Cloudmersive Validate
Validates email addresses, phone numbers, VAT numbers, and domain names.
Read docs Updated 2026-06-17
What is Cloudmersive Validate?
Cloudmersive Validate is an API that performs checks on email addresses, phone numbers, VAT numbers, and domain names to determine their validity.
It supports applications that collect or process user contact details, billing information, or online identifiers where data accuracy is required.
What you can build with Cloudmersive Validate
Email verification during user registration
Developers integrate the API into signup flows to confirm email addresses are properly formatted and exist before creating accounts.
Phone number validation for contact databases
Clean and verify phone numbers submitted through forms or imports to ensure they meet formatting standards and reduce invalid entries.
Domain and VAT checks for business onboarding
Validate company domains and VAT numbers when onboarding vendors or clients to confirm legitimacy and compliance.
Get started with Cloudmersive Validate
- 1Sign up at Cloudmersive and obtain an API key
- 2Review the available validation endpoints in the documentation
- 3Make an HTTPS POST request to the desired endpoint with your input data
- 4Include your API key in the request header for authentication
- 5Parse the JSON response to determine if the input is valid
Cloudmersive Validate: pros & cons
Pros
- +Supports multiple validation types in a single service
- +Simple API key authentication
- +Secure HTTPS-only access
- +Confirms both format and real-world existence where applicable
Cons
- –Requires an active internet connection for each check
- –Usage costs apply after free tier limits
- –Existence checks may not cover every edge-case provider
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Frequently asked questions
It checks the validity of email addresses, phone numbers, VAT numbers, and domain names for correct formatting and existence.
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