Fake data tool

Voiden is a developer-first API client with local storage, Git-integrated, all based on markdown + offline support.

A modern, resource-friendly REST client for Windows 10

Great Expectations is the leading tool for validating, documenting, and profiling your data to maintain quality and improve communication between teams

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.

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