Edge Realtime SDK

Lightweight client/server for realtime subscriptions, presence, and event push. WebSocket-first.

Long-lived connections with automatic reconnect, backoff, and resume. Token-authenticated; works behind any modern HTTP reverse proxy.

Subscribe to topics with filter expressions. The server pushes only matching events. No long-polling fallback overhead.

Per-channel presence with deterministic ordering and clean disconnect detection. Useful for collaborative apps.