Postman

Postman is a popular tool for testing and developing APIs (Application Programming Interfaces). It allows developers to easily send HTTP requests (such as GET, POST, PUT, and DELETE) to a server and view the response. Postman also provides features for organizing and saving requests, as well as generating code snippets in various programming languages for use in development. It is widely used by developers and testers to test the functionality of the API, debug, and check the performance of the API.

Postman offers range from a free plan for small teams to enterprise plans that can serve thousands of developers and offer custom domains, reporting, analytics, governance, and enterprise integrations with GitHub and GitLab.