Free API to block disposable emails

In plain words

UserCheck is an API that identifies and blocks disposable and fake email addresses. It validates email formatting against industry standards and checks domain authority, MX records, SPF, and DMARC settings to distinguish legitimate users from fraudulent ones. The service is designed for developers who need to prevent fake signups and maintain data quality. A free tier is available to get started.

written from the facts on this page · September 2026

From the sources

UserCheck identifies and blocks fake email addresses. So you can focus on real users. Validate email addresses against industry standards to ensure proper formatting. Integrate directly with our RESTful API. Works with any language or framework. Block disposable emails from your WordPress forms and registrations. Native Laravel validation rule for email and domain verification. Connect UserCheck to thousands of apps with no-code automation. We're always adding new integrations. Tell us what youfrom validator.pizza

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