chertz

Quickly add Pages, Posts, or any custom post type posts to any of your menus while you are editing the post. Check the checkbox for the menu to add a menu item to, save, and then go to the admin menu page to see the new menu item.
On the edit page, down along the side is a ‘Add to menu’ box that has a list of the menus you have setup with checkboxes. If the post has already been added, then the checkbox is checked and disabled. If it has not been added to the menu, you can check the checkbox and save the post to add it. Afterwards, go to the Menu admin page to move (if wish) and publish the new menu item.
You can control which post types get the box by going to the ‘Settings > Add to menu’ page.
If the post type has hierarchal structure (such as parent Pages), this will try to place the new menu item underneath a menu item that links to an ancestor post (if menu item exists).

Add to Menu

Quickly add Pages, Posts, or any custom post type posts to any of your menus while editing the post.

Austin

Fulvio Notarstefano

This plugin extends the <a href="https://wordpress.org/plugins/json-rest-api/" rel="ugc">WordPress JSON REST API</a> with new routes for WordPress registered menus
The new routes available will be:
<ul>
<li><code>/menus</code> list of every registered menu.</li>
<li><code>/menus/<id></code> data for a specific menu.</li>
<li><code>/menu-locations</code> list of all registered theme locations.</li>
<li><code>/menu-locations/<location></code> data for menu in specified menu in theme location.</li>
</ul>
Currently, the <code>menu-locations/<location></code> route for individual menus will return a tree with full menu hierarchy, with correct menu item order and listing children for each menu item. The <code>menus/<id></code> route will output menu details and a flat array of menu items. Item order or if each item has a parent will be indicated in each item attributes, but this route won’t output items as a tree.
You can alter the data arrangement of each individual menu items and children using the filter hook <code>json_menus_format_menu_item</code>.
An important note on WP API V2:
In V1 the routes are located by default at <code>wp-json/menus/</code> etc.
In V2 the routes by default are at <code>wp-json/wp-api-menus/v2/</code> (e.g. <code>wp-json/wp-api-menus/v2/menus/</code>, etc.) since V2 encourages prefixing and version namespacing.

WP API Menus

It Does!

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

Add to Menu vs WP API Menus