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.
See how SendSure fits into your workflow at every touchpoint
Validate emails the moment users enter them. Instant feedback improves UX and prevents bad data from ever reaching your database.
Clean existing databases or imported lists. Submit up to 1,000 emails per request with async processing for larger volumes.
Connect SendSure to your existing tools. Validate contacts on import, sync, or via automated workflows.
Verify your list right before campaigns. Catch emails 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.
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.
Process millions of verifications with the speed, accuracy, and reliability your applications demand. Our API is designed for mission-critical integrations.
Choose the solution that fits your workflow
Upload CSV files and verify thousands of emails at once. No code required.
Block invalid emails at the point of capture with just 2 lines of code.