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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 """
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<title>Multiple MCP Servers Template</title>
<style>
body { font-family: -apple-system, BlinkMacSystemFont, Segoe UI, Roboto, Helvetica, Arial, sans-serif; margin: 2rem; line-height: 1.5; }
code, pre { background: #f6f8fa; padding: 0.2rem 0.4rem; border-radius: 4px; }
a { color: #2563eb; text-decoration: none; }
a:hover { text-decoration: underline; }
.container { max-width: 800px; }
h1 { margin-bottom: 0.5rem; }
.routes { margin-top: 1rem; }
</style>
</head>
<body>
<div class="container">
<h1>Multiple MCP Servers Template</h1>
<p>This FastAPI app demonstrates how to host multiple Model Context Protocol (MCP) servers on a single server instance.</p>
<p>The following MCP servers are mounted under this app:</p>
<ul class="routes">
<li><a href="/echo">/echo</a> — Echo MCP server</li>
<li><a href="/math">/math</a> — Math MCP server</li>
</ul>
<p>Use these routes as sub-apps or as examples for adding more MCP servers.</p>
</div>
</body>
</html>
"""
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)
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