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

The World's first AI Driven Enterprise Software Reliability Platform

Postman is an API platform for building and using APIs. Postman simplifies each step of the API lifecycle and streamlines collaboration so you can create better APIs—faster.

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.

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

Puppeteer is a Node.js library which provides a high-level API to control Chrome/Chromium over the DevTools Protocol.