Two ways in — a step-by-step guide for using UserMails from the dashboard, and a developer reference for the API, SDK, and MCP.
Send from your own domain, verify lists, watch deliverability, and manage suppressions — all from the dashboard. No code required.
Open the user guide
Quickstart with curl, the UserMails SDK (npm), the verify API, signed webhooks, idempotency, the MCP server, and the full API reference.
Open the developer docs
Already using a transactional client? It's a one-line base-URL change — point it at https://api.usermails.com and see the migration guide.