165 pages for signal.

Cancellation Model Context Protocol · in the page specification/2026-07-28/basic/patterns/cancellation …ellation" } } ``` ## Transport-Specific Cancellation How a client signals cancellation depends on the transport: * **Streamable HTTP**: Closing the SSE response stream is the cancellation signal.… Subscriptions Model Context Protocol · in the page specification/2026-07-28/basic/patterns/subscriptions …it **SHOULD** send a successful `subscriptions/listen` response to signal a graceful end (see [Graceful Closure](#graceful-closure)), then close the stream. * The underlying transport closes (HTT… Overview Model Context Protocol · in the page specification/2026-07-28/basic/transports/index …request metadata is carried, and how cancellation and termination are signaled. It does not define what the messages mean: the [message patterns](/specification/2026-07-28/basic/patterns.md) are part… stdio Model Context Protocol · in the page specification/2026-07-28/basic/transports/stdio …lates from [`SIGTERM`][sigterm] to `SIGKILL`. On Windows, where POSIX signals are not available, clients can use [`TerminateProcess`][terminateprocess] or [Job Objects][job-objects]. Servers **SHOULD… Streamable HTTP Model Context Protocol · in the page specification/2026-07-28/basic/transports/streamable-http …le HTTP, closing the SSE response stream is itself the cancellation > signal and no `notifications/cancelled` message is expected (see > \[Cancellation]\[cancellation]). The notification rules above d… Key Changes Model Context Protocol · in the page specification/2026-07-28/changelog …y retrying the original request, so a server-initiated completion signal — and the identifier used to correlate it — no longer fit the protocol. Servers needing to correlate an elicitation… Schema Reference Model Context Protocol · in the page specification/2026-07-28/schema …quest that requires a client capability the client did not declare is signalled instead by <a href="#missingrequiredclientcapabilityerror" class="tsd-kind-interface">MissingRequiredClientCapabilityErr… Caching Model Context Protocol · in the page specification/2026-07-28/server/utilities/caching …tifications, and the notification acts as an immediate invalidation signal. When a relevant notification is received while a cached response is still fresh, the notification **invalidates** the cac… Cancellation Model Context Protocol · in the page specification/draft/basic/patterns/cancellation …ellation" } } ``` ## Transport-Specific Cancellation How a client signals cancellation depends on the transport: * **Streamable HTTP**: Closing the SSE response stream is the cancellation signal.… Subscriptions Model Context Protocol · in the page specification/draft/basic/patterns/subscriptions …it **SHOULD** send a successful `subscriptions/listen` response to signal a graceful end (see [Graceful Closure](#graceful-closure)), then close the stream. * The underlying transport closes (HTT… Overview Model Context Protocol · in the page specification/draft/basic/transports/index …request metadata is carried, and how cancellation and termination are signaled. It does not define what the messages mean: the [message patterns](/specification/draft/basic/patterns.md) are part of th… stdio Model Context Protocol · in the page specification/draft/basic/transports/stdio …lates from [`SIGTERM`][sigterm] to `SIGKILL`. On Windows, where POSIX signals are not available, clients can use [`TerminateProcess`][terminateprocess] or [Job Objects][job-objects]. Servers **SHOULD… Streamable HTTP Model Context Protocol · in the page specification/draft/basic/transports/streamable-http …le HTTP, closing the SSE response stream is itself the cancellation > signal and no `notifications/cancelled` message is expected (see > \[Cancellation]\[cancellation]). The notification rules above d… Schema Reference Model Context Protocol · in the page specification/draft/schema …quest that requires a client capability the client did not declare is signalled instead by <a href="#missingrequiredclientcapabilityerror" class="tsd-kind-interface">MissingRequiredClientCapabilityErr… Caching Model Context Protocol · in the page specification/draft/server/utilities/caching …tifications, and the notification acts as an immediate invalidation signal. When a relevant notification is received while a cached response is still fresh, the notification **invalidates** the cac…