BjornW

RESTless is a tiny WordPress plugin which disables access to the REST API (available in WordPress since version 4.4) for non-authenticated users. 
This prevents usage of the REST API by the general public and limits access to those with login credentials. No REST for the wicked.
It also supports WordPress Multisite installations.
<h3>Notes</h3>
Credits:
Sword icon used in the WordPress plugin repository and found as /assets/icon* 
From the series <a href="http://www.toicon.com/series/sketchy" rel="nofollow ugc">‘Sketchy’</a> By <a href="http://www.toicon.com/authors/1" rel="nofollow ugc">Shannon E Thomas</a>
Thanks Shannon E Thomas and to[icon] for sharing your work!
WordPress repository banner image found in /assets/banner*:
Orginal painting: <a href="http://hdl.handle.net/10934/RM0001.COLLECT.319230" rel="nofollow ugc">‘Draak’</a> 
Drawn by: <a href="https://en.wikipedia.org/wiki/Utagawa_Kuniyoshi" rel="nofollow ugc">Utagawa Kuniyoshi</a> 
Dated around 1808 – 1861 
Repository: Rijksmuseum.nl 
Modified by: <a href="https://burobjorn.nl" rel="nofollow ugc">Björn Wijers</a>
Thanks Rijksmuseum!

RESTless

RESTless disables REST calls for non-authenticated requests.

JS Morisset

Extends the WordPress REST API post, term, and user query results:
<ul>
<li>The <code>html</code> array includes HTML formatted meta tags and Schema JSON-LD (aka LD+JSON) scripts, as they appear in the webpage head section.</li>
<li>The <code>json</code> array provides Schema JSON-LD (aka LD+JSON) scripts in their decoded format.</li>
<li>The <code>parts</code> array offers meta tag attributes (aka “the parts”) as arrays, making it easier to find and use specific meta tag values.</li>
</ul>
There is no add-on settings page for this plugin – simply install and activate the plugin.

<h3>WPSSO Core Required</h3>
WPSSO REST API is an add-on for the <a href="https://wordpress.org/plugins/wpsso/" rel="ugc">WPSSO Core plugin</a>, which creates extensive and complete structured data to present your content at its best for social sites and search results – no matter how URLs are shared, reshared, messaged, posted, embedded, or crawled.

WPSSO REST API

Extends the WordPress REST API post, term, and user query results with an array of meta tags and Schema JSON-LD markup.

RESTless vs WPSSO REST API