Billion Email Checker (@billionvfy) profile picture

https://nitter.cf/t.co/829Kgxynex | Professional Email Verification. Verify emails in real-time with 99.9% accuracy.

Delaware
Joined February 2026
Photo by Billion Email Checker (@billionvfy)
BillionVerify is now in Claude's official connector directory. Search "BillionVerify" in Claude, click Connect, sign in. Then just ask Claude to check your emails. No server URL to paste. No API key. claude.ai/directory/billionv…
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Which German mail login is yours? IONOS mailboxes open at mail.ionos.de. 1&1 mail starts at 1und1.de/login. They are two different accounts. Our guide covers resets and mail program settings too. billionverify.com/blog/ionos…
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Arcor, kabelmail and Vodafone mail all sign in at one form: mail.vodafone.de. Watch the two passwords. The mailbox needs the IMAP one. billionverify.com/blog/vodaf… billionverify.substack.com
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Cost in Claude is the same as anywhere else in BillionVerify: 1 credit for a definite result. Unknown, disposable and badly formatted addresses are free. So is checking the same address again within 24 hours.
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Bigger list? Upload the file in the dashboard, then ask Claude to track the job and fetch the results.
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What we shipped in BillionVerify in October, in one thread. Auto top-up, background downloads, workspaces and teams, Claude and Vercel connectors, the yearly math, and a question. Pricing: billionverify.com/pricing Product updates on Substack: billionverify.substack.com
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The yearly math: at 100,000 verifications a month, we cost $384 a year. Pay-as-you-go, the same volume is $4,800 a year at NeverBounce and $7,788 at ZeroBounce, going by their pricing pages on October 21.
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One question: are you using BillionVerify to make money or to save money? Reselling it, cleaning lists for clients, cutting your email platform bill, something else? Reply and tell us how. We only share a story with your permission.
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Workspaces and teams: give each client or brand its own workspace with its own balance, plan, invoices and API keys. Invite people as owner, admin or member, and give each team a spending limit.
BillionVerify is now in Vercel Connect. Store your API key once. Any Vercel app or agent you link can verify emails at runtime. No key in env vars. How it works: billionverify.com/blog/billi… On Substack: billionverify.substack.com/p… Also in Claude: billionverify.com/blog/billi…
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Shared API Keys: one key, your account, your credits. For your own signup forms, lead jobs and agents. Per-User API Keys: each of your users brings their own BillionVerify key. For products you build for other people.
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Same credits as everywhere else in BillionVerify. Unknown, disposable and badly formatted addresses cost nothing. Catch-all stays catch-all. We don't file it under valid.
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