{"repo":"ashtonav/opencaptcha","free":true,"listed":false,"github":"https://github.com/ashtonav/opencaptcha","clone":"git clone https://github.com/ashtonav/opencaptcha.git","description":"Open source, free, public API that generates CAPTCHA images from text. Try it out at api.opencaptcha.io.","language":"C#","stars":18,"topics":["captcha","captcha-generator","captcha-image","captcha-makers","opencaptcha","free","api","anti-bot","docker","multilingual"],"license":"MIT","category":"deployment-docker-iac","readme_excerpt":"OpenCaptcha OpenCaptcha is an open source, free, public API that generates CAPTCHA images from text. OpenCaptcha provides: - A free, public API at api.opencaptcha.io. - Documentation at opencaptcha.io. - Self-hosting support (see the Installation section). Usage Example 1: Generated CAPTCHA images are randomly distorted. Example 2: Generated CAPTCHA images can contain text in many languages. Example 3: Generated CAPTCHA images can be in different colors. Installation Option 1: Using Docker (recommended for self-hosting) Requirements - Docker. How to Run 1. From the root folder of the project, run the following commands: 2. The API can be accessed at http://localhost:5280. Option 2: Using Visual Studio (recommended for development purposes) Requirements - Visual Studio 2026. - With ASP.NET and web development installed from the Visual Studio Installer. - .NET 10 SDK. How to Run 1. Open the solution in Visual Studio 2026. 2. Build and launch the Captcha.WebApi project. 3. The API can be accessed at https://localhost:5280. How to Test 1. Open the solution in Visual Studio 2026. 2. Run the tests in Test Explorer. Acknowledgments A significant portion of this project, especially the CAPTCHA generation code, is inspired by work originally published on February 9, 2004, by BrainJar. Contributing Pull requests are accepted. License MIT.","default_branch":null,"files":null,"tree":[],"storefront":"/r/ashtonav","claimed":false,"request_supported":{"post":"https://gitbuyer.com/r/ashtonav/opencaptcha/request-supported","requests":0},"note":"indexed from public GitHub; nothing is for sale on this page. Clone it from GitHub. Paid listings live at /search."}