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.

EVA provides programmatic access to validate email addresses via REST API.

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.