vREST
An effective online tool for automated REST API Testing. It also provides mocking, automated recording and specification of REST / RESTful / HTTP APIs.
SoapUI
SoapUI is an open source cross-platform automated testing tool. It enables test engineers to create and run scripts for functional, regression, compliance, and load testing.
Postman – REST Client
PostMan in GChrome is an effective modern instrument for testing APIs. It allows to construct and manage complex HTTP requests.
