If you are working with APIs, you need Postman. It really simplifies debugging your own API servers and the APIs that you are using.
“Postman is the only complete API development environment, for API developers, used by more than 6 million developers and 100,000 companies worldwide. Postman makes working with APIs faster and easier by supporting developers at every stage of their workflow, and is available for Mac OS X, Windows, and Linux users.”
Source: Postman | API Network