Module protocol 

Structs

JsonRpcError

A JSON-RPC 2.0 error response

JsonRpcNotification

A JSON-RPC 2.0 notification (no id, no response expected)

JsonRpcRequest

A JSON-RPC 2.0 request

JsonRpcResponse

A JSON-RPC 2.0 success response

Enums

JsonRpcMessage

Any message that can be sent/received over the wire

ProgressToken

Progress token — used in notifications/progress

RequestId

A JSON-RPC request ID (string or integer, never null)

Constants

JSONRPC_VERSION

MCP_PROTOCOL_VERSION