API Tester - REST API Tester Client FREE is a Chrome extension developed by 99extensions. It is a powerful tool designed for developers to develop, test, and debug REST APIs.

The main functionality of the API Tester includes the ability to send requests and display responses for various HTTP methods such as GET, PUT, PATCH, DELETE, HEAD, OPTIONS, and Custom requests. Users can also add custom headers and basic authentication to their requests. This makes it easy to test and verify the functionality of APIs.

Additionally, the API Tester allows users to manage their favorite requests, making it convenient for debugging purposes. Users can store and organize their favorite requests and even import and export them for easy sharing.

Furthermore, the API Tester keeps a record of request history by default. This feature ensures that all requests made are stored for future reference and analysis. It is important to note that the API Tester does not store any requests made from an incognito window, ensuring user privacy.

For assistance and guidance, the API Tester extension provides a dedicated Help section. This section provides detailed information on the essential functionality of the extension, helping users make the most of their API testing experience.