BillionVerify

BillionVerify checks whether email addresses can actually receive mail, so you can clean a list before you send to it. Ask Claude to verify one address or a batch of up to 50. Each result tells you whether the address is valid, invalid, catch-all, disposable, a role account or unknown, together with the domain's mail server status and an optional mailbox-level SMTP check. You can also review past verifications, see totals for the last 7, 30 or 90 days or the last year, track asynchronous verification jobs and get download links for their results, check your remaining credit balance, and manage webhooks that notify your systems when a job finishes. You sign in with your BillionVerify account over OAuth. BillionVerify only accesses the addresses you ask it to check and the verification data in your own account. Verifying an address uses credits from your BillionVerify account. BillionVerify verifies addresses you provide. It does not find, guess or generate email addresses, and it does not send email.