Pricing

from $1.00 / 1,000 email checkeds

Email Validation API — Syntax, MX, Disposable, Score

Validate email lists without sending a thing: syntax, DNS/MX existence, disposable-domain detection, role-based and free-provider flags, 0-100 deliverability score. DNS failures are free, never faked.

Pricing

from $1.00 / 1,000 email checkeds

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0.0

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Developer

Larry Johnson

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Monthly active users

2 days ago

Last modified

Email Validation API — clean your lists without sending a thing

Feed it a list, get back a verdict per address: valid / risky / disposable / invalid / unknown, with a 0–100 deliverability score and the exact reasons. No emails are ever sent. Pay per address checked; our own failures are free.

What's checked

Check	Meaning
`syntaxValid`	Structurally a real address
`domainExists` / `hasMx`	DNS says the domain exists and accepts mail (MX, with A fallback)
`disposable`	Throwaway domains incl. their subdomains (mailinator, 10minutemail, yopmail, ...) — covers common providers; obscure ones can slip through
`roleBased`	info@, sales@, admin@ — weak targets for outreach
`freeProvider`	gmail/yahoo/outlook etc. — fine for B2C, weak signal for B2B
`score` + `verdict`	0–100 confidence and the bottom line

Honest by design

No SMTP-handshake theater. From shared cloud IPs, SMTP probing is widely blocked and greylisted — services that claim it from a datacenter are selling you noise. We only run checks that are trustworthy from where this actually runs.
DNS failures are never faked. If our resolver times out, you get verdict: "unknown" with dnsError set — and that row is not billed. A timeout is our problem, not proof your lead is bad.
Batched delivery: results are pushed and billed every 250 rows, so even an interrupted run delivers what it completed — never all-or-nothing.
Dedup-friendly: domain lookups are cached per run, so 5,000 @gmail.com rows cost one DNS query.

Typical uses

Clean a lead list before a campaign (bounces kill sender reputation), validate signups at the edge, or audit a purchased list before you pay for it twice.

Output example

{
  "email": "jane.doe@gmail.com",
  "verdict": "valid",
  "score": 100,
  "syntaxValid": true, "domainExists": true, "hasMx": true,
  "disposable": false, "roleBased": false, "freeProvider": true
}

Built by the maker of the whale-tracking and MCP suite — same rules everywhere: fail-loud integrity, errors never billed.

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