import contextlib from fastapi import FastAPI from fastapi.responses import HTMLResponse from echo_server import mcp as echo_mcp from math_server import mcp as math_mcp import os # Create a combined lifespan to manage both session managers @contextlib.asynccontextmanager async def lifespan(app: FastAPI): async with contextlib.AsyncExitStack() as stack: await stack.enter_async_context(echo_mcp.session_manager.run()) await stack.enter_async_context(math_mcp.session_manager.run()) yield app = FastAPI(lifespan=lifespan) @app.get("/", response_class=HTMLResponse) async def index(): return """ Multiple MCP Servers Template

Multiple MCP Servers Template

This FastAPI app demonstrates how to host multiple Model Context Protocol (MCP) servers on a single server instance.

The following MCP servers are mounted under this app:

/echo — Echo MCP server
/math — Math MCP server

Use these routes as sub-apps or as examples for adding more MCP servers.

""" app.mount("/echo", echo_mcp.streamable_http_app()) app.mount("/math", math_mcp.streamable_http_app()) PORT = os.environ.get("PORT", 10000) if __name__ == "__main__": import uvicorn uvicorn.run(app, host="0.0.0.0", port=PORT)