Integrate email verification directly into your sign-up flows, CRMs, and applications. Stop bad emails before they ever enter your database.
Free tier includes 100 verifications • No credit card required
{
"email": "user@company.com",
"status": "valid",
"score": 98,
"checks": {
"syntax": true,
"mx_records": true,
"smtp_check": true,
"disposable": false,
"role_based": false
},
"reason": "deliverable"
}Every invalid email in your system creates problems. Here's what you're dealing with.
Users sign up with typos or fake emails, then can't receive order confirmations or password resets.
Bots and bad actors flood your system with disposable and fake emails to exploit promotions.
Your CRM fills up with invalid contacts, making segmentation and analytics unreliable.
Support teams waste hours on users who can't be reached. Marketing sends to dead addresses.
Use the API across your entire workflow—from real-time validation to batch processing
Validate emails instantly as users enter them in your signup forms, checkout pages, or lead capture forms. Prevent bad data at the source.
Already have a list? Verify up to 1,000 emails per API call. Perfect for cleaning existing databases, imported contacts, or purchased lists.
Clean contacts on import into your CRM. Validate before syncing from Salesforce, HubSpot, or any system to keep your pipeline healthy.
Verify emails right before sending campaigns. Catch addresses that have gone stale since capture and protect your sender reputation.
Everything you need to integrate email verification quickly and reliably.
Average response time under 50ms. Real-time verification that doesn't slow down your user experience.
Verify up to 1,000 emails in a single API call. Perfect for importing lists or background processing.
256-bit TLS encryption. SOC 2 Type II certified. GDPR compliant. Your data is always protected.
Native libraries for Node.js, Python, Ruby, PHP, Go, and more. Get started in minutes, not hours.
Get 18+ data points per email including deliverability score, domain info, and risk assessment.
Get async results pushed to your server. Perfect for high-volume batch processing without blocking.
Verify an email with a single API call. Our REST API uses standard HTTP methods and returns JSON responses. Choose your language:
const SendSure = require('sendsure');
const client = new SendSure('YOUR_API_KEY');
// Verify a single email
const result = await client.verify('user@example.com');
if (result.status === 'valid') {
console.log('Email is deliverable!');
console.log(`Confidence: ${result.score}%`);
} else {
console.log(`Rejected: ${result.reason}`);
}Developers use SendSure's API across their entire stack
Validate emails during signup before sending confirmation emails.
Clean contact lists on import to keep your CRM data pristine.
Verify customer emails before order confirmation to prevent delivery issues.
Validate leads before adding to drip campaigns for better deliverability.
SendSure's API infrastructure is designed for mission-critical applications. We process millions of verifications daily with enterprise-grade reliability.
Choose the solution that best fits your workflow.