arminmeth

While WordPress is slowly but surely becoming a complete application framework and JSON REST API is huge step in this direction, there is a large number of WordPress users that do not need advanced features like those offered by WordPress JSON REST API. This plugin helps them to turn those advanced features off and not worry about it.
While other similar plugins disable JSON REST API functionality only for anonymous users, Kill JSON REST API completely disables the framework for all users and removes links and tags from head element.

Kill JSON REST API

Completely disables JSON REST API for both registered and anonymous users in WordPress 4.7.* and removes API links and tags.

aiyaz Khorajia

JSON API DELETE USER extends the JSON API Plugin with a new Controller to delete user with meta data.
<h3>Documentation</h3>
<ul>
<li>
You need to create nonce to delete user, nonce can be created by calling http://localhost/api/get_nonce/?controller=user&method=delete_user_with_meta
</li>
<li>
You can then use ‘nonce’ value to delete user.
</li>
</ul>
= Method: delete_user_with_meta=
You can find example.php file to understand delete user api call via curl.
http://localhost/wordpress/api/user/delete_user_with_meta?email=example@domain.com

JSON API Delete User

Delete User with meta details add-ons for JSON API

Kill JSON REST API vs JSON API Delete User