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.

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.

Bruno is a Fast and Git-Friendly Opensource API client, aimed at revolutionizing the status quo represented by Postman, Insomnia and similar tools out there.

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

Hand-crafted lightweight Rest Client for testing APIs. Supports collections, environments, git collaboration and local storage.