Vercel Sandbox now runs Docker natively inside isolated environments. Agents can build containers, install system packages, and modify files without any access to the host system.
The practical use cases are concrete: spin up Redis or Postgres as test dependencies, validate container images before deployment, or preview containerized applications. With persistent sandboxes now GA, Docker installations and pulled images survive across sessions, eliminating repeated setup overhead.
Beyond Docker, sandboxes also now support FUSE filesystem drivers and VPN clients. That combination significantly expands what can be built inside a sandboxed agent workflow. The system specifications documentation details the full technical scope of these privileged process capabilities.
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