Verify Emails In
Sub-200ms
One REST call verifies emails at signup, checkout, and CRM — blocking bad data with a 99.99% SLA.
100 free monthly checks • 99.99% SLA
"email": "john.smith@enterprise.com"
}
"status": "valid",
"score": 99,
"flags": {
"is_disposable": false
}
}
The Most Accurate Verifier API
Classify 30+ email types in real time and block bad addresses at the source.
Valid Emails
- • Genuine addresses
- • Verified MX records
- • Accept-all domains
- • AI-scored confidence
Invalid Emails
- • Syntax errors & typos
- • No DNS entries
- • Unroutable IPs
- • Mailbox doesn't exist
Threats And Risks
- • Spam traps & honeypots
- • Disposable / temporary
- • Toxic & abuse domains
- • Role-based (admin@, sales@)
Integrate Where It Matters
SendSure fits every touchpoint in your workflow.
Real-Time Form Validation
Validate emails as users type. Bad data never reaches your database.
- Average 200ms response time
- Block fake signups at the source
- Suggest fixes for typos
Common Integration Points
Use the API across your stack.
User Registration
Validate emails at signup, before confirmation.
CRM Import
Clean contact lists on import.
E-Commerce Checkout
Verify emails before order confirmation.
Marketing Automation
Validate leads before drip campaigns.
Integrate In Minutes
Verify emails with one API call over standard HTTP and JSON.
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}`);
}API Service At A Glance
Block bad signups, clean leads, protect reputation.
Validate Instantly
Catch invalid addresses in milliseconds at signup, checkout, or import.
- Blocks disposables & role-based
- Real-time typo correction
Complete SDKs
Native libraries for Node.js, Python, PHP, Ruby, Java, Go, and more.
Geo-Redundant
Global deployment with latency-based routing to the closest server.
- 99.99% Uptime SLA
- ~200ms average response
99% Accuracy
Guaranteed precision
Real-Time
<200ms form checks
Rapid Scale
Auto-scaling infrastructure
Secure
256-bit TLS encryption
Frequently Asked Questions
About the SendSure API.
Status (valid, invalid, risky, unknown), a 0–100 score, reason codes, and flags for disposable, role-based, and catch-all.