Security — entry 010 of 30
FingerprintJS Pro
Fingerprint Pro (the FingerprintJS company rebranded as Fingerprint) derives a stable visitor ID from hundreds of browser and device signals, distinguishing real returning users from bots, spoofed devices, and account-takeover attempts. A JavaScript agent collects the signal client-side, and a server-side Identification API (api.fpjs.io) verifies and enriches the result with confidence scores plus VPN, incognito, and bot flags. The free plan includes 1,000 monthly API calls (500k on Android) with a 14-day unlimited trial of the paid Pro Plus tier, which is metered per additional 1,000 calls beyond its included quota.
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<a href="https://greatapis.com/api/fingerprintjs-pro/"><img src="https://greatapis.com/badge/fingerprintjs-pro.svg" alt="Scored 61 on greatapis.com"></a>Auth quickstart
- Sign up with the provider to get an API key.
- Send it on every request as a header
Authorization: <key> - The exact header isn't documented — Authorization is a common default; confirm in the provider's docs.
Your key is stored only in this browser (localStorage) and sent directly to the API — never to greatapis.