How to install WP REST API
The WordPress REST API provides an easy-to-use set of HTTP endpoints that let you access your site’s data in simple JSON format, including users, posts, taxonomies and more. Retrieving or updating data is as simple as sending an HTTP request.
The WordPress REST API is a universal connector from any WordPress installation to any given application on a web server or user operating system.
Please download the WordPress REST API (Version 2)
How to install plugin, follows next instructions:
Active the WordPress REST API (Version 2) plugin from your WordPress settings dashboard.