DirectoryBox Ox
Box Ox
Browser inbox, sending API, webhooks and agent access, all in your own Cloudflare account.

Box Ox gives you a browser inbox, a sending API, signed webhooks, templates and a typed JavaScript SDK. It all runs in your own Cloudflare account on Workers, R2, D1 and Queues.
What it does
- Agent access: an app or an AI agent connects through MCP or an agent API, and you set which mailboxes it can use and how much it can send.
- Cloudflare Access protects the admin side.
Good to know
- It is not one-click. You download a zip, check the checksum and run
pnpm run deploy, or hand the install link to your coding agent. - It needs Cloudflare Access and R2. It runs on your own Workers plan, with no Box Ox subscription.
- The license is not plain open source. The app uses the Functional Source License, which stops you from building a competing product with it. Each version turns MIT after two years. The SDK and CLI are MIT.
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