REST API Testing is open-source web automation testing technique that is used for testing RESTful APIs for web applications. The purpose of rest API testing is to record the response of rest API by sending various HTTP/S requests to check if rest API is working fine or not. Rest API testing is done by GET, POST, PUT and DELETE methods.
SOAP UI is the leading open source cross-platform API Testing tool. SOAP UI allows testers to execute automated functional, regression, compliance, and load tests on different Web API. SOAP UI supports all the standard protocols and technologies to test all kinds of API’s. SOAP UI interface is simple that enables both technical and non-technical users to use seamlessly.