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URL: http://github.com/modelcontextprotocol/python-sdk/pull/1111/files

t" href="https://github.githubassets.com/assets/code-34e10031edc15af1.css" /> Add streamable HTTP starlette example to Python SDK docs by pamelafox · Pull Request #1111 · modelcontextprotocol/python-sdk · GitHub
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Add streamable HTTP starlette example to Python SDK docs #1111

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ihrpr merged 1 commit into from
Jul 15, 2025
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Add streamable HTTP starlette example to Python SDK docs #1111

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29 changes: 27 additions & 2 deletions README.md
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Expand Up @@ -838,10 +838,35 @@ The streamable HTTP transport supports:

### Mounting to an Existing ASGI Server

> **Note**: SSE transport is being superseded by [Streamable HTTP transport](https://modelcontextprotocol.io/specification/2025-03-26/basic/transports#streamable-http).

By default, SSE servers are mounted at `/sse` and Streamable HTTP servers are mounted at `/mcp`. You can customize these paths using the methods described below.

#### Streamable HTTP servers

The following example shows how to use `streamable_http_app()`, a method that returns a `Starlette` application object.
You can then append additional routes to that application as needed.

```
from starlette.routing import Route

mcp = FastMCP("My App")

app = mcp.streamable_http_app()
# Additional non-MCP routes can be added like so:
# app.router.routes.append(Route("/", endpoint=other_route_function))
```

To customize the route from the default of "/mcp", either specify the `streamable_http_path` option for the `FastMCP` constructor,
or set `FASTMCP_STREAMABLE_HTTP_PATH` environment variable.

Note that in Starlette and FastAPI (which is based on Starlette), the "/mcp" route will redirect to "/mcp/",
so you may need to use "/mcp/" when pointing MCP clients at your servers.

For more information on mounting applications in Starlette, see the [Starlette documentation](https://www.starlette.io/routing/#submounting-routes).

#### SSE servers

> **Note**: SSE transport is being superseded by [Streamable HTTP transport](https://modelcontextprotocol.io/specification/2025-03-26/basic/transports#streamable-http).

You can mount the SSE server to an existing ASGI server using the `sse_app` method. This allows you to integrate the SSE server with other ASGI applications.

```python
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