UserScreen is an email-domain screening service designed to help businesses identify disposable, educational, and privacy-focused email domains before they enter signup funnels. Its API checks domains in real time, helping teams reduce fake signups and protect the quality of their user data. Rather than returning only a simple pass-or-fail result, UserScreen provides signals including whether a domain is disposable, a public email provider, or educational; its privacy classification; whether it has mail exchange records; and an overall risk score and level.

The service is accessed through a single GET request, with API documentation and pricing information available alongside sign-in. UserScreen also reports that it classifies hundreds of new domains each week, supporting detection as disposable-email sources change. Example checks show Gmail identified as a low-risk public provider and Mailinator as a critical-risk disposable domain.

By offering detailed domain assessments before registration, UserScreen gives organizations a practical tool for screening email addresses and making more informed decisions about incoming signups