Requestly is an open-source tool that simplifies API development, testing, mocking, and integration for developers and QAs.

Monitor network requests and API failures with real-time insights

Mockoon is the easiest and quickest way to design and run mock REST APIs.

AutoExplore delivers always-on, autonomous testing that navigates your app like a real user. Catch errors, security vulnerabilities and accessibility issues before deploying to production.

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.

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