Box Mount now runs in Vercel Sandbox Vercel released Box Mount in private preview, letting agents running in Vercel Sandbox read and write Box files through standard filesystem operations by syncing a Box folder with a directory inside the sandbox. The integration runs the sync process and agent as separate sandbox users so Box credentials stay isolated from the agent's workspace, and a contract-review example uses AI Gateway to review a synthetic contract and save the review back to Box. Access requires requesting it from Box and following the Box Mount documentation. Box Mount lets agents running in Vercel Sandbox read and write Box files through standard filesystem operations. It syncs a Box folder with a directory inside the sandbox. Unmount before you stop the sandbox, and everything the agent wrote is in Box after the sandbox is deleted. The contract-review example uses AI Gateway to review a synthetic contract in Vercel Sandbox and save the review back to Box. The sync process and agent run as separate sandbox users, keeping the Box credentials separate from the agent's workspace. Box Mount is in private preview. Request access from Box, then follow the Box Mount documentation https://vercel.com/docs/sandbox/ecosystem/box-mount to set it up in Vercel Sandbox.