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00:00 Intro
00:40 Overview
03:27 Weather app example
05:26 YouTube API example
10:58 Conclusion

What is an API?

API stands for Application Programming Interface and it's essentially a doorway into an application.

Using this doorway, other thirdparty applications can get access to all of the data and features without needing to provide any custom code or integrations whatsoever.

The process works something like this.

An API request is sent to the application. An API request is just a simple HTTP message with some parameters telling the app what information to send back. This response will be sent back usually in JSON or XML format.

The beauty of APIs is that anyone can access information and features that would otherwise be unobtainable.

For example, most of us do not have access to a worldwide network of weather stations, but, anyone can build a mobile app and use APIs to request the data from the already existing weather application.

APIs have become so widespread, you would be hardpressed to find a popular application these days that doesn’t offer API access.

With this amount of access to APIs, the possibilities are endless.