100 free credits · no credit card

The Email Validation API
built for real-time email verification

Syntax, MX, SMTP, disposable, typo detection — in a single REST call. Radically transparent. The most affordable email validation API on the market.

Get started free Try it live
From $0.0025/email · Credits never expire · No fake 99% accuracy

Try our email verification API live

Type any email address and see the real response from our API.

20 demo requests per hour per IP. Sign up for a real API key with 100 free credits.

How our email validation API works

Three steps, one REST call.

1

Get your API key

Sign up for free, 100 credits are waiting in your wallet. Your API key is ready instantly — no approval, no credit card.

2

Make a POST request

Send any email to /api/v1/validate with your Bearer token. Works from any language: PHP, Python, Node.js, Ruby, Go.

3

Use the response

Structured JSON response with a valid boolean, a confidence level, and detailed diagnostics for edge cases.

Drop-in integration

Copy, paste, validate. Our email validation API works the same way from any stack — no SDK required.

Full documentation → 
# Bash / curl
curl https://email-validation-api.net/api/v1/validate \
  -H "Authorization: Bearer evs_live_..." \
  -H "Content-Type: application/json" \
  -d '{"email":"user@example.com"}'
{
  "email": "user@example.com",
  "valid": true,
  "reason": "ok",
  "confidence": "verified",
  "score": 1.0,
  "details": {
    "syntax": true, "mx": true, "smtp": true,
    "disposable": false, "role_based": false
  },
  "credits_remaining": 99940
}

Why developers choose our email verification API

Real SMTP verification

FCrDNS-validated HELO means Gmail, Outlook, iCloud actually accept our probes and return accurate verdicts.

Typo detection

Levenshtein-based suggestion against a self-learning popular domains list — catches gmial.com, yaho.fr, and custom typos your users make.

Disposable filtering

Blocks mailinator, yopmail, tempmail and hundreds of disposable domains — extendable with our auto-updated list.

Anti-probe aware

We tell you when Proton, Tutanota or other providers block probes — no false negatives, honest confidence levels.

Fast response

80-400ms typical, <10ms on cached emails. Transparent rate limit headers so you can pace your traffic.

No subscription lock-in

Pay-as-you-go from $0.0025/email. No monthly commitment, no hidden cost per check. Buy credits when you need them.

Our promise to developers

We don't claim 99% accuracy. Nobody honestly can.

Every other email validation API plasters “99%+ accurate!” on their homepage. It's marketing theatre — and it bites you when their inflated numbers don't match your real bounce rates.

The reality nobody talks about

ProtonMail, Tutanota, strict cPanel servers and countless corporate MX setups actively block email verification probes. No service — not us, not ZeroBounce, not NeverBounce, not Kickbox — can bypass that. There is no silver bullet. Anyone who tells you otherwise is selling fluff.

Our approach: radical transparency

When we can't confirm an email, we tell you exactly why — with precise reason codes like smtp_anti_probe, smtp_catch_all or smtp_silent. You get honest diagnostics instead of a made-up accuracy score. You make informed decisions. Your bounce rate stops surprising you.

What this means in practice

  • Every response ships with a confidence level: verified or basic
  • Cases we couldn't probe are flagged — you decide what to do with them
  • Raw SMTP responses are exposed, so you can build your own logic on top
  • No hidden limitations, no asterisks, no "*accuracy based on internal sampling"
Read the reason codes

Email validation API pricing

The cheapest email validation API you'll find. Pay only for what you use.

$29 deposit
$0.0039
per email
$250 deposit
$0.0033
per email
-15%
$1000 deposit
$0.0029
per email
-26%
$10000 deposit
$0.0025
per email
-36%
See full pricing →

Frequently asked questions

An email validation API is a REST service that verifies whether an email address is syntactically correct, hosted on a domain that can receive mail, and actually reachable at the SMTP level. It helps you clean signup forms, mailing lists, and prevent fake accounts.

Our email verification API performs five checks in parallel: syntax (RFC 5322), DNS MX records, disposable domain filtering, role-based address detection, and real-time SMTP RCPT TO handshake. The response includes a confidence level (verified or basic) and a score you can use to accept or reject the email.

We are 100% pay-as-you-go. Buy credits as you need, minimum $29. 1 credit = 1 email validation. Unit price drops smoothly with volume, from $0.0039 down to $0.0025 per email. No subscription, no minimum commitment, credits never expire. 100 free credits when you sign up.

Yes. We perform real SMTP RCPT TO checks with proper FCrDNS-validated HELO, which Gmail, Outlook, iCloud, and most providers accept. We distinguish existing addresses (verified), rejected (user_unknown / disabled), and unverifiable (anti-probe policy like ProtonMail). Our classification is transparent — you see exactly why an email is validated or not.

Yes. We auto-detect catch-all servers (accepting any RCPT TO) and anti-probe servers (Proton, Tutanota, some cPanel configurations) and clearly flag them with smtp_catch_all or smtp_anti_probe reason codes. You decide how to treat them in your application.

Because no one can, honestly. ProtonMail, Tutanota, strict cPanel servers and many corporate MX setups actively block SMTP verification probes — no service on the market (ours, ZeroBounce, NeverBounce, Kickbox or anyone else) can bypass that. Competitors hide those cases behind inflated accuracy numbers. We prefer to tell you exactly which emails we could verify, which we couldn't, and why. You get honest data instead of marketing fluff.

Typical latency is 80-400ms per email, with intelligent caching via Redis. Repeated validations of the same email within 1 hour return in under 10ms. For bulk validation we recommend using the async batch endpoint (coming soon).

Yes. It is a standard REST API with Authorization Bearer authentication. We provide copy-paste examples for PHP, Python, Node.js, Ruby, and Go. Any HTTP client will work.

No. Your credits never expire. Buy them once, use them whenever you need. No pressure, no clock, no expiration date.

Start verifying emails now

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