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.

Martin Pettersson

An extension for the WP REST API that exposes endpoints for sidebars and widgets.
note: this plugin is under heavy development and will receive frequent feature updates (including documentation) so stay tuned and checkout the <a href="https://github.com/martin-pettersson/wp-rest-api-sidebars" rel="nofollow ugc">github</a> repo for the latest updates
<h4>Currently supported endpoints</h4>

/wp-json/wp-rest-api-sidebars/v1/sidebars returns a list of registered sidebars
<pre><code>[
 {
 "name": "Sidebar Name",
 "id": "sidebar-id",
 "description": "Sidebar description...",
 "class": "sidebar-class",
 "before_widget": "<aside id=\"%1$s\" class=\"widget %2$s\">",
 "after_widget": "<\/aside>",
 "before_title": "<h1 class=\"widget-title\">",
 "after_title": "<\/h1>"
 }
]
</code></pre>
/wp-json/wp-rest-api-sidebars/v1/sidebars/{id} returns the given sidebar
<pre><code>{
 "name": "Sidebar Name",
 "id": "sidebar-id",
 "description": "Sidebar description...",
 "class": "sidebar-class",
 "before_widget": "<aside id=\"%1$s\" class=\"widget %2$s\">",
 "after_widget": "<\/aside>",
 "before_title": "<h1 class=\"widget-title\">",
 "after_title": "<\/h1>",
 "rendered": "<aside id=\"widget-id-1\" class=\"widget widget_widget-id\">...",
 "widgets": [
 {
 "name": "Widget Name",
 "id": "widget-name-1",
 "classname": "widget_widget_name",
 "description": "Widget description",
 "rendered": "<aside id=\"widget-names-1\" class=\"widget widget_widget_name\">..."
 }
 ]
}
</code></pre>

WP REST API Sidebars

Works great!

An extension for the WP REST API that exposes endpoints for sidebars and widgets.

RESTless vs WP REST API Sidebars