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See trial quality in the first request

Trial abuse starts with the email. Validating at signup separates corporate inboxes from burners and role addresses, so activation emails land and abuse surfaces early.

free_provider check separates consumer from business mailboxes

Disposable detection stops trial farming before activation

Deterministic verdicts you can gate on — no opaque ML score

Fits in your existing signup flow: one GET, JSON back

See it work

Live demoreal endpoint

try:

result appears here

That was the real API, no signup needed — free tier is 50 checks/day per IP (resets 00:00 UTC). See the docs for the full reference.

Hook it up

# same endpoint, same verdicts — one GET, no key needed
curl "https://validmail.dev/v1/[email protected]"

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