Block Fake Users

UserCheck identifies and blocks fake email addresses.
So you can focus on real users.

Used by

How it works

Get started quickly with a single API call, supporting easy integration across diverse platforms and languages.

Protect User Privacy.: Choose between comprehensive email analysis or domain-only verification to align with data protection requirements.
Scale Effortlessly.: Leverage our robust API architecture designed to handle millions of requests without performance degradation.
Seamless Integration.: Low-latency API optimized for real-time user authentication workflows.

curl  https://api.usercheck.com/domain/example.com

{
    "status": 200,
    "domain": "example.com",
    "mx": false,
    "disposable": false,
    "public_domain": false,
    "did_you_mean": null
}

Stop fake users

Our API informs you in real time whether a user is using a valid email address, allowing you to block unqualified leads.

Block temporary emails: We have years of data that allow us to identify most disposable email addresses, as well as new domains that pop up every day.

Please enter your real email address.

Keep your mailing list clean

Integrating UserCheck in your sign-up flow eliminates the need for later mailing list clean-up, saving costs from bounced emails and improving deliverability.

Email Deliverability

Identify non-work email addresses

UserCheck identifies public email providers like Gmail and Yahoo, allowing you to exclude personal emails from your sign-up process and collect only professional email addresses.

Please enter your work email address.

Try it live

I'm technical

https://api.usercheck.com/domain/mailinator.com

{
    "status": 200,
    "domain": "mailinator.com",
    "mx": true,
    "disposable": true,
    "public_domain": false,
    "did_you_mean": null
}

Domain

mailinator.com

MX Records

Yes

Disposable

Yes

Public email provider

Pricing

Start for free

Free

Perfect for startups and personal projects

$0 /month

Use for free

5,000 requests per month
120 requests per hour

Pro

Ideal for growing businesses and high-traffic sites.

$50 /month

Start for free

500,000 requests per month
10,000 requests per hour
Bulk email validation
Email support

Enterprise

Tailored solutions for enterprise-level operations.

Custom

Contact sales

Unlimited requests per month
Unlimited requests per hour
Bulk email validation
Dedicated account manager
Domain provider visibility
Custom blocklist

Integrations

Quick integration with your favorite tools