v1.0.0

First release.

• Detects 69 named captcha and bot-check products (reCAPTCHA, hCaptcha, Turnstile, Arkose, GeeTest, AWS WAF, DataDome, PerimeterX/HUMAN, Akamai, Imperva, Kasada, Cloudflare challenge pages and more) plus catch-all rules for unknown ones.
• detect() in a page or extension, detectInPage() for Playwright/Puppeteer (cross-origin frames included), detectHtml() for raw HTML, detectResponse() for scraper API and HTTP client results, and a CLI.
• Zero dependencies.

npm install captcha-detector

captcha-detector.js below is the browser build (exposes window.CaptchaDetector), for <script> tags, userscripts and Selenium's execute_script.