Automation
MachineMail
An email API that gives each AI agent its own inbox and strips hidden instructions from inbound mail.
MachineMail is an email API for AI agents. Each agent gets its own inbox, with no per-inbox fee, over MCP or the API, including custom domains. Every inbound message gets a trust report, and hidden prompt-injection text is stripped before the agent reads it. The free plan includes 3,000 messages a month, 1 GB and 1 domain. Pro is $9 a month.
- Vendor
- MachineMail
- Price
- Free tier, then $9 and up
- Experience
- Advanced
- Platforms
- API
- Last reviewed
- November 4, 2026
- Free tier
- Yes