# webdecoy/fcaptcha

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158 stars · 10 forks · JavaScript · MIT

## Links

- GitHub: https://github.com/WebDecoy/FCaptcha
- Homepage: https://webdecoy.com/product/fcaptcha/
- awesome-repositories: https://awesome-repositories.com/repository/webdecoy-fcaptcha.md

## Description

Open-source, invisible CAPTCHA that detects AI agents, bots, and headless browsers via 40+ behavioral signals, device & TLS fingerprinting, and SHA-256 proof of work. Self-hosted and privacy-first.

## Tags

### Part of an Awesome List

- [Security Hardening](https://awesome-repositories.com/f/awesome-lists/security/security-hardening.md) — Self-hosted CAPTCHA with behavioral analysis.
- [Web Honeypots](https://awesome-repositories.com/f/awesome-lists/security/web-honeypots.md) — Self-hosted CAPTCHA that functions as an inline bot honeypot.