Open-source, frictionless CAPTCHA and bot defense. A privacy-focused alternative to reCAPTCHA and hCaptcha.

Anti-DDoS-Lite (Anti-Crawler app) is a small PHP app to protect your site against DDoS attack.

Unveil hidden messages within images using Minesweeper-inspired decoding. Left-click to reveal clues, right-click to flag suspected mines. Decode correctly to reveal parts of the image. No blind flagging! Also serves as human verification.

A Model Context Protocol (MCP) server implementation that exposes Pearl's AI and Expert services through a standardized interface

Human interaction verification through behavioral biometrics. Analyzes mouse movement, click patterns, keystroke dynamics, scroll behavior, touch pressure, and device sensors to distinguish humans from bots.

Easy to use tool to estimate users age

CAPTCHA Shield v4.0 - Advanced Anti-Bot/AI CAPTCHA with 14 behavioral signals, 7 challenge types, QR mobile verification. 100% client-side.

A lightweight, client-side CAPTCHA library designed to protect web forms from automated bot submissions without relying on any external APIs or dependencies. Built entirely in vanilla JavaScript and rendered via HTML5 Canvas, it provides secure, user-friendly visual verification challenges that seamlessly integrate into any HTML form.

Humangram is a social proof of humanity plugin for HUMAN protocol on Telegram.

Cryptographic Proof of Effort (CPoE) — IETF Internet-Draft specification for verifiable attestation of human cognitive involvement in digital content creation, built on the RATS architecture (RFC 9334)

A tool for human verification.

Detect bots, verify humans.

A decentralised, AI-proof, federated trust standard for humans, not robots. Cypherpunks Assemble!

The CAPTCHA you draw — privacy-first, AI-proof, drop-in reCAPTCHA alternative

PHP Captcha library

Mirror for https://forgejo.remote.kovacsbalinthunor.com/kbalinthunor/no-slop-license . A permissive software license that prevents mindless AI-generated commercial exploitation

A privacy-first verification system for Krita that captures your creative process and generates encrypted proof of human authorship

Moved to AI2Human Network: https://github.com/ai2humannetwork

A modern React CAPTCHA component library with advanced human verification