python-sdk/examples/snippets/servers/streamable_http_host_mounting.py
Tyler Mailman 72a34002aa
fix: add lifespan context manager to StreamableHTTP mounting examples (#1669)
Co-authored-by: TheMailmans <tyler@example.com>
Co-authored-by: Marcelo Trylesinski <marcelotryle@gmail.com>
2025-12-03 22:08:21 +00:00

38 lines
885 B
Python

"""
Example showing how to mount StreamableHTTP server using Host-based routing.
Run from the repository root:
uvicorn examples.snippets.servers.streamable_http_host_mounting:app --reload
"""
import contextlib
from starlette.applications import Starlette
from starlette.routing import Host
from mcp.server.fastmcp import FastMCP
# Create MCP server
mcp = FastMCP("MCP Host App", json_response=True)
@mcp.tool()
def domain_info() -> str:
"""Get domain-specific information"""
return "This is served from mcp.acme.corp"
# Create a lifespan context manager to run the session manager
@contextlib.asynccontextmanager
async def lifespan(app: Starlette):
async with mcp.session_manager.run():
yield
# Mount using Host-based routing
app = Starlette(
routes=[
Host("mcp.acme.corp", app=mcp.streamable_http_app()),
],
lifespan=lifespan,
)