Cloudmersive Validate API
Overview
Cloudmersive Validate is a comprehensive validation API that can verify email addresses, phone numbers, VAT numbers, and domain names in a single platform. It combines syntax checks with live DNS and SMTP lookups for accurate real-world validation. A good choice when you need multi-type validation without integrating separate APIs.
Beginner Tip
The free tier gives you 800 API calls per month across all Cloudmersive APIs — start with email validation as it is the most commonly needed feature. Use the /validate/email/address/full endpoint for the most complete check, including disposable detection and SMTP verification.
Available Data
Example Response
{
"message_id": "msg_abc123def456",
"status": "delivered",
"to": "[email protected]",
"subject": "Welcome!",
"timestamp": "2025-01-15T10:30:00Z"
} Field Reference
ValidAddress Overall validation result — true if the address is valid and deliverable UserName The local part of the email address (before the @) Domain The domain portion of the email address IsDisposable Whether the address uses a known disposable email service IsFreeEmailProvider Whether the domain belongs to a free email provider like Gmail or Yahoo SmtpServerResponse Raw SMTP server response message from the deliverability check Implementation Example
const url = "https://cloudmersive.com/validate-api";
// Replace headers or query params with the values required by this API.
const response = await fetch(url, {
headers: {
"X-API-Key": "YOUR_API_KEY"
}
});
if (!response.ok) throw new Error(`Request failed: ${response.status}`);
const data = await response.json();
console.log(data); What Can You Build?
Note: These code examples are AI-generated and unverified. Always refer to the official API documentation for accurate usage.
Common Errors & Troubleshooting
Matrix Score Breakdown
Partially tested on Apr 5, 2026
Technical Specifications
Similar APIs
View All →Email Validation
Abstract API Email Validation checks whether an email address is deliverable, properly formatted, and not from a disposable or spam-trap domain.
ImprovMX
ImprovMX is an email forwarding service with a REST API that lets you programmatically manage domains and forwarding rules — mapping email aliases to real destination addresses.
mailboxlayer
⭐ Beginner's Pickmailboxlayer is an email validation API that checks whether an email address is syntactically correct, has a valid MX record, and is not a disposable address.
MailboxValidator
MailboxValidator performs multi-layered email address validation including syntax checking, DNS/MX record lookup, disposable email detection, and SMTP mailbox verification to help improve email list deliverability.
Mailtrap
Mailtrap provides programmatic access to a service for the safe testing of emails sent from the development and staging environments via REST API.