Free Email APIs

Disify is a free, no-auth API that checks whether an email address or domain belongs to a known disposable or temporary email service.

DropMail provides a GraphQL API for creating and managing temporary email inboxes, letting you generate disposable addresses and receive real emails without registration.

Guerrilla Mail provides a REST API for creating and reading disposable temporary email addresses, useful for testing email flows without exposing real inboxes.

Kickbox provides a free, no-auth email verification endpoint that checks whether an email address is deliverable by performing syntax validation, domain MX lookup, and disposable address detection.

mail.gw is a REST API for creating and managing temporary 10-minute email addresses with full inbox access, all without authentication for basic use.

mail.tm is a temporary email service API that creates persistent (but disposable) email accounts accessible via a REST interface using JWT authentication.

MailCheck.ai (powered by UserCheck) is a free API that detects whether an email domain belongs to a known temporary or disposable email provider, helping prevent fake sign-ups without requiring authentication.