Web API

Screenshot of web API documentation written by NASA

A web API is an application programming interface (API) for either a web server or a web browser. It can refer to a client-side JavaScript API (including any web frameworks being used) or a server-side web API. The latter consists of one or more endpoints to a defined request–response message system, typically expressed in JSON or XML by means of an HTTP-based web server.

A server API (SAPI) is not considered a server-side web API, unless it is publicly accessible by a remote web application.

{ "date":"1996-12-03", "explanation":"Like a butterfly,\r a white dwarf star begins its life\r by casting off a cocoon that enclosed its former self. In this\r analogy, however, the Sun would be\r a caterpillar\r and the ejected shell of gas would become the prettiest of all!\r The above cocoon, the planetary nebula\r designated NGC 2440, contains one of the hottest white dwarf stars known.\r The white dwarf can be seen as the bright dot near the photo's\r center. Our Sun will eventually become a \"white dwarf butterfly\",\r but not for another 5 billion years. The above false color image recently entered the public domain\r and was post-processed by F. Hamilton.\r", "hdurl":"https://apod.nasa.gov/apod/image/9612/ngc2440_hst2_big.jpg", "media_type":"image", "service_version":"v1", "title":"Cocoon of a New White Dwarf\r\nCredit:", "url":"https://apod.nasa.gov/apod/image/9612/ngc2440_hst2.jpg" }