Cloudflare Sandboxes give AI agents a persistent, isolated environment: a real computer with a shell, a filesystem, and background processes that starts on demand and picks up exactly where it left off.

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Cloudflare Sandboxes and Containers are now generally available, providing AI agents with persistent, isolated compute environments. Key new features include secure credential injection via a programmable egress proxy, PTY support for real terminal sessions over WebSocket, persistent code interpreter contexts (Python/JS/TS) that maintain state across calls like a Jupyter notebook, background processes with live preview URLs, filesystem watching via inotify, and snapshots for fast session restoration stored in R2. Pricing has shifted to active CPU usage only, eliminating charges for idle time. Capacity has also increased significantly, supporting up to 15,000 concurrent lite instances. Figma uses the platform for Figma Make to run untrusted agent code at scale.

Agents have their own computers with Sandboxes GA

Watch the file system and reach immediately