One call at signup and typos never make it into your list. Verdicts in plain English, under 400ms, on infrastructure you can build on.
One address in, one verdict out. Built for signup forms and checkout flows.
Send up to 50,000 addresses per call. Poll or webhook when the scrub is done.
Check your balance, set low-balance webhooks, never get surprised mid-campaign.
Granular reasons and raw status codes are in the response too, for the humans who want them.
The API speaks the same language as the dashboard. Three verdicts, a 0–10 score, and a human-readable reason, so your team never argues about what "accept_all_unverifiable" means at 5pm on send day.
Grab a sandbox key, wire it into your signup form, ship it this afternoon. Flip to live when you're ready.