Cap: Lightweight, modern open-source CAPTCHA alternative using proof-of-work

What is Cap? ​ Cap is a lightweight, modern open-source CAPTCHA alternative using SHA-256 proof-of-work. It's fast, private, and extremely simple to integrate. Learn more about proof-of-work here. Cap is built into 2 main parts: @cap.js/widget : A small JavaScript library that renders the CAPTCHA and handles solving it using Web Workers and WASM. @cap.js/server: An extremely simple, zero-dependencies library that handles creating and validating challenges. There are also some other helpful packages: @cap.js/solver : Server-side solver for the CAPTCHA in case you want to use machine-to-machine. @cap.js/cli : Command-line interface for solving CAPTCHAs made with Cap. It's mainly designed for testing and when you need to solve these CAPTCHAs in a browser without JavaScript support. Standalone mode : Docker image that helps you use Cap with any language or framework. It runs a simple REST API that can be used to create and validate challenges and an interactive UI to manage your ke ... Read full article.