Disify vs Kickbox

A free, keyless REST API that checks an email's syntax, DNS/MX records, whether its domain is disposable or on an allow-list, and whether its mailbox is a role address, returning a single JSON verdict. No signup is required for the core lookup, with paid business accounts available for higher volume.

Kickbox's free, keyless Open API endpoint answers a single question — whether an email domain is disposable — a common building block for lightweight signup-form validation. It's a separate, fully free offering from Kickbox's metered full verification product, which is where catch-all (accept-all) detection lives; a live probe found no catch-all surface on the open endpoint at all.