inbox.dog

What is inbox.dog?

Gmail access for your agents without the CASA security audit.

Who is inbox.dog best for?

inbox.dog is best for developers building AI agents that need to send, draft and search Gmail without a CASA audit.

• Agents that send email

  It hands your agent Gmail write scopes through its own verified OAuth app, so the agent can send mail, create drafts and manage labels.

• MCP client users

  It runs as an MCP server, so Claude, Cursor, Windsurf and other MCP clients get Gmail as tools with a few lines of config.

• Developers building on the API

  An npm package handles the OAuth flow and returns raw tokens, and token refresh is automatic, for custom apps and backends.

• Non-technical Gmail users

  The Connect page links a Gmail account with no code or setup, and the stored tokens can be used later with MCP or the API.

How much does inbox.dog cost?

inbox.dog is free and open source: the hosted service costs nothing and needs no card, and you can also run it yourself under the MIT licence.

The pricing page is headed "Free for Now" and lists only the free hosted service. Self-hosting on your own Cloudflare account is also free, but then you need your own Google OAuth credentials and your own CASA audit for Gmail write access in production. Full pricing on inbox.dog. We checked these prices on 28 Sep 2026.

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Is inbox.dog open source?

Yes. inbox.dog's code is public under the MIT licence, so you can read it, change it and run it yourself.

What are the best inbox.dog alternatives?

inbox.dog is an open source alternative to Composio and Nylas.

ComposioFree

Agents connected to 1,500+ apps with auth handled.

NylasFree

Unified email, calendar and contacts APIs, with accounts for agents.

Questions about inbox.dog