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session

Compatibility names that outlived the removed v1 session layer (BaseSession).

RequestResponder

Bases: Generic[ReceiveRequestT, SendResultT]

Typing stub for the v1 responder; the SDK never instantiates it.

Source code in src/mcp/shared/session.py 
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class RequestResponder(Generic[ReceiveRequestT, SendResultT]):
    """Typing stub for the v1 responder; the SDK never instantiates it."""

    request_id: RequestId
    request_meta: RequestParamsMeta | None
    request: ReceiveRequestT
    message_metadata: MessageMetadata