The interest in API tests has been growing progressively over the last few decades, as per Google Trends. 
Why API testing is required?
•  Scrutinizing an application at the API level would be catastrophic thus it is better to do it at first
•  Main functionalities of the Application Programming Interface can be validated
•  Consumes less time than that of Graphical User Interface functional tests
•  Testing data is mostly derived as XML or JSON. Thus the procedure, not language dependant
•  Can be easily integrated with Graphical User Interface tests

#testing #tools #api testing