Get navigation menu as post type

I’m trying to get the navigation menu as JSON data.

From WordPress codex: navigation menu is treated as a post type.

From Rest API Doc, this is how we get posts of a type:

GET http://demo.wp-api.org/wp-json/wp/v2/types/<type>

I tried to get it like so:

URL : http://localhost/wptest/wp-json/wp/v2/types/nav_menu_item

I received 403 error.

{"code":"rest_cannot_read_type","message":"Cannot view type.","data":{"status":403}}

the server understood my request but it refused to give the data.

Q: How can I fix this?

https://wordpress.org/plugins/rest-api/