Platform
Device intelligence platform: identify, decide, learn
FingerPrint Checker is a platform in three layers: it identifies the device, judges the request, and gives your backend a decision it can act on. Most tools stop at an ID and leave you to write the rules. Here the decision is the product, and you pay only for decisions.
Identify
A server-verified device ID for browsers and for Android, iOS and macOS apps, with cross-browser and household linking.
Judge
Automation, tampering, datacenter and Tor traffic, and platform proofs in apps feed a trust assessment. A human check by proof-of-work or Turnstile covers new devices.
Decide
Your backend asks one question and gets allow, a human check or deny.
- Eligibility: may this user claim a trial, coupon or sign-up bonus? One claim per device and per normalised email, per-network limits, disposable-email blocking, and release of a claim after a refund.
- Quota: may this anonymous visitor use this feature again? N uses per rolling window, no email needed.
- Referral relation: is this invitee probably the inviter on another account? Graded signals and an advisory suggestion.
Improve
Send feedback labels (abuse or legit) for visitors and claims. Labels never change a decision by themselves; they help us judge new detections before they affect decisions.
Operate
The console manages projects and keys, the human check, the network limit, native app settings, claim groups, usage and credits. A public status page shows live API health.
Pricing in one line
Prepaid credit packs, one credit per decision, 12-month validity, and free checks on sign-up.
Frequently asked questions
How is this different from an ID-only service?
An ID-only service returns a visitor ID and signals and you write the rules. We return the decision itself, plus the household, claim-group and quota logic around it.
Can I use only part of it?
Yes. You can use quotas without eligibility, or only the referral relation check. Each decision is billed on its own.
Try it on your own sign-up flow
Every new account gets 2,000 free checks. No card required.