The Verifier at app.argorant.com/verify checks addresses you already have. It is useful for a list you inherited, a CRM segment nobody has touched in a year, or a file from another source that you do not want to mail blind.
- Open Verify in the app.
- Check a single address directly, or upload a CSV for a batch.
- Wait for the run to finish. Larger batches process in the background, so you can leave the page.
- Review the results, including any addresses labelled as catch-all, and decide how to treat them.
The same logic applies as in exports: catch-all domains are labelled honestly rather than passed off as valid, because no method can confirm an individual mailbox on a domain that accepts everything.
The Verifier is also available outside the app. The CLI has argorant verify for a single address and a bulk mode that reads a CSV, and the REST API exposes /api/mcp/email/verify, which is what you would wire into a form, an onboarding flow or a scheduled CRM hygiene job.
A sensible cadence for an existing database is to re-verify before each major send rather than continuously, since results stay valid for 60 days.