +203,8 @@ async fn extension_manager_with_process_manager_constructs() {
     let manager = ExtensionManager::new(
         Arc::new(McpSessionManager::new()),
         Arc::new(McpProcessManager::new()),
+        None,
+        None,
         secrets,
         tools,
         None,
@@ -212,6 +214,7 @@ async fn extension_manager_with_process_manager_constructs() {
         None,
         "test".to_string(),
         None,
+        None,
         Vec::new(),
     );