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

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

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

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

Unifying API testing, API Performance testing, API Mocks and UI testing.

Website and mobile testing at every stage of development