Documentation
Set up monitoring, connect your AI agent and build on the API.
Getting started
Add a domain, prove you own it, read the first check, choose where alerts go and set up DMARC reports.
AI agents (MCP)
Connect Claude, ChatGPT, Cursor or VS Code. Ten tools, one sign-in, what a connection may do.
REST API & webhooks
Endpoints, authentication, quotas and signed event deliveries with retries.
API reference
Interactive reference generated from the OpenAPI 3.1 spec.
How we check
What each check looks at and how the score is built.
Bulk sender rules
What Google, Yahoo and Microsoft require from senders, and how to meet it.
New features and changes are in the changelog.