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serve_stdio

rmcp_server_kit::transport

Function serve_stdio 

Source 
pub async fn serve_stdio<H>(handler: H) -> Result<(), McpxError>
where
    H: ServerHandler + 'static,
Expand description

Serve an MCP server over stdin/stdout (stdio transport).

§Security warnings

  • No authentication: the parent process has full, unrestricted access.
  • No RBAC: all tools are available regardless of policy.
  • No TLS: messages travel over OS pipes in plaintext.
  • Single client: only the parent process can connect.
  • No Origin validation: not applicable to stdio.

Use this only when the MCP client spawns the server as a trusted subprocess (e.g. Claude Desktop, VS Code Copilot). For network-accessible deployments, use serve() (Streamable HTTP) instead.

§Errors

Returns McpxError::Startup if the handler fails to initialize or the transport disconnects unexpectedly.