Guerrilla Mail vs Kiprio Email Validate

Guerrilla Mail issues disposable, auto-expiring inboxes and lets a client poll or fetch their incoming messages through a simple JSON-over-AJAX endpoint, no signup or key required. It's a fully free anti-spam utility with no paid tier.

One of Kiprio's focused developer APIs, this endpoint runs syntax, MX-record, disposable-domain, and role-account checks on an email address and returns a confidence score in one JSON response. A keyless demo tier is rate-limited to 20 requests a day; a free API key raises that ceiling before paid plans apply.