modelcontextprotocol/python-sdk
Watch
1
0
Fork
You've already forked python-sdk
 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

refactor: move streamable HTTP app creation from FastMCP to lowlevel Server (#1899)

Browse source
This commit is contained in:
Max Isbey 2026-01-19 18:48:04 +01:00 • committed by GitHub
commit 34e66a3812
No known key found for this signature in database
GPG key ID: B5690EEEBB952194
1 changed files with 189 additions and 122 deletions
Download patch file Download diff file Expand all files Collapse all files

24
docs/migration.md
View file

@ -282,7 +282,29 @@ The `ClientSession.read_resource()`, `subscribe_resource()`, and `unsubscribe_re
## New Features
<!-- Add new features below -->
### `streamable_http_app()` available on lowlevel Server
The `streamable_http_app()` method is now available directly on the lowlevel `Server` class, not just `FastMCP`. This allows using the streamable HTTP transport without the FastMCP wrapper.
```python
from mcp.server.lowlevel.server import Server
server = Server("my-server")
# Register handlers...
@server.list_tools()
async def list_tools():
return [...]
# Create a Starlette app for streamable HTTP
app = server.streamable_http_app(
streamable_http_path="/mcp",
json_response=False,
stateless_http=False,
)
```
The lowlevel `Server` also now exposes a `session_manager` property to access the `StreamableHTTPSessionManager` after calling `streamable_http_app()`.
## Need Help?