WebSocket support is now available for Python Functions

Python applications on Vercel can use a WebSocket connection to exchange messages in both directions between the browser and server. That matters for interactive AI interfaces: the server can send updates while the client continues sending input through the same connection. The announcement includes a Python function that accepts a connection, receives text and sends text back repeatedly.

Support covers both ASGI and WSGI applications, the two Python application interfaces named in the release. This adds a communication mechanism for chat and live collaboration within Python Functions; the example establishes message exchange rather than a complete application.

“Vercel now supports WebSocket connections for Python applications.”

“WebSockets enable bidirectional communication between client- and server-side code, powering real-time features like interactive AI streaming, real-time chat, and multiplayer live collaboration.”

“Both ASGI and WSGI applications are supported, including frameworks like FastAPI, Django, and Flask.”