Oleg Kostin

This plugin extends the <a href="https://wordpress.org/plugins/rest-api/" rel="ugc">WordPress JSON REST API</a> with new routes for WordPress options

WP API Options

Extends WordPress WP REST API with new routes pointing to WordPress options.

jcdev518

This plugin adds “routes” or “endpoints” to WP REST API that allows for retrieval of 
menu data as JSON.
Updated port of “WP-REST-API V2 Menus” by Claudio La Barbera (http://www.claudiolabarbera.com)
Usage
Get all registered menus:
<pre><code>GET /wp-menus/v1/menus
https://yourwpsite.com/wp-json/wp-menus/v1/menus
</code></pre>
Get menu data as JSON from menu slug:
<pre><code>GET /wp-menus/v1/menus/{slug}
https://yourwpsite.com/wp-json/wp-menus/v1/menus/{slug}
</code></pre>
Gets the contents of a registered menu by its “slug”.
When assigning a menu a location in /wp-admin/nav-menus.php?action=locations 
the slug is the name of the menu in lowercase and without any spaces like a post slug.
If your menu name is Main Menu: 
https://yourwpsite.com/wp-json/menus/v1/wp-menus/main-menu

WP API Options vs WP-REST-API Menus