Transport Layer

Manages communication channels and authentication between clients and servers.It handles connection establishment, message framing, and secure communication between MCP participants.The transport layer abstracts communication details from the protocol layer, enabling the same JSON-RPC 2.0 message format across all transport mechanisms.

Stdio transport

Uses standard input/output streams for direct process communication between local processes on the …

Streamable HTTP transport

Uses HTTP POST for client-to-server messages with optional Server-Sent Events for streaming …

Custom transport

Clients and servers may implement custom transports in a pluggable fashion.