Developer-first REST API
Transparent JSON, predictable credit pricing, and examples in cURL, Python and Node — ship a production integration in minutes.
Verify before you send
Stop wasting sends on invalid or disposable addresses. One-shot API, bulk CSV cleanup, and deep SMTP reachability checks — all from one dashboard. Free plan, no credit card.
Deep SMTP reachability
Go beyond format checks: connect to the actual mailbox to confirm it accepts mail. Spot catch-all and full inboxes your ESP would otherwise bounce on.
Bulk CSV cleaning
Upload a .csv, get verdicts for every row. Clean legacy lists, purge bad leads, and hand marketers a ready-to-send export.