Quick API Client is a free Chrome add-on designed for developers needing to test REST APIs efficiently. This tool allows users to compose and send REST calls directly from the browser's toolbar, streamlining the process of API testing. Users can configure various parameters such as method, URL, headers, query parameters, and body, making it versatile for different API requests.

The extension provides immediate feedback by displaying status codes, headers, and prettified JSON responses. Users can also copy a ready-to-run cURL command for easy integration into other tools. With the ability to save defaults, toggle between light and dark modes, and access handy presets along with recent history, Quick API Client enhances productivity by reducing the need to switch between applications during API testing.