989 pages for note.

Completion Model Context Protocol · in the page specification/2024-11-05/server/utilities/completion …l} sequenceDiagram participant Client participant Server Note over Client: User types argument Client->>Server: completion/complete Server-->>Client: Completion suggestions N… Logging Model Context Protocol · in the page specification/2024-11-05/server/utilities/logging …l} sequenceDiagram participant Client participant Server Note over Client,Server: Configure Logging Client->>Server: logging/setLevel (info) Server-->>Client: Empty Result No… Architecture Model Context Protocol · in the page specification/2025-03-26/architecture/index …lities Server-->>Client: Respond with supported capabilities Note over Host,Server: Active Session with Negotiated Features loop Client Requests Host->>Client: User- or model-ini… Authorization Model Context Protocol · in the page specification/2025-03-26/basic/authorization ….1 flow for the authorization code grant type, used for user auth. **NOTE**: The following example assumes the MCP server is also functioning as the authorization server. However, the authorization s… Lifecycle Model Context Protocol · in the page specification/2025-03-26/basic/lifecycle …l} sequenceDiagram participant Client participant Server Note over Client,Server: Initialization Phase activate Client Client->>+Server: initialize request Server-->>Client: i… Transports Model Context Protocol · in the page specification/2025-03-26/basic/transports …subprocess deactivate Server Process ``` ## Streamable HTTP > [!NOTE] > > This replaces the [HTTP+SSE > transport](https://modelcontextprotocol.io/specification/2024-11-05/basic/transports.md#ht… Cancellation Model Context Protocol · in the page specification/2025-03-26/basic/utilities/cancellation …lient participant Server Client->>Server: Request (ID: 123) Note over Server: Processing starts Client--)Server: notifications/cancelled (ID: 123) alt Note over Server: Processin… Progress Model Context Protocol · in the page specification/2025-03-26/basic/utilities/progress …sequenceDiagram participant Sender participant Receiver Note over Sender,Receiver: Request with progress token Sender->>Receiver: Method request with progressToken Note over Sen… Roots Model Context Protocol · in the page specification/2025-03-26/client/roots …l} sequenceDiagram participant Server participant Client Note over Server,Client: Discovery Server->>Client: roots/list Client-->>Server: Available roots Note over Server,Cli… Sampling Model Context Protocol · in the page specification/2025-03-26/client/sampling …participant Client participant User participant LLM Note over Server,Client: Server initiates sampling Server->>Client: sampling/createMessage Note over Client,User: Human-i… Prompts Model Context Protocol · in the page specification/2025-03-26/server/prompts …l} sequenceDiagram participant Client participant Server Note over Client,Server: Discovery Client->>Server: prompts/list Server-->>Client: List of prompts Note over Client,S… Resources Model Context Protocol · in the page specification/2025-03-26/server/resources …l} sequenceDiagram participant Client participant Server Note over Client,Server: Resource Discovery Client->>Server: resources/list Server-->>Client: List of resources Note… Tools Model Context Protocol · in the page specification/2025-03-26/server/tools …participant LLM participant Client participant Server Note over Client,Server: Discovery Client->>Server: tools/list Server-->>Client: List of tools Note over Client,LLM:… Completion Model Context Protocol · in the page specification/2025-03-26/server/utilities/completion …l} sequenceDiagram participant Client participant Server Note over Client: User types argument Client->>Server: completion/complete Server-->>Client: Completion suggestions N… Logging Model Context Protocol · in the page specification/2025-03-26/server/utilities/logging …l} sequenceDiagram participant Client participant Server Note over Client,Server: Configure Logging Client->>Server: logging/setLevel (info) Server-->>Client: Empty Result No… Architecture Model Context Protocol · in the page specification/2025-06-18/architecture/index …lities Server-->>Client: Respond with supported capabilities Note over Host,Server: Active Session with Negotiated Features loop Client Requests Host->>Client: User- or model-ini… Authorization Model Context Protocol · in the page specification/2025-06-18/basic/authorization …fc9728)) for guidance on implementation details. Implementors should note that Protected Resource Metadata documents can define multiple authorization servers. The responsibility for selecting which… Lifecycle Model Context Protocol · in the page specification/2025-06-18/basic/lifecycle …l} sequenceDiagram participant Client participant Server Note over Client,Server: Initialization Phase activate Client Client->>+Server: initialize request Server-->>Client: i… Transports Model Context Protocol · in the page specification/2025-06-18/basic/transports …subprocess deactivate Server Process ``` ## Streamable HTTP > [!NOTE] > > This replaces the [HTTP+SSE > transport](https://modelcontextprotocol.io/specification/2024-11-05/basic/transports.md#ht… Cancellation Model Context Protocol · in the page specification/2025-06-18/basic/utilities/cancellation …lient participant Server Client->>Server: Request (ID: 123) Note over Server: Processing starts Client--)Server: notifications/cancelled (ID: 123) alt Note over Server: Processin… Progress Model Context Protocol · in the page specification/2025-06-18/basic/utilities/progress …sequenceDiagram participant Sender participant Receiver Note over Sender,Receiver: Request with progress token Sender->>Receiver: Method request with progressToken Note over Sen… Elicitation Model Context Protocol · in the page specification/2025-06-18/client/elicitation # Elicitation > [!NOTE] > > Elicitation is newly introduced in this version of the MCP specification and its design may evolve in future protocol versions. The Model Context Protocol (MCP) provides… Roots Model Context Protocol · in the page specification/2025-06-18/client/roots …l} sequenceDiagram participant Server participant Client Note over Server,Client: Discovery Server->>Client: roots/list Client-->>Server: Available roots Note over Server,Cli… Sampling Model Context Protocol · in the page specification/2025-06-18/client/sampling …participant Client participant User participant LLM Note over Server,Client: Server initiates sampling Server->>Client: sampling/createMessage Note over Client,User: Human-i… Schema Reference Model Context Protocol · in the page specification/2025-06-18/schema …5-06-18/basic/index#meta">General fields: <code>\_meta</code></a> for notes on <code>\_meta</code> usage.</p> </div></li></ul></div><aside class="tsd-sources"> <p>Inherited from Notification.params</p… Prompts Model Context Protocol · in the page specification/2025-06-18/server/prompts …l} sequenceDiagram participant Client participant Server Note over Client,Server: Discovery Client->>Server: prompts/list Server-->>Client: List of prompts Note over Client,S… Resources Model Context Protocol · in the page specification/2025-06-18/server/resources …l} sequenceDiagram participant Client participant Server Note over Client,Server: Resource Discovery Client->>Server: resources/list Server-->>Client: List of resources Note… Tools Model Context Protocol · in the page specification/2025-06-18/server/tools …participant LLM participant Client participant Server Note over Client,Server: Discovery Client->>Server: tools/list Server-->>Client: List of tools Note over Client,LLM:… Completion Model Context Protocol · in the page specification/2025-06-18/server/utilities/completion …l} sequenceDiagram participant Client participant Server Note over Client: User types argument Client->>Server: completion/complete Server-->>Client: Completion suggestions N… Logging Model Context Protocol · in the page specification/2025-06-18/server/utilities/logging …l} sequenceDiagram participant Client participant Server Note over Client,Server: Configure Logging Client->>Server: logging/setLevel (info) Server-->>Client: Empty Result No… Architecture Model Context Protocol · in the page specification/2025-11-25/architecture/index …lities Server-->>Client: Respond with supported capabilities Note over Host,Server: Active Session with Negotiated Features loop Client Requests Host->>Client: User- or model-ini… Authorization Model Context Protocol · in the page specification/2025-11-25/basic/authorization …fc9728)) for guidance on implementation details. Implementors should note that Protected Resource Metadata documents can define multiple authorization servers. The responsibility for selecting which… Overview Model Context Protocol · in the page specification/2025-11-25/basic/index …/svg+xml` - SVG images (scalable but requires security precautions as noted below) * `image/webp` - WebP images (modern, efficient format) **Security considerations:** Consumers of icon metadata **M… Lifecycle Model Context Protocol · in the page specification/2025-11-25/basic/lifecycle …l} sequenceDiagram participant Client participant Server Note over Client,Server: Initialization Phase activate Client Client->>+Server: initialize request Server-->>Client: i… Transports Model Context Protocol · in the page specification/2025-11-25/basic/transports …subprocess deactivate Server Process ``` ## Streamable HTTP > [!NOTE] > > This replaces the [HTTP+SSE > transport](https://modelcontextprotocol.io/specification/2024-11-05/basic/transports.md#ht… Cancellation Model Context Protocol · in the page specification/2025-11-25/basic/utilities/cancellation …lient participant Server Client->>Server: Request (ID: 123) Note over Server: Processing starts Client--)Server: notifications/cancelled (ID: 123) alt Note over Server: Processin… Progress Model Context Protocol · in the page specification/2025-11-25/basic/utilities/progress …sequenceDiagram participant Sender participant Receiver Note over Sender,Receiver: Request with progress token Sender->>Receiver: Method request with progressToken Note over Sen… Tasks Model Context Protocol · in the page specification/2025-11-25/basic/utilities/tasks # Tasks > [!NOTE] > > Tasks were introduced in version 2025-11-25 of the MCP specification and are currently considered **experimental**. > The design and behavior of tasks may evolve in future proto… Elicitation Model Context Protocol · in the page specification/2025-11-25/client/elicitation …support defaults SHOULD pre-populate form fields with these values. Note that complex nested structures, arrays of objects (beyond enums), and other advanced JSON Schema features are intentionally n… Roots Model Context Protocol · in the page specification/2025-11-25/client/roots …l} sequenceDiagram participant Server participant Client Note over Server,Client: Discovery Server->>Client: roots/list Client-->>Server: Available roots Note over Server,Cli… Sampling Model Context Protocol · in the page specification/2025-11-25/client/sampling …lities": { "sampling": { "context": {} } } } ``` > [!NOTE] > > The `includeContext` parameter values `"thisServer"` and `"allServers"` are > soft-deprecated. Servers **SHOULD** avoid… Schema Reference Model Context Protocol · in the page specification/2025-11-25/schema …5-11-25/basic/index#meta">General fields: <code>\_meta</code></a> for notes on <code>\_meta</code> usage.</p> </div></section> </div> <div class="type"> ### `Role` <div class="tsd-signature"><sp… Prompts Model Context Protocol · in the page specification/2025-11-25/server/prompts …l} sequenceDiagram participant Client participant Server Note over Client,Server: Discovery Client->>Server: prompts/list Server-->>Client: List of prompts Note over Client,S… Resources Model Context Protocol · in the page specification/2025-11-25/server/resources …l} sequenceDiagram participant Client participant Server Note over Client,Server: Resource Discovery Client->>Server: resources/list Server-->>Client: List of resources Note… Tools Model Context Protocol · in the page specification/2025-11-25/server/tools …participant LLM participant Client participant Server Note over Client,Server: Discovery Client->>Server: tools/list Server-->>Client: List of tools Note over Client,LLM:… Completion Model Context Protocol · in the page specification/2025-11-25/server/utilities/completion …l} sequenceDiagram participant Client participant Server Note over Client: User types argument Client->>Server: completion/complete Server-->>Client: Completion suggestions N… Logging Model Context Protocol · in the page specification/2025-11-25/server/utilities/logging …l} sequenceDiagram participant Client participant Server Note over Client,Server: Configure Logging Client->>Server: logging/setLevel (info) Server-->>Client: Empty Result No… Authorization Server Discovery Model Context Protocol · in the page specification/2026-07-28/basic/authorization/authorization-server-discovery …fc9728)) for guidance on implementation details. Implementors should note that Protected Resource Metadata documents can define multiple authorization servers. The responsibility for selecting which… Client Registration Model Context Protocol · in the page specification/2026-07-28/basic/authorization/client-registration …<br/>(Client's HTTPS URL) participant Resource as MCP Server Note over Client,Metadata: Client hosts metadata at<br/>https://app.example.com/oauth/metadata.json User->>Client: Initiates… Authorization Model Context Protocol · in the page specification/2026-07-28/basic/authorization/index …Protocol ([RFC7591](https://datatracker.ietf.org/doc/html/rfc7591)). Note that [Dynamic Client Registration](https://modelcontextprotocol.io/specification/2026-07-28/basic/authorization/client-reg…