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refactor(examples): migrate all HTTP examples to streamable_http_app() (#2291)

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Max Isbey 2026-03-16 11:37:01 +00:00 • committed by GitHub
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6
examples/servers/simple-tool/README.md
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@ -3,14 +3,14 @@ A simple MCP server that exposes a website fetching tool.
## Usage
Start the server using either stdio (default) or SSE transport:
Start the server using either stdio (default) or Streamable HTTP transport:
```bash
# Using stdio transport (default)
uv run mcp-simple-tool
# Using SSE transport on custom port
uv run mcp-simple-tool --transport sse --port 8000
# Using Streamable HTTP transport on custom port
uv run mcp-simple-tool --transport streamable-http --port 8000
```
The server exposes a tool named "fetch" that accepts one required argument:

29
examples/servers/simple-tool/mcp_simple_tool/server.py
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@ -3,7 +3,6 @@ import click
from mcp import types
from mcp.server import Server, ServerRequestContext
from mcp.shared._httpx_utils import create_mcp_http_client
from starlette.requests import Request
async def fetch_website(
@ -51,10 +50,10 @@ async def handle_call_tool(ctx: ServerRequestContext, params: types.CallToolRequ
@click.command()
@click.option("--port", default=8000, help="Port to listen on for SSE")
@click.option("--port", default=8000, help="Port to listen on for HTTP")
@click.option(
"--transport",
type=click.Choice(["stdio", "sse"]),
type=click.Choice(["stdio", "streamable-http"]),
default="stdio",
help="Transport type",
)
@ -65,30 +64,10 @@ def main(port: int, transport: str) -> int:
on_call_tool=handle_call_tool,
)
if transport == "sse":
from mcp.server.sse import SseServerTransport
from starlette.applications import Starlette
from starlette.responses import Response
from starlette.routing import Mount, Route
sse = SseServerTransport("/messages/")
async def handle_sse(request: Request):
async with sse.connect_sse(request.scope, request.receive, request._send) as streams: # type: ignore[reportPrivateUsage]
await app.run(streams[0], streams[1], app.create_initialization_options())
return Response()
starlette_app = Starlette(
debug=True,
routes=[
Route("/sse", endpoint=handle_sse, methods=["GET"]),
Mount("/messages/", app=sse.handle_post_message),
],
)
if transport == "streamable-http":
import uvicorn
uvicorn.run(starlette_app, host="127.0.0.1", port=port)
uvicorn.run(app.streamable_http_app(), host="127.0.0.1", port=port)
else:
from mcp.server.stdio import stdio_server