python-sdk/examples/snippets/servers/streamable_http_multiple_servers.py
Marcelo Trylesinski 8adb5bdce8
refactor: move transport-specific parameters from FastMCP constructor to run() (#1898)
Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
2026-01-16 15:16:20 +00:00

49 lines
1.4 KiB
Python

"""
Example showing how to mount multiple StreamableHTTP servers with path configuration.
Run from the repository root:
uvicorn examples.snippets.servers.streamable_http_multiple_servers:app --reload
"""
import contextlib
from starlette.applications import Starlette
from starlette.routing import Mount
from mcp.server.fastmcp import FastMCP
# Create multiple MCP servers
api_mcp = FastMCP("API Server")
chat_mcp = FastMCP("Chat Server")
@api_mcp.tool()
def api_status() -> str:
"""Get API status"""
return "API is running"
@chat_mcp.tool()
def send_message(message: str) -> str:
"""Send a chat message"""
return f"Message sent: {message}"
# Create a combined lifespan to manage both session managers
@contextlib.asynccontextmanager
async def lifespan(app: Starlette):
async with contextlib.AsyncExitStack() as stack:
await stack.enter_async_context(api_mcp.session_manager.run())
await stack.enter_async_context(chat_mcp.session_manager.run())
yield
# Mount the servers with transport-specific options passed to streamable_http_app()
# streamable_http_path="/" means endpoints will be at /api and /chat instead of /api/mcp and /chat/mcp
app = Starlette(
routes=[
Mount("/api", app=api_mcp.streamable_http_app(json_response=True, streamable_http_path="/")),
Mount("/chat", app=chat_mcp.streamable_http_app(json_response=True, streamable_http_path="/")),
],
lifespan=lifespan,
)