digitalissimo

If you need to get the information from another site or your site using JSON API (https://wordpress.org/plugins/json-api/) you can use this plugin. 
For slideshow this plugin use Cycle2 (http://jquery.malsup.com/cycle2).
<h4>Shortcode</h4>
<pre><code>[getapi url="www.mysite.com" limit="5" type="[CYCLE or LIST]"]:
</code></pre>
<ul>
<li>
url: url before ?json=get_recent_posts
</li>
<li>
limit: number element of json result
</li>
<li>
type: “Cycle” is a slideshow of thumbs or “List” is the list of post titles
</li>
</ul>

Get Json Api

Retrieve the results of the API of a site that uses the plugin JSON API

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

Get Json Api vs JSON API Delete User