Trusted by thousands of developers, from startup to enterprise
UserCheck identifies and blocks fake email addresses.
So you can focus on real users.
UserCheck took 10 mins to set up and eliminated 90% of fake sign-ups. No more temporary emails getting through - we've saved countless hours and dollars by keeping our user base legitimate.
The email data you need to take action
{"disposable": true}
Block
Disposable email detection
Automatically identify and block disposable emails with our always up-to-date database of providers
{"relay_domain": true}
{"provider": proton.me}
Ask for real email
Email forwarding detection
Detect relay services and forwarding domains that mask real addresses
{"mx": true}
Ok
MX records validation
Verify that a domain has a valid MX record.
{"public_domain": true}
Ask for work email
Public email detection
Detect public email providers like Gmail and Yahoo
{"did_you_mean": "hotmail.com"}
Suggest modification
Smart Email Suggestions
Fix common typos with our smart email autocorrect.
{"role_account": true}
Flag as role account
Role detection
Identify role email accounts (hello@, support@, etc).
hello@pantheon.mail
Invalid syntax
Syntax validation
Validate email addresses against industry standards to ensure proper formatting.
Send any email address to our API and instantly know if it's:
curl https://api.usercheck.com/email/email@example.com{
"status": 200,
"email": "email@example.com",
"domain": "example.com",
"mx": false,
"disposable": false,
"public_domain": false,
"relay_domain": false,
"alias": false,
"role_account": true,
"spam": false,
"did_you_mean": null
}Start on our forever free plan
Perfect for small projects or to try out our service.
$0 /month
Use for freeIdeal for growing startups and established businesses.
$50 /month
Start for freeTailored solutions for enterprise-level operations.
Custom
Contact salesQuick integration with your favorite tools
Block temporary emails with one API call.
1,000 free requests each month. No credit card required.