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JCap - Invisible Captcha

JCap – Invisible WordPress Captcha

by CaeserBy · github.com/jukuan/jcap-wp-captcha · website

★ 0stars

Install

Download source zip No release zip yet

This is the repository archive. It installs, but the folder name will carry the branch suffix and updates will not flow.

Install straight from GitHub with WP-CLI:

wp plugin install https://github.com/jukuan/jcap-wp-captcha/archive/refs/heads/main.zip
No built-in updater. New versions won't appear under Dashboard → Updates. Install new releases yourself, or let Git Updater track the repository.
Readme github.com/jukuan/jcap-wp-captcha ↗

JCap - Invisible Captcha for WordPress

Invisible bot detection for WordPress using behavioral analysis, performance testing, and intelligent delays. No user interaction required.

How It Works

JCap uses a multi-factor detection system:

  • Behavioral Analysis — Tracks mouse movements and keyboard interactions
  • Performance Testing — Runs Sieve of Eratosthenes + Mandelbrot Set in a Web Worker
  • Browser Fingerprinting — Detects WebGL, plugins, WebDriver flags
  • Server-Side Validation — HTTP header analysis, CSRF, honeypot, rate limiting

Scores are weighted. Suspected bots receive graduated delays (0.5–8 seconds).

Protected Forms

  • WordPress Login / Register / Lost Password
  • WooCommerce Login / Register / Checkout
  • Custom forms via [jcap_form] shortcode

Quick Start


# Clone the repo
git clone https://github.com/jukuan/jcap-wp-captcha.git

# Install in WordPress
cp -r jcap-wp-captcha /wp-content/plugins/jcap

# Activate and go to Settings > JCap Captcha