Frequently Asked Questions (FAQ)

AgentMail is an API-first email platform designed specifically for building AI agents that can communicate over email. While traditional email APIs are built for sending one-way notifications, AgentMail is built for two-way conversations, making it easy to create agents that can read, understand, and reply to emails in a thread, just like a human would.

The key difference is our focus on conversational agents. Services like SendGrid are excellent for transactional emails (receipts, password resets) and marketing campaigns. These are done via a GUI. Resend is an API that is great to do those transactional emails as well. BUT AgentMail is built for the unique challenges allowing agents to have 2-way conversation over email, with first-class support for concepts like Threads, Inboxes, and Attachments to manage complex, stateful conversations over email.

Yes, absolutely! While you can get started instantly with an @agentmail.to inbox, we highly recommend setting up your own custom domain for production use. This improves deliverability and ensures emails come from your brand. You can find a complete guide here.

For production applications, Webhooks are the recommended method. They provide real-time notifications and are far more efficient than constantly polling the API for new messages. You can learn how to set them up in our Webhooks Overview.

Use extracted_text or extracted_html on the Message object. AgentMail strips quoted text automatically, so you get only the new reply content.

Email deliverability is a complex topic. We go in depth in our Email Deliverability best practices guide.

Yes! We currently offer official SDKs for Node.js/TypeScript and Python to make integrating with AgentMail as easy as possible. You can find links and information in our API reference.