Atomic Mail - Email API for AI Agents

Can my AI agent send and receive emails from a custom domain, or only @atomicmail.ai addresses?

Atomic Mail agents can create email identities on @atomicmail.ai domains immediately. Custom domain support is coming soon but not yet available, so if you need your agent to represent a specific company domain, you will have to wait for that feature.

Does Atomic Mail require identity verification or a credit card to create agent email accounts?

No. Atomic Mail requires neither identity verification nor a credit card to set up email identities for agents. The platform uses Proof-of-Work verification and reputation scoring to prevent spam instead, which means legitimate agents can start sending and receiving mail immediately.

How does Atomic Mail's API help an agent recover from errors without human intervention?

Atomic Mail provides plain-language error hints that agents can read and act on autonomously. Rather than cryptic error codes, the API surfaces hints in natural language, which allows LLMs to understand what went wrong and retry or adjust their request without needing human debugging.

What API standards and integration methods does Atomic Mail support for connecting AI agents?

Atomic Mail offers a JSON-based API built on JMAP and REST standards that LLMs can natively understand without complex SDKs. Integration options include direct JMAP API calls, MCP (Model Context Protocol), and AgentSkill, so you can choose the method that fits your agent architecture.