Checkfor — Verify email & phone via one fast APISign inStart free
One API · Email + Phone · Pay per lookupVerify email & phone through one fast API<br>Checkfor normalizes email and phone verification behind a single endpoint — with scoring, caching and a unified credit system. Clean data in, confident decisions out.<br>Start free — 100 creditsRead the docs<br>POST /v1/verify<br>curl -X POST https://checkfor.dev/v1/verify \<br>-H "Authorization: Bearer cf_live_xxx" \<br>-d '{ "type": "email", "value": "ada@lovelace.io" }'
"type": "email",<br>"valid": true,<br>"score": 92,<br>"cost": 1,<br>"creditsRemaining": 4991
Everything you need to trust your data<br>Accurate email and phone verification through one fast API, with a single normalized response and a confidence score you can act on.
Email verification<br>Syntax, MX records, disposable and role-address detection, plus optional SMTP mailbox and catch-all probing.
Phone verification<br>E.164 parsing, line type, carrier and live reachability through real HLR lookups. Swap providers without touching your code.
Unified credits<br>One balance for every lookup type, debited atomically. Hit your credit ceiling and the API answers 402 — never a surprise bill.
Fast & reliable<br>Sub-300ms responses backed by a resilient infrastructure, so verification never slows down your signup or checkout flow.
Normalized results<br>Every response is a single, predictable envelope with a 0–100 confidence score. Same shape for email and phone.
Built for developers<br>REST + OpenAPI, a typed SDK, an in-dashboard playground, and instant API keys. Ship your first verification in minutes.
Plans up to 40% cheaper<br>Monthly credits that refresh every cycle — 40% below the closest competitor at equal volume. Go annual and get 2 months free. Start free with 1 verification a day, no card required.
Free<br>1 free check/day from the dashboard, plus 100 trial credits to test the API.<br>Free<br>1 verification/day
Start free
Starter<br>For solo builders and small lists. 1,000 credits every month.<br>€9/mo<br>1,000 credits/mo<br>€9.00/1k<br>Get Starter
Growth<br>20,000 credits/month — 40% cheaper than the closest competitor.<br>€59/mo<br>20,000 credits/mo<br>€2.95/1k<br>Get Growth
Most popularScale<br>Our most popular plan. 85,000 credits/month with priority support.<br>€159/mo<br>85,000 credits/mo<br>€1.87/1k<br>Get Scale
Pro<br>250,000 credits/month for high-volume verification.<br>€399/mo<br>250,000 credits/mo<br>€1.60/1k<br>Get Pro
Enterprise<br>1M+ credits, volume discounts, SLA and a dedicated contact.<br>Custom<br>1,000,000 credits/mo
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Ship your first verification today<br>Create an account, grab an API key, and call the endpoint in minutes. 100 credits on us — no card required.<br>Create your free account