mcpserver

ElicitationResult = TypeAliasType(
    "ElicitationResult",
    AcceptedElicitation[ElicitSchemaModelT]
    | DeclinedElicitation
    | CancelledElicitation,
    type_params=(ElicitSchemaModelT,),
)

Classes

• AcceptedElicitation — Result when user accepts the elicitation.
• AESGCMRequestStateCodec — Built-in codec: AES-256-GCM under key(s) derived with HKDF-SHA256.
• Audio — Helper class for returning audio from tools.
• CancelledElicitation — Result when user cancels the elicitation.
• Context — Context object providing access to MCP capabilities.
• DeclinedElicitation — Result when user declines the elicitation.
• Elicit — A resolver's request to ask the client.
• Extension — Base class for an opt-in MCP extension. Override only the methods you need.
• Icon — An optionally-sized icon for display in a user interface (2025-11-25+).
• Image — Helper class for returning images from tools.
• InvalidRequestState — A sealed requestState token failed verification.
• ListRoots — A resolver's request for the client's roots via roots/list; the framework injects the ListRootsResult.
• MCPServer
• MethodBinding — A new request method an extension serves, e.g. tasks/get.
• RequestStateBoundary — Server middleware sealing/unsealing requestState at the wire boundary.
• RequestStateCodec — Authenticated crypto over the framework's request-state envelope.
• RequestStateSecurity — Policy for protecting requestState: codec, TTL, principal, audience.
• Resolve — Marker for Annotated[T, Resolve(fn)]: fill the parameter by running fn.
• ResourceBinding — A pre-built resource an extension contributes.
• ResourceSecurity — Security policy applied to extracted resource template parameters.
• Sample — A resolver's request to sample the client's LLM via sampling/createMessage.
• ToolBinding — A tool an extension contributes, plus the _meta to stamp on it.

Functions

• authenticated_principal — Default principal binding: the authenticated (client, issuer, subject) identity.
• require_client_extension — Assert the connected client declared support for identifier.

Attributes

• DEFAULT_RESOURCE_SECURITY — Secure-by-default policy: traversal, absolute paths, and null bytes rejected.
• ElicitationResult