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Audit list quality before you pay for the campaign

Purchased lists are often stale or padded with burners. A validation pass tells you what fraction of a list is even deliverable — before the ESP charges you for the send.

Dead-domain detection via MX: no mailbox, no point

Disposable and role flags estimate real-human share

Deterministic results make list comparisons apples-to-apples

One address per request keeps your provider integrations simple

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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