What is an API?
API is a set of instruction and protocols for building and integrating application software. Naturally API stands for Application Programming Interface.
API used to communicate your product or services with other clients product and services, for this process we don’t know how they are implement.
Basically, API’s simplify how developers integrate new application component into an existing architecture.
Example Live API’s
A site that tracks more than 15,500 APIs, lists Google Maps, Twitter, YouTube, Flickr and Amazon Product Advertising as some of the the most popular APIs. The following list contains several examples of popular APIs:
YouTube APIs: YouTube API: Google’s APIs lets developers integrate YouTube videos and functionality into websites or applications. YouTube APIs include the YouTube Analytics API, YouTube Data API, YouTube Live Streaming API, YouTube Player APIs and others.
Flickr API: The Flickr API is used by developers to access the Flick photo sharing community data. The Flickr API consists of a set of callable methods, and some API endpoints.
Twitter APIs: Twitter offers two APIs. The REST API allows developers to access core Twitter data and the Search API provides methods for developers to interact with Twitter Search and trends data.
Amazon Product Advertising API: Amazon’s Product Advertising API gives developers access to Amazon’s product selection and discovery functionality to advertise Amazon products to monetize a website.
Credits : MuleSoft Videos