Box Mount brings synced files into Vercel Sandbox
Box Mount can sync a Box folder into Vercel Sandbox so an agent works with ordinary files while changes synchronize back to Box. The sync process and agent use separate sandbox users, keeping Box credentials outside the agent’s workspace. The integration is a private preview, and its documented shutdown sequence requires unmounting before stopping the sandbox so writes persist.
Vercel · Oct 28, 2026
Why it matters
Agents working on shared documents need both persistent files and an explicit boundary around storage credentials.
More context
Request preview access from Box. The sample needs a Box developer token and folder, Vercel Sandbox access, an AI Gateway key and Node.js 20 or later. Try disposable documents and verify persistence after unmounting.
Keep in mind
Private-preview access is restricted, and service costs were not verified. Separate users do not by themselves establish that arbitrary agent actions are safe.
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