Mailboxlayer — independent third-party profile of a public API surface, by API Evangelist. mailboxlayer is an apilayer-owned REST JSON API for email address verification. It performs syntax and typo checks, MX-record lookup, real-time SMTP verification, catch-all detection, role-address detection, free and disposable provider detection, and returns
email disposable-email email-validation smtp email-verification public-apis apilayer quality-score mx-records apis-json free-email-provider catch-all-detection apis-io apis-io-submission role-address
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Updated
Aug 30, 2026