What is API :
An application-programming interface (API) is a set of programming instructions and standards for accessing a Web-based software application or Web tool.
Example :
An API is a software-to-software interface, not a user interface. With APIs, applications talk to each other without any user knowledge or intervention. When...Continue reading the article:
http://blog.testproject.io/2016/04/17/api-testing-using-selenium-webdriver-java/