Module stdio 

Available on crate feature client only.

Stdio Transport for connecting to MCP server processes.

Communicates with MCP servers via standard input/output using JSON-RPC. This is used to connect to MCP servers that run as child processes.

Architecture

Uses true async I/O with tokio::process for non-blocking communication:

• Separate async tasks for stdin writing and stdout reading
• Pending request tracking with oneshot channels for responses
• No mutex held across I/O operations, enabling concurrent requests

Structs

AsyncStdioTransport

Async-friendly stdio transport with timeout support.

StdioTransportAdapter

Adapter that wraps AsyncStdioTransport and implements McpTransport.

TokioStdioTransport

True async stdio transport using tokio::process.