POST/v1/email/verify

Email Verifier API

Verify email deliverability with SMTP, MX, disposable and accept-all checks.

Validate any email address in real time. The verifier runs format, MX, and live SMTP checks, detects disposable and role/webmail addresses, flags accept-all and greylisted servers, and returns a deliverability verdict with a 0–100 score, the MX records, and the detected mail provider.

Full Docs Get API Key — Free $5 Credit $0.01 / call

Try it live

Fill in the fields and hit Run to see a real response.

POST/v1/email/verifyverify$0.01/call

Response

Example response — hit "Send Request" to see a live result

{
  "data": {
    "checks": {
      "acceptAll": false,
      "blocked": false,
      "disposable": false,
      "gibberish": false,
      "greylisted": false,
      "mx": true,
      "smtp": true,
      "smtpServer": true,
      "validFormat": true,
      "webmail": false
    },
    "deliverability": "undeliverable",
    "email": "[email protected]",
    "mxRecords": [
      "aspmx.l.google.com",
      "alt1.aspmx.l.google.com",
      "alt2.aspmx.l.google.com",
      "aspmx2.googlemail.com",
      "aspmx3.googlemail.com"
    ],
    "score": 12,
    "smtpProvider": "Google Workspace",
    "sources": [],
    "status": "invalid"
  },
  "ok": true
}

Features

✓

Full check suite in one call

Format, MX, SMTP, disposable, webmail, accept-all, greylisted, and blocked checks all run together and come back as a structured checks object.

✓

Deliverability verdict and score

A single deliverability label (deliverable, risky, undeliverable) plus a 0–100 score make it easy to threshold addresses for sending.

✓

MX records and provider detection

The response lists the domain's MX records and names the mail provider (e.g. Google Workspace), useful for routing and diagnostics.

✓

Catch-all and disposable detection

Explicit accept-all and disposable flags let you handle risky domains and throwaway addresses before they hurt your sender reputation.

Use cases

List Cleaning

Scrub bounce-prone, disposable, and invalid addresses from a mailing list before a send to protect deliverability.

Signup Validation

Verify email addresses at registration to block fake and disposable signups in real time.

Pre-Send Checks

Validate each recipient right before an outbound email to keep bounce rates low.

Quick start

Copy this snippet and start making calls.

const res = await fetch('https://api.yepapi.com/v1/email/verify', {
  method: 'POST',
  headers: {
    'x-api-key': 'YOUR_API_KEY',
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
    "email": "[email protected]"
  }),
});
const data = await res.json();
console.log(data);

The email verification API — SMTP, MX, disposable & accept-all in one call

The Email Verifier API validates deliverability end to end: format, MX, and live SMTP checks, plus disposable, webmail, accept-all, and greylisted detection, returned as a structured checks object with a deliverability verdict, a 0–100 score, the MX records, and the mail provider.

At $0.01 per verification it undercuts ZeroBounce and NeverBounce with no monthly minimums and $5 of free credit. Clean lists, validate signups, and run pre-send checks — then find and enrich contacts with the same API key.

Start making API calls in 30 seconds

$5 free credit on signup. No credit card required. Pay per call.

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What developers say

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“The $5 free credit let us prototype our entire rank tracking feature before committing. No other API does that.”
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Indie Hacker

Frequently asked questions

Each API call costs $0.01. No monthly minimums or subscriptions — you only pay for what you use.

Sign up for a free API key, then send a POST request to /v1/email/verify. Check the code example above for a ready-to-use snippet in JavaScript, cURL, or Python.

YepAPI bundles SEO, AI, and web scraping APIs under one key with no monthly minimums. You get lower per-call pricing, a unified dashboard, and one billing account instead of managing multiple providers.