Postman

Postman

Postman is an application for testing APIs, by sending requests to the webserver and getting the responses. This tool allows you to design, mock, debug, automated testing, document, monitor, and publish the APIs - everything from one place. It is a scalable API testing tool that is free to download and can be used for teams of any size and a collaboration platform for API development. 

Rest API Testing

Rest API 
REST API testing is an open-source automation technique to test RESTful APIs for web apps. It is commonly used for testing JSON and XML-based web apps. It is compatible with all methods: GET, PUT, POST, PATCH and DELETE. REST is a Java library. This guide to REST API testing will help you understand the basics. 

API Automation

API Automation

By the end of this course, you will have learned how to approach Web API test automation, decide what solutions are appropriate to your specific needs, and the practical coding skills to achieve faster testing. All of this will serve you as a foundation to further develop a fully automated approach to testing within the SDLC.

A beginners guide to understanding API

A beginners guide to understanding API

An application programming interface (API) is a set of tools, definitions, and protocols for integrating application software and services. It's the stuff that lets your products and services communicate with other products and services without having to constantly build new connectivity infrastructure.