Cloudflare Durable Objects Has a Free API You Should Know About

Cloudflare Durable Objects provide strongly consistent, stateful storage at the edge. Each object has its own storage and can handle WebSocket connections — perfect for real-time collaboration. Why Durable Objects for Real-Time A team building collaborative document editing needed strong consistency — multiple users editing the same document simultaneously. Traditional databases added latency. Durable Objects run at the edge with built-in WebSocket support and transactional storage. Key Features: Strong Consistency — Single-threaded execution per object WebSocket Support — Built-in real-time connections Transactional Storage — ACID transactions per object Global Placement — Object migrates near its users Hibernation — Objects sleep when idle, wake on request Quick Start export class ChatRoom { state : DurableObjectState sessions : WebSocket [] = [] constructor ( state : DurableObjectState ) { this . state = state } async fetch ( request : Request ) { const [ client , server ] = Object