Module http 

Streamable HTTP remote transport for MCP (axum + tokio). Streamable HTTP remote transport for MCP.

Exposes an McpServer over HTTP: a single JSON-RPC endpoint (POST /mcp) returning JSON responses, per the Streamable HTTP transport. The server’s Authorization (Bearer) check applies to every request, so a server secured for stdio is secured identically over HTTP.

This is a dual-era endpoint: modern (stateless, _meta-carrying) requests are validated against the standard request headers (MCP-Protocol-Version, Mcp-Method, Mcp-Name) and answered per the 2026-07-28 revision; legacy initialize-handshake requests are served per the negotiated legacy revision with no header requirements.

The transport holds the server behind an Arc (shared across request tasks) and dispatches tools/call via McpServer::call_tool_async, so async handlers work transparently over HTTP.

Requires the mcp-http feature (axum + tokio).

Structs

HttpTransport

Shared MCP server state for the HTTP transport.

Functions

serve

Run the MCP HTTP transport on addr until the server is stopped.