Free Email Verification API — No Credit Card Required

Most email verification APIs require a credit card even for free tiers. CheckMail1 gives you 300 verifications per day for free — no credit card, no trial expiry.

What You Get for Free

• 300 API calls per day
• Gmail, iCloud, Yahoo, Outlook, QQ, Naver, Proton, Yandex support
• Real-time verification results
• Disposable email detection
• Catch-all domain detection
• No rate limiting on free tier (within daily quota)

Quick Start (60 Seconds)

1. Sign up at checkmail1.com/dashboard — no credit card needed.
2. Copy your API key.
3. Make your first call:

curl 'https://checkmail1.com/api/verify?email=test@gmail.com' \
  -H 'Authorization: Bearer YOUR_API_KEY'

Response:

{{
  "email": "test@gmail.com",
  "valid": true,
  "reason": "deliverable",
  "provider": "gmail",
  "disposable": false,
  "catchAll": false
}}

Upgrade When You Need More