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Security — entry 002 of 30

Botd

Verified Jul 2026

BotD is FingerprintJS's open-source, MIT-licensed JavaScript library that runs entirely in the browser to flag basic automation -- headless Chrome, PhantomJS, Selenium, and similar tools -- without any server round-trip for the detection itself. It ships as an npm package or as a CDN-hosted ES module and returns a plain detected/bot-kind result object from a single detect() call. It is free for any use with no signup; FingerprintJS separately sells a more sophisticated, paid, server-side Bot Detection API for teams that need those extra signals.

bot-detectionbrowser-fingerprintingjavascript-libraryopen-sourcefraud-prevention
Visit github.com ↗Read the docs ↗More Security
AuthenticationNone requiredCall it straight away — no key, no signup.
HTTPSSupportedTraffic is encrypted in transit.
CORSEnabledCallable directly from browser JavaScript.
PricingFreeNo paid tier — free for the documented use case.
FormatsJSONResponses can be requested as JSON.

GreatAPIs Score

Score88out of 100
Authentication25/25No authentication required
Pricing20/20Free to use
Docs14/20Documentation URL provided
Formats9/15Single response format
Freshness20/20Verified within 6 months

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Scored 88 on greatapis.com
<a href="https://greatapis.com/api/botd/"><img src="https://greatapis.com/badge/botd.svg" alt="Scored 88 on greatapis.com"></a>

Auth quickstart

  1. No key needed — call it now.
Stored keyNo key stored

Your key is stored only in this browser (localStorage) and sent directly to the API — never to greatapis.

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