In the previously introduced new web application model powering dynamic/interactive websites, the data integrated in the webpage on the client side is usually exchanged between server and client in standardized formats such as XML and JSON. The concept of web APIs is based on the same idea and specifically aimed at facilitating the integration of web data in various applications/websites over the Internet. Web APIs thus serve as data hubs providing data to various web applications which might further process the data and finally display it in a graphical user interface (e.g., a webpage). Large parts of the explicit exchange of data over the Internet through such applications are thus happening “programmatically” and not “manually” by users explicitly requesting data by typing a URL into the browser bar.