232 pages for timeout.

SEP-1036: URL Mode Elicitation for secure out-of-band interactions Model Context Protocol · in the page seps/1036-url-mode-elicitation-for-secure-out-of-band-intera …should**: * Log security events for audit purposes * Implement timeout mechanisms for elicitation requests * Provide clear error messages for security failures ### Relationship to Existing… SEP-1686: Tasks Model Context Protocol · in the page seps/1686-tasks …rming whether the task was created With server-generated task IDs, a timeout or connection failure creates uncertainty—the client doesn't know whether the task was created, and has no safe way to ret… SEP-1865: MCP Apps - Interactive User Interfaces for MCP Model Context Protocol · in the page seps/1865-mcp-apps-interactive-user-interfaces-for-mcp …type definitions, SDKs, etc.). JSON-RPC offers advanced capabilities (timeouts, errors, etc.). **Alternatives considered:** * **Custom message protocol:** Current MCP-UI approach with message types… SEP-2106: Tools `inputSchema` & `outputSchema` Conform to JSON Schema 2020-12 Model Context Protocol · in the page seps/2106-json-schema-2020-12 …um reject loopback, link-local, and private network addresses), apply timeouts and size limits, and log dereferenced URIs. * Schemas that fail to validate due to an unresolved external `$ref` SHOULD b… SEP-2260: Require Server requests to be associated with a Client request. Model Context Protocol · in the page seps/2260-Require-Server-requests-to-be-associated-with-Client-requests …o-server request that requires that information from the client. ### Timeout Considerations When an MCP Server initiates a "nested" request inside a client request, the duration of the parent reques… SEP-2575: Make MCP Stateless Model Context Protocol · in the page seps/2575-stateless-mcp …ons/cancelled` on STDIO); * the underlying connection is closed (HTTP timeout, TCP disconnect, STDIO process exit); or * the server tears it down (e.g., shutdown), in which case it **MUST** close… SEP-991: Enable URL-based Client Registration using OAuth Client ID Metadata Documents Model Context Protocol · in the page seps/991-enable-url-based-client-registration-using-oauth-c …ominently 2. **SSRF Protection**: Validate URLs, limit response size, timeout requests, rate limit outbound requests ### Best Practices * Only fetch client metadata after authenticating the user * I… Lifecycle Model Context Protocol · in the page specification/2024-11-05/basic/lifecycle …tch * Failure to negotiate required capabilities * Initialize request timeout * Shutdown timeout Implementations **SHOULD** implement appropriate timeouts for all requests, to prevent hung connection… Ping Model Context Protocol · in the page specification/2024-11-05/basic/utilities/ping …"result": {} } ``` 2. If no response is received within a reasonable timeout period, the sender **MAY**: * Consider the connection stale * Terminate the connection * Attempt reconnection pro… Tools Model Context Protocol · in the page specification/2024-11-05/server/tools …ation * Validate tool results before passing to LLM * Implement timeouts for tool calls * Log tool usage for audit purposes Authorization Model Context Protocol · in the page specification/2025-03-26/basic/authorization …curely store third-party credentials 3. Implement appropriate session timeout handling 4. Consider security implications of token chaining 5. Implement proper error handling for third-party auth failu… Lifecycle Model Context Protocol · in the page specification/2025-03-26/basic/lifecycle …utdown is indicated by closing the associated HTTP connection(s). ## Timeouts Implementations **SHOULD** establish timeouts for all sent requests, to prevent hung connections and resource exhaustion… Ping Model Context Protocol · in the page specification/2025-03-26/basic/utilities/ping …"result": {} } ``` 2. If no response is received within a reasonable timeout period, the sender **MAY**: * Consider the connection stale * Terminate the connection * Attempt reconnection pro… Tools Model Context Protocol · in the page specification/2025-03-26/server/tools …ation * Validate tool results before passing to LLM * Implement timeouts for tool calls * Log tool usage for audit purposes Lifecycle Model Context Protocol · in the page specification/2025-06-18/basic/lifecycle …utdown is indicated by closing the associated HTTP connection(s). ## Timeouts Implementations **SHOULD** establish timeouts for all sent requests, to prevent hung connections and resource exhaustion… Ping Model Context Protocol · in the page specification/2025-06-18/basic/utilities/ping …"result": {} } ``` 2. If no response is received within a reasonable timeout period, the sender **MAY**: * Consider the connection stale * Terminate the connection * Attempt reconnection pro… Tools Model Context Protocol · in the page specification/2025-06-18/server/tools …ation * Validate tool results before passing to LLM * Implement timeouts for tool calls * Log tool usage for audit purposes Lifecycle Model Context Protocol · in the page specification/2025-11-25/basic/lifecycle …utdown is indicated by closing the associated HTTP connection(s). ## Timeouts Implementations **SHOULD** establish timeouts for all sent requests, to prevent hung connections and resource exhaustion… Ping Model Context Protocol · in the page specification/2025-11-25/basic/utilities/ping …"result": {} } ``` 2. If no response is received within a reasonable timeout period, the sender **MAY**: * Consider the connection stale * Terminate the connection * Attempt reconnection pro… Tools Model Context Protocol · in the page specification/2025-11-25/server/tools …ation * Validate tool results before passing to LLM * Implement timeouts for tool calls * Log tool usage for audit purposes Overview Model Context Protocol · in the page specification/2026-07-28/basic/index …rs that are purely local to an implementation (for example, a request timeout raised inside an SDK) are not currently assigned codes by this specification. Implementations surfacing local errors in JS… Cancellation Model Context Protocol · in the page specification/2026-07-28/basic/patterns/cancellation …notifications/cancelled` notification referencing the request ID. ## Timeouts Implementations **SHOULD** establish timeouts for all sent requests, to prevent hung connections and resource exhaustion… Subscriptions Model Context Protocol · in the page specification/2026-07-28/basic/patterns/subscriptions …ure)), then close the stream. * The underlying transport closes (HTTP timeout, TCP disconnect, stdio process exit). ### Graceful Closure When the server ends a subscription on its own initiative (… stdio Model Context Protocol · in the page specification/2026-07-28/basic/transports/stdio …er returns any other error, or does not respond within a reasonable timeout: the server is legacy. Fall back to the `initialize` handshake. The fallback **MUST NOT** be keyed to one specific erro… Streamable HTTP Model Context Protocol · in the page specification/2026-07-28/basic/transports/streamable-http …s the connection from being > closed by intermediaries or client idle timeouts during quiet periods when no > notifications are flowing. Per the \[SSE specification]\[sse], any line beginning > with a… Tools Model Context Protocol · in the page specification/2026-07-28/server/tools …s and outputs against `inputSchema` and `outputSchema` * Implement timeouts for tool calls * Log tool usage for audit purposes Overview Model Context Protocol · in the page specification/draft/basic/index …rs that are purely local to an implementation (for example, a request timeout raised inside an SDK) are not currently assigned codes by this specification. Implementations surfacing local errors in JS… Cancellation Model Context Protocol · in the page specification/draft/basic/patterns/cancellation …notifications/cancelled` notification referencing the request ID. ## Timeouts Implementations **SHOULD** establish timeouts for all sent requests, to prevent hung connections and resource exhaustion… Subscriptions Model Context Protocol · in the page specification/draft/basic/patterns/subscriptions …ure)), then close the stream. * The underlying transport closes (HTTP timeout, TCP disconnect, stdio process exit). ### Graceful Closure When the server ends a subscription on its own initiative (… stdio Model Context Protocol · in the page specification/draft/basic/transports/stdio …er returns any other error, or does not respond within a reasonable timeout: the server is legacy. Fall back to the `initialize` handshake. The fallback **MUST NOT** be keyed to one specific erro… Streamable HTTP Model Context Protocol · in the page specification/draft/basic/transports/streamable-http …s the connection from being > closed by intermediaries or client idle timeouts during quiet periods when no > notifications are flowing. Per the \[SSE specification]\[sse], any line beginning > with a… Tools Model Context Protocol · in the page specification/draft/server/tools …s and outputs against `inputSchema` and `outputSchema` * Implement timeouts for tool calls * Log tool usage for audit purposes