About this video
The address in this video is an example. API keys come with a paid account.
Video transcript
An email validation API checks a signup address in one call, before you save it. Your form posts the address to slash verify. One JSON object comes back. Branch on status. Log the reason code. Flags like disposable or role describe the address, not the verdict. Unknown isn't an error. The receiving server didn't commit, and it costs zero credits. So don't fail the signup. Save it as unverified, and check again from a queue later. Store the status, reason and check time on the record, so you can change policy later. API keys need a paid plan. Try an address free first at billionverify.com.
Featured in this video
Free Email Validation API — Real-Time SMTP ChecksEmail Validation API runs a live SMTP check on one endpoint, plus batches of up to 50 addresses, CSV jobs, webhooks and SDKs for Python, Node.js, Go and PHP.Try Free Email Validation APIMore in Free Tools
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BillionVerify pricing
Start free, then pay for what you verify. Pick a plan or buy credits once.
billed yearly $96
Save 60%$0.0004 / per credit
All 240,000 credits arrive at once. Use them anytime.
Choose your credits
Included in every paid plan
- 240,000 credits / year
- Single email verification
- Bulk email verification
- Email Finder
- Bulk Email Finder
- Company Search
- Live SMTP mailbox check
- Real-time API + batch processing
- CSV & Excel upload support
- Comprehensive verification reports
- Workspaces and teams with spend limits
- Credits never expire
Try the AI email verification features
20 free credits every day you log in, up to 600 a month. Free AI first email verification across every feature, no credit card.
Native MCP Server integration · Catch-all reported separately · Free tier, no credit card