692 pages for tail.
Titles and paths first, then pages whose text carries it. Each row opens that page as this site last read it.
Logging
Model Context Protocol · in the page
specification/2024-11-05/server/utilities/logging
…| Level | Description | Example Use Case | | - | - | - | | debug | Detailed debugging information | Function entry/exit points | | info | General informational messages | Operation progress updates |…
Authorization
Model Context Protocol · in the page
specification/2025-03-26/basic/authorization
…server, or 2. Present a UI to users that allows them to enter these details, after registering an OAuth client themselves (e.g., through a configuration interface hosted by the server). ### Aut…
Lifecycle
Model Context Protocol · in the page
specification/2025-03-26/basic/lifecycle
…bility * Exchange and negotiate capabilities * Share implementation details The client **MUST** initiate this phase by sending an `initialize` request containing: * Protocol version supported * Clie…
Key Changes
Model Context Protocol · in the page
specification/2025-03-26/changelog
…tocol/specification/tree/main/schema/2025-03-26/schema.ts) for more details. ## Full changelog For a complete list of all changes that have been made since the last protocol revision, [see GitHub](h…
Specification
Model Context Protocol · in the page
specification/2025-03-26/index
…al context and tools into the ecosystem of AI applications. ## Key Details ### Base Protocol * [JSON-RPC](https://www.jsonrpc.org/) message format * Stateful connections * Server and client capabil…
Overview
Model Context Protocol · in the page
specification/2025-03-26/server/index
…POST requests, file writing | Explore these key primitives in more detail below: > [card] [Prompts](https://modelcontextprotocol.io/specification/2025-03-26/server/prompts.md) > [card] [Resources](…
Logging
Model Context Protocol · in the page
specification/2025-03-26/server/utilities/logging
…| Level | Description | Example Use Case | | - | - | - | | debug | Detailed debugging information | Function entry/exit points | | info | General informational messages | Operation progress updates |…
Authorization
Model Context Protocol · in the page
specification/2025-06-18/basic/authorization
…issuing access tokens for use at the MCP server. The implementation details of the authorization server are beyond the scope of this specification. It may be hosted with the resource server or a separ…
Lifecycle
Model Context Protocol · in the page
specification/2025-06-18/basic/lifecycle
…bility * Exchange and negotiate capabilities * Share implementation details The client **MUST** initiate this phase by sending an `initialize` request containing: * Protocol version supported * Clie…
Specification
Model Context Protocol · in the page
specification/2025-06-18/index
…al context and tools into the ecosystem of AI applications. ## Key Details ### Base Protocol * [JSON-RPC](https://www.jsonrpc.org/) message format * Stateful connections * Server and client capabil…
Schema Reference
Model Context Protocol · in the page
specification/2025-06-18/schema
…the error. The value of this member is defined by the sender (e.g. detailed error information, nested errors etc.).</p> </div></li></ul></div></section> </div> <div class="type"> ### `JSONRPCMessa…
Overview
Model Context Protocol · in the page
specification/2025-06-18/server/index
…POST requests, file writing | Explore these key primitives in more detail below: > [card] [Prompts](https://modelcontextprotocol.io/specification/2025-06-18/server/prompts.md) > [card] [Resources](…
Logging
Model Context Protocol · in the page
specification/2025-06-18/server/utilities/logging
…| Level | Description | Example Use Case | | - | - | - | | debug | Detailed debugging information | Function entry/exit points | | info | General informational messages | Operation progress updates |…
Authorization
Model Context Protocol · in the page
specification/2025-11-25/basic/authorization
…issuing access tokens for use at the MCP server. The implementation details of the authorization server are beyond the scope of this specification. It may be hosted with the resource server or a separ…
Lifecycle
Model Context Protocol · in the page
specification/2025-11-25/basic/lifecycle
…bility * Exchange and negotiate capabilities * Share implementation details The client **MUST** initiate this phase by sending an `initialize` request containing: * Protocol version supported * Clie…
Transports
Model Context Protocol · in the page
specification/2025-11-25/basic/transports
…-11-25/basic/security_best_practices.md#session-hijacking) for more details. 2. If an `MCP-Session-Id` is returned by the server during initialization, clients using the Streamable HTTP transport *…
Tasks
Model Context Protocol · in the page
specification/2025-11-25/basic/utilities/tasks
…g the current state (can be present for any status, including error details for failed tasks) * `createdAt`: ISO 8601 timestamp when the task was created * `ttl`: Time in milliseconds from creation be…
Elicitation
Model Context Protocol · in the page
specification/2025-11-25/client/elicitation
…the `url` field in a URL elicitation request (with the restrictions detailed above). ### Identifying the User Servers **MUST NOT** rely on client-provided user identification without server verifica…
Specification
Model Context Protocol · in the page
specification/2025-11-25/index
…al context and tools into the ecosystem of AI applications. ## Key Details ### Base Protocol * [JSON-RPC](https://www.jsonrpc.org/) message format * Stateful connections * Server and client capabil…
Schema Reference
Model Context Protocol · in the page
specification/2025-11-25/schema
…the error. The value of this member is defined by the sender (e.g. detailed error information, nested errors etc.).</p> </div></section> </div> <div class="type"> ### `Icon` <div class="tsd-sig…
Overview
Model Context Protocol · in the page
specification/2025-11-25/server/index
…POST requests, file writing | Explore these key primitives in more detail below: > [card] [Prompts](https://modelcontextprotocol.io/specification/2025-11-25/server/prompts.md) > [card] [Resources](…
Logging
Model Context Protocol · in the page
specification/2025-11-25/server/utilities/logging
…| Level | Description | Example Use Case | | - | - | - | | debug | Detailed debugging information | Function entry/exit points | | info | General informational messages | Operation progress updates |…
Authorization Server Discovery
Model Context Protocol · in the page
specification/2026-07-28/basic/authorization/authorization-server-discovery
…atracker.ietf.org/doc/html/rfc9728)) for guidance on implementation details. Implementors should note that Protected Resource Metadata documents can define multiple authorization servers. The respons…
Client Registration
Model Context Protocol · in the page
specification/2026-07-28/basic/authorization/client-registration
…server, or 2. Present a UI to users that allows them to enter these details, after registering an OAuth client themselves (e.g., through a configuration interface hosted by the server). ## Dyna…
Authorization
Model Context Protocol · in the page
specification/2026-07-28/basic/authorization/index
…issuing access tokens for use at the MCP server. The implementation details of the authorization server are beyond the scope of this specification. It may be hosted with the resource server or a separ…
Authorization Security Considerations
Model Context Protocol · in the page
specification/2026-07-28/basic/authorization/security-considerations
…, authorization servers **MUST** consider the security implications detailed in [OAuth Client ID Metadata Document, Section 6](https://datatracker.ietf.org/doc/html/draft-ietf-oauth-client-id-metadata…
Streamable HTTP
Model Context Protocol · in the page
specification/2026-07-28/basic/transports/streamable-http
…tool's `inputSchema`. See [Tool Definitions][tool-definitions] for details on how to annotate tool parameters. While the use of `x-mcp-header` is optional for servers, clients **MUST** support this…
Elicitation
Model Context Protocol · in the page
specification/2026-07-28/client/elicitation
…the `url` field in a URL elicitation request (with the restrictions detailed above). ### Identifying the User Servers **MUST NOT** rely on client-provided user identification without server verifica…
Specification
Model Context Protocol · in the page
specification/2026-07-28/index
…al context and tools into the ecosystem of AI applications. ## Key Details ### Base Protocol * [JSON-RPC](https://www.jsonrpc.org/) message format * Stateless, self-contained requests * Per-request…
Schema Reference
Model Context Protocol · in the page
specification/2026-07-28/schema
…/basic/index#meta">General fields: <code>\_meta</code></a> for more details.</p> </div></div> </div> <div class="type"> ### `NotificationMetaObject` <div class="tsd-signature"><span class="tsd-s…
Overview
Model Context Protocol · in the page
specification/2026-07-28/server/index
…POST requests, file writing | Explore these key primitives in more detail below: > [card] [Prompts](https://modelcontextprotocol.io/specification/2026-07-28/server/prompts.md) > [card] [Resources](…
Logging
Model Context Protocol · in the page
specification/2026-07-28/server/utilities/logging
…| Level | Description | Example Use Case | | - | - | - | | debug | Detailed debugging information | Function entry/exit points | | info | General informational messages | Operation progress updates |…
Authorization Server Discovery
Model Context Protocol · in the page
specification/draft/basic/authorization/authorization-server-discovery
…atracker.ietf.org/doc/html/rfc9728)) for guidance on implementation details. Implementors should note that Protected Resource Metadata documents can define multiple authorization servers. The respons…
Client Registration
Model Context Protocol · in the page
specification/draft/basic/authorization/client-registration
…server, or 2. Present a UI to users that allows them to enter these details, after registering an OAuth client themselves (e.g., through a configuration interface hosted by the server). ## Dyna…
Authorization
Model Context Protocol · in the page
specification/draft/basic/authorization/index
…issuing access tokens for use at the MCP server. The implementation details of the authorization server are beyond the scope of this specification. It may be hosted with the resource server or a separ…
Authorization Security Considerations
Model Context Protocol · in the page
specification/draft/basic/authorization/security-considerations
…, authorization servers **MUST** consider the security implications detailed in [OAuth Client ID Metadata Document, Section 10](https://datatracker.ietf.org/doc/html/draft-ietf-oauth-client-id-metadat…
Streamable HTTP
Model Context Protocol · in the page
specification/draft/basic/transports/streamable-http
…tool's `inputSchema`. See [Tool Definitions][tool-definitions] for details on how to annotate tool parameters. While the use of `x-mcp-header` is optional for servers, clients **MUST** support this…
Elicitation
Model Context Protocol · in the page
specification/draft/client/elicitation
…the `url` field in a URL elicitation request (with the restrictions detailed above). ### Identifying the User Servers **MUST NOT** rely on client-provided user identification without server verifica…
Specification
Model Context Protocol · in the page
specification/draft/index
…al context and tools into the ecosystem of AI applications. ## Key Details ### Base Protocol * [JSON-RPC](https://www.jsonrpc.org/) message format * Stateless, self-contained requests * Per-request…
Schema Reference
Model Context Protocol · in the page
specification/draft/schema
…/basic/index#meta">General fields: <code>\_meta</code></a> for more details.</p> </div></div> </div> <div class="type"> ### `NotificationMetaObject` <div class="tsd-signature"><span class="tsd-s…
Overview
Model Context Protocol · in the page
specification/draft/server/index
…POST requests, file writing | Explore these key primitives in more detail below: > [card] [Prompts](https://modelcontextprotocol.io/specification/draft/server/prompts.md) > [card] [Resources](https…
Logging
Model Context Protocol · in the page
specification/draft/server/utilities/logging
…| Level | Description | Example Use Case | | - | - | - | | debug | Detailed debugging information | Function entry/exit points | | info | General informational messages | Operation progress updates |…