Awesome Email Validation API for Developers
Easily verify e-mail addresses, and block disposable emails, get an instant JSON response.
Check-Mail.org is a free email validation API that helps developers verify email addresses and block disposable or temporary emails in real-time. It combines blacklists with advanced heuristics to detect fraudulent sign-ups, returning instant JSON responses with risk scores and block recommendations. The free tier includes 1,000 requests per month.
Discover the world's most advanced free e-mail validation service
We might be slightly partial when saying this, but we really DO separate ourselves from the rest.
High uptime and speed
The API has an uptime of over 99.9%, load-balancing across multiple servers, and providing great speed for email validation checks.
Advanced heuristics
We use multiple advanced heuristic methods to detect and block both invalid, disposable emails and temp mail in real-time.
Free API
The email verification API is free to use, with a straightforward model if you need to do more than 1000 requests per month.
User Friendly
All you need to do is a simple GET-request to our API, and receive the reply as JSON. Easy for a programmer to implement!
Real-time validation of your most important metrics, your users.
No matter if you need to clean a list of email addresses for a newsletter, or just want to validate email addresses at signup, making sure you get valid addresses is important.
You can use it to help the user detect a typo in email address when they mistype, or prevent abusive users or spammers by validating the user's email and require a valid email check at user registration.
Frequently Asked Questions
What is email validation?
Email validation is the process of checking whether an email address is real, properly formatted, and able to receive messages. The Check-Mail API verifies MX records, detects disposable and temporary email providers, and returns a risk score.
How does the Check-Mail API work?
Send a GET request with an email address or domain to the Check-Mail API. It checks MX records, runs heuristic detection for disposable emails, and returns a JSON response with validation results, risk score, and a block recommendation.
Is the email validation API free?
Yes. Check-Mail offers a free tier with 1,000 email validation requests per month. No credit card required. Paid plans are available for higher volumes starting at $50/month. See our pricing page for details.
What is a disposable email address?
A disposable email address is a temporary, throwaway email used for one-time sign-ups. These addresses are often used to bypass verification systems and create fake accounts. The Check-Mail API detects and blocks thousands of disposable email providers in real-time. Learn more about disposable email and whether you should block it.
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