A list of sites using the WP REST API in production (aka add your own)
- Comparing WordPress REST API Performance with admin-ajax.php
- Free ebook: Ultimate Guide to the WordPress REST API
- Creating a WordPress Theme using the REST API and Vue.js
- WP REST API 3 Parts
- Convince clients WordPress REST API Whitepaper
- The official documentation
- Check out the stuff that will end up in core
- WordCamp Talks about the REST API
- $$$ Javascript for WordPress Course