Documentation

The API is described machine-readably at /openapi.json, with orientation for models at /llms.txt. These pages are the version for people.

Quickstart

From nothing to a delivered email.

API keys, scopes, and what a key can be limited to.

One message, a batch, a schedule, or a template.

Inbound mail, threading, and reading a conversation.

Giving an autonomous caller a sending credential without giving it the keys.

Event delivery, signing, and retries.

What each failure means and whether retrying helps.