A: Hi Lou! Great question — and you're absolutely right to want clarity here.

Checker is not a typical email verification tool (like those that check MX records or SMTP responses). Instead, it focuses specifically on identifying temporary, disposable, or suspicious email domains — the kind often used for fake signups.

So yes — it does detect "BS" email addresses like trashmail.com, temp-mail.org, or new suspicious domains discovered daily. This happens in real time with sub-200ms responses.

You don’t need a second API — Checker provides this capability directly via a single API endpoint. However, if you're already using a standard email verification tool, Checker is a perfect complement to catch what those tools usually miss (temporary or shady domains that pass syntax and MX checks but are still low-quality or risky).