188 pages for notifications.

SEP-1730: SDKs Tiering System Model Context Protocol · in the page seps/1730-sdks-tiering-system …tool * Get prompt * Get completion * Get resource template * Receive notifications **What is needed form SDKs maintainers:** implement everything server based on a spec. Spec will look like: * Tool… SEP-2243: HTTP Header Standardization for Streamable HTTP Transport Model Context Protocol · in the page seps/2243-http-standardization …ired For | | - | - | - | | `Mcp-Method` | `method` | All requests and notifications | | `Mcp-Name` | `params.name` or `params.uri` | `tools/call`, `resources/read`, `prompts/get` requests | These hea… 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 …cessing). Standalone server-initiated requests of these types outside notifications **MUST NOT** be implemented. Although not enforced in the current MCP Data Layer, logically these requests **MUST**… SEP-2322: Multi Round-Trip Requests Model Context Protocol · in the page seps/2322-MRTR …l to send this response on an SSE stream following (e.g.) progress notifications. If this incomplete response is sent on an SSE stream, it must be the last message on the SSE stream, just as if… SEP-2549: TTL for List Results Model Context Protocol · in the page seps/2549-TTL-for-list-results …ows clients to cache feature lists and reduce reliance on server-push notifications while remaining fully backward compatible. The `cacheScope` field controls who may cache a response. TTL supplements… SEP-2567: Sessionless MCP via Explicit State Handles Model Context Protocol · in the page seps/2567-sessionless-mcp …oduces `messages/listen` as the delivery channel for server-to-client notifications; subscription lifetime under that model is not re-examined here.) With (1), (2), and (5) handled by other SEPs, thi… SEP-2575: Make MCP Stateless Model Context Protocol · in the page seps/2575-stateless-mcp …uest. **Optional.** If absent, the server **MUST NOT** send any log notifications for this request. The client opts in to log messages by explicitly setting a level. Replaces the `logging/setLevel… SEP-2577: Deprecate Roots, Sampling, and Logging Model Context Protocol · in the page seps/2577-deprecate-roots-sampling-and-logging …es the following core protocol features: * **Roots** (`roots/list`, `notifications/roots/list_changed`) * **Sampling** (`sampling/createMessage`, `ClientCapabilities.tasks.requests.sampling`) * **L… SEP-2663: Tasks Extension Model Context Protocol · in the page seps/2663-tasks-extension …us-specific payload fields and are used by `tasks/get` responses and `notifications/tasks` notifications: ```ts theme={null} /** * A task that is in a normal working state. * Used by tasks/get and… Architecture Model Context Protocol · in the page specification/2024-11-05/architecture/index …Routes protocol messages bidirectionally * Manages subscriptions and notifications * Maintains security boundaries between servers A host application creates and manages multiple clients, with each… Overview Model Context Protocol · in the page specification/2024-11-05/basic/index …ages sent in reply to requests | Must include same ID as request | | `Notifications` | One-way messages with no reply | Must not include an ID | **Responses** are further sub-categorized as either **… Lifecycle Model Context Protocol · in the page specification/2024-11-05/basic/lifecycle …operations: ```json theme={null} { "jsonrpc": "2.0", "method": "notifications/initialized" } ``` * The client **SHOULD NOT** send requests other than [pings](https://modelcontextprotocol.io/s… Messages Model Context Protocol · in the page specification/2024-11-05/basic/messages …sponse **MUST NOT** set both. * Error codes **MUST** be integers. ## Notifications Notifications are sent from the client to the server or vice versa. They do not expect a response. ```typescript t… Cancellation Model Context Protocol · in the page specification/2024-11-05/basic/utilities/cancellation …low When a party wants to cancel an in-progress request, it sends a `notifications/cancelled` notification containing: * The ID of the request to cancel * An optional reason string that can be logge… Progress Model Context Protocol · in the page specification/2024-11-05/basic/utilities/progress …erations through notification messages. Either side can send progress notifications to provide updates about operation status. ## Progress Flow When a party wants to *receive* progress updates for a… Roots Model Context Protocol · in the page specification/2024-11-05/client/roots …ers can request the list of roots from supporting clients and receive notifications when that list changes. ## User Interaction Model Roots in MCP are typically exposed through workspace or project… Prompts Model Context Protocol · in the page specification/2024-11-05/server/prompts …} } } ``` `listChanged` indicates whether the server will emit notifications when the list of available prompts changes. ## Protocol Messages ### Listing Prompts To retrieve available prompt… Resources Model Context Protocol · in the page specification/2024-11-05/server/resources …individual resources. * `listChanged`: whether the server will emit notifications when the list of available resources changes. Both `subscribe` and `listChanged` are optional—servers can support… Tools Model Context Protocol · in the page specification/2024-11-05/server/tools …} } } ``` `listChanged` indicates whether the server will emit notifications when the list of available tools changes. ## Protocol Messages ### Listing Tools To discover available tools, cli… Logging Model Context Protocol · in the page specification/2024-11-05/server/utilities/logging …logging verbosity by setting minimum log levels, with servers sending notifications containing severity levels, optional logger names, and arbitrary JSON-serializable data. ## User Interaction Model… Architecture Model Context Protocol · in the page specification/2025-03-26/architecture/index …Routes protocol messages bidirectionally * Manages subscriptions and notifications * Maintains security boundaries between servers A host application creates and manages multiple clients, with each… Overview Model Context Protocol · in the page specification/2025-03-26/basic/index …code and message at minimum. * Error codes **MUST** be integers. ### Notifications Notifications are sent from the client to the server or vice versa, as a one-way message. The receiver **MUST NOT**… Lifecycle Model Context Protocol · in the page specification/2025-03-26/basic/lifecycle …](https://www.jsonrpc.org/specification#batch), as other requests and notifications are not possible until initialization has completed. This also permits backwards compatibility with prior protocol v… Transports Model Context Protocol · in the page specification/2025-03-26/basic/transports …its standard output (`stdout`). * Messages may be JSON-RPC requests, notifications, responses—or a JSON-RPC [batch](https://www.jsonrpc.org/specification#batch) containing one or more requests an… Cancellation Model Context Protocol · in the page specification/2025-03-26/basic/utilities/cancellation …low When a party wants to cancel an in-progress request, it sends a `notifications/cancelled` notification containing: * The ID of the request to cancel * An optional reason string that can be logge… Progress Model Context Protocol · in the page specification/2025-03-26/basic/utilities/progress …erations through notification messages. Either side can send progress notifications to provide updates about operation status. ## Progress Flow When a party wants to *receive* progress updates for a… Roots Model Context Protocol · in the page specification/2025-03-26/client/roots …ers can request the list of roots from supporting clients and receive notifications when that list changes. ## User Interaction Model Roots in MCP are typically exposed through workspace or project… Prompts Model Context Protocol · in the page specification/2025-03-26/server/prompts …} } } ``` `listChanged` indicates whether the server will emit notifications when the list of available prompts changes. ## Protocol Messages ### Listing Prompts To retrieve available prompt… Resources Model Context Protocol · in the page specification/2025-03-26/server/resources …individual resources. * `listChanged`: whether the server will emit notifications when the list of available resources changes. Both `subscribe` and `listChanged` are optional—servers can support… Tools Model Context Protocol · in the page specification/2025-03-26/server/tools …} } } ``` `listChanged` indicates whether the server will emit notifications when the list of available tools changes. ## Protocol Messages ### Listing Tools To discover available tools, cli… Logging Model Context Protocol · in the page specification/2025-03-26/server/utilities/logging …logging verbosity by setting minimum log levels, with servers sending notifications containing severity levels, optional logger names, and arbitrary JSON-serializable data. ## User Interaction Model… Architecture Model Context Protocol · in the page specification/2025-06-18/architecture/index …Routes protocol messages bidirectionally * Manages subscriptions and notifications * Maintains security boundaries between servers A host application creates and manages multiple clients, with each… Overview Model Context Protocol · in the page specification/2025-06-18/basic/index …code and message at minimum. * Error codes **MUST** be integers. ### Notifications Notifications are sent from the client to the server or vice versa, as a one-way message. The receiver **MUST NOT**… Lifecycle Model Context Protocol · in the page specification/2025-06-18/basic/lifecycle …operations: ```json theme={null} { "jsonrpc": "2.0", "method": "notifications/initialized" } ``` * The client **SHOULD NOT** send requests other than [pings](https://modelcontextprotocol.io/s… Transports Model Context Protocol · in the page specification/2025-06-18/basic/transports …ndard output (`stdout`). * Messages are individual JSON-RPC requests, notifications, or responses. * Messages are delimited by newlines, and **MUST NOT** contain embedded newlines. * The server **MAY*… Cancellation Model Context Protocol · in the page specification/2025-06-18/basic/utilities/cancellation …low When a party wants to cancel an in-progress request, it sends a `notifications/cancelled` notification containing: * The ID of the request to cancel * An optional reason string that can be logge… Progress Model Context Protocol · in the page specification/2025-06-18/basic/utilities/progress …erations through notification messages. Either side can send progress notifications to provide updates about operation status. ## Progress Flow When a party wants to *receive* progress updates for a… Roots Model Context Protocol · in the page specification/2025-06-18/client/roots …ers can request the list of roots from supporting clients and receive notifications when that list changes. ## User Interaction Model Roots in MCP are typically exposed through workspace or project… Schema Reference Model Context Protocol · in the page specification/2025-06-18/schema …raphy"><p>If specified, the caller is requesting out-of-band progress notifications for this request (as represented by notifications/progress). The value of this parameter is an opaque token that wil… Prompts Model Context Protocol · in the page specification/2025-06-18/server/prompts …} } } ``` `listChanged` indicates whether the server will emit notifications when the list of available prompts changes. ## Protocol Messages ### Listing Prompts To retrieve available prompt… Resources Model Context Protocol · in the page specification/2025-06-18/server/resources …individual resources. * `listChanged`: whether the server will emit notifications when the list of available resources changes. Both `subscribe` and `listChanged` are optional—servers can support… Tools Model Context Protocol · in the page specification/2025-06-18/server/tools …} } } ``` `listChanged` indicates whether the server will emit notifications when the list of available tools changes. ## Protocol Messages ### Listing Tools To discover available tools, cli… Logging Model Context Protocol · in the page specification/2025-06-18/server/utilities/logging …logging verbosity by setting minimum log levels, with servers sending notifications containing severity levels, optional logger names, and arbitrary JSON-serializable data. ## User Interaction Model… Architecture Model Context Protocol · in the page specification/2025-11-25/architecture/index …Routes protocol messages bidirectionally * Manages subscriptions and notifications * Maintains security boundaries between servers A host application creates and manages multiple clients, with each… Overview Model Context Protocol · in the page specification/2025-11-25/basic/index …with a `code` and `message`. * Error codes **MUST** be integers. ### Notifications [Notifications](https://modelcontextprotocol.io/specification/2025-11-25/schema.md#jsonrpcnotification) are sent fr… Lifecycle Model Context Protocol · in the page specification/2025-11-25/basic/lifecycle …operations: ```json theme={null} { "jsonrpc": "2.0", "method": "notifications/initialized" } ``` * The client **SHOULD NOT** send requests other than [pings](https://modelcontextprotocol.io/s… Transports Model Context Protocol · in the page specification/2025-11-25/basic/transports …ndard output (`stdout`). * Messages are individual JSON-RPC requests, notifications, or responses. * Messages are delimited by newlines, and **MUST NOT** contain embedded newlines. * The server **MAY*… Cancellation Model Context Protocol · in the page specification/2025-11-25/basic/utilities/cancellation …low When a party wants to cancel an in-progress request, it sends a `notifications/cancelled` notification containing: * The ID of the request to cancel * An optional reason string that can be logge… Progress Model Context Protocol · in the page specification/2025-11-25/basic/utilities/progress …erations through notification messages. Either side can send progress notifications to provide updates about operation status. ## Progress Flow When a party wants to *receive* progress updates for a… Tasks Model Context Protocol · in the page specification/2025-11-25/basic/utilities/tasks …Notification When a task status changes, receivers **MAY** send a [`notifications/tasks/status`](https://modelcontextprotocol.io/specification/2025-11-25/schema#notifications%2Ftasks%2Fstatus) notif…