API is the short form of ‘Application Performance Interface’. APIs are used to integrate data or tools between third-party software and your website.
In WordPress, the API allows developers to interact with the WordPress core software to access and manipulate data in various ways.
There are different types of APIs in WordPress, including the REST API, which allows for communication between WordPress and other applications or websites. The WordPress REST API enables developers to access WordPress content and features, including posts, pages, categories, tags, and comments, using standardized HTTP requests.
Other APIs in WordPress include the XML-RPC API, which allows remote access to WordPress through XML-RPC protocol, and the WP-API, which is an alternative REST API for WordPress that is built as a plugin.