websockets-sse

To broadcast real-time FastAPI updates across multiple workers, you use a Redis-backed pub/sub layer to relay messages between processes, ensuring all connected clients receive consistent updates regardless of which worker handles their connection.

To keep WebSocket connections alive in FastAPI distributed services, implement a heartbeat mechanism that periodically sends ping messages, preventing idle connections from being closed by proxies or load balancers during long-lived sessions.

Yes, you can use Redis to scale SSE endpoints in FastAPI by leveraging Redis pub/sub to broadcast events across multiple workers, allowing all SSE clients to receive streamed updates consistently across distributed processes.

Yes, you need authentication hooks for FastAPI WebSocket endpoints to validate user identity during the connection handshake, ensuring only authorized clients can establish long-lived real-time connections and receive broadcasted updates securely.

FastAPI WebSocket broadcasts fail with multiple workers because each process maintains isolated connection state, requiring a Redis-backed broadcast layer to synchronize and relay messages across all distributed workers to reach every connected client.