ChazUK

Returns Yoast post or page metadata in a normal post or page request. Stores the metadata in the yoast_meta field of the returned data.

WP API Yoast SEO

Returns Yoast post or page metadata in a normal post or page request.

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 Yoast SEO vs WP-REST-API Menus