Free & OpenSource REST API Testing Tool for all levels in a Test Pyramid

API Testing Platform that automatically generates unit test cases with dependency mocks from API calls

RapidAPI for Mac is a full-featured HTTP client that lets you test and describe the APIs you build or consume. It has a beautiful native macOS interface to compose requests, inspect server responses, generate client code and export API definitions.

Playwright enables reliable end-to-end testing for modern web apps.

Design, debug, and test APIs locally or in the cloud

Jest is a delightful JavaScript Testing Framework with a focus on simplicity.