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MachineMail gives AI agents their own email addresses so they can complete workflows that depend on email: signing up for services, waiting for verification codes, and replying to messages.

Connect from an MCP client or use the API. Create an inbox on demand, use a catch-all domain, and wait for incoming mail with wait_for_message.

Email is also untrusted input. MachineMail prepares agent-safe text and attaches a trust report and level to each inbound message, giving your agent context for deciding how to handle it.

If you have already written custom code for AgentMail, you can keep it. MachineMail is a drop-in replacement for the AgentMail API. Swap the base URL and credentials, and bring your existing integration along. We won’t make you write it twice.

Every plan includes unlimited inboxes and a trust report on every message. The free plan includes 3,000 messages per month (up to 100 per day) and support for one custom domain you own. Paid plans start at $9/month.

Point your agent at machinemail.dev/auth.md and ask it to get a sandbox inbox. No signup needed to try it. Send it an email and see what it can do. If you like it, sign up and claim the address within 24 hours to keep it.