Stop Bounces
Before They Happen.
Industry-leading email validation API with multi-layer verification, provider-specific intelligence, and high-performance batch processing.
// 200 OK
{
"email": "john.doe@gmail.com",
"valid": true,
"score": 0.98,
"checks": {
"format": true,
"mx_records": true,
"disposable": false,
"smtp_check": true
},
"details": {
"provider": "google",
"suggestion": null
}
}Power Suite
Everything you need to trust your users.
A comprehensive toolkit designed to clean your lists and protect your sender reputation.
Massive Disposable Shield
Integrated mailchecker with 55,000+ domains. Uses advanced MX-pattern detection to catch burner emails instantly.
Advanced DNS Verification
Real-time SPF & DMARC record checks. We don't just check if the domain exists; we check its reputation.
Smart Normalization
Provider-specific logic for Gmail, Yahoo, and Outlook. Handles dots, tags, and sub-addressing automatically.
Batch Processing
Validate up to 50 emails in a single high-performance request. Perfect for bulk CSV imports or list cleaning.
Security-First
IP-based rate limiting, 'fail-closed' defaults, and DNS timeout protection to keep your infrastructure safe.
Confidence Scoring
Advanced algorithm weighing syntax, DNS, risk factors, and reputation to give a 0-100 trust score.
Try it Live
See how our validation engine processes data in real-time. Enter an email address to run a full audit.
Try these scenarios:
Result:
Confidence Score
0%
Build in minutes, not days.
Drop our API into your existing stack with just a few lines of code.
curl -X POST https://api.fastvalidateapp.com/api/v1/validate \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{"email": "hello@vercel.com"}'Transparent Pricing
Start for free, scale as you grow.
Free
- 10 validations/month
- Basic email validation
- Community support
- Standard rate limits
Basic
- 100 validations/month
- API key access
- Advanced validation
- Email support
- Higher rate limits
Pro
- 10,000 validations/month
- Batch validation
- API key access
- Priority support
- Advanced analytics
- Custom integrations