trogau

You can query core, plugin, and themes individually, or check all at once.
It defines four new methods:
<ul>
<li>xmlrpcCoreUpdateCheck – checks core, returns true/false</li>
<li>xmlrpcPluginUpdateCheck – checks plugins, returns true/false</li>
<li>xmlrpcThemeUpdateCheck – checks themes, returns true/false</li>
<li>xmlrpcUpdatesCheck – checks all of the above, returns an array of trues/falses.</li>
</ul>
The plugin was created primarily for WPUpCheck (http://trog.qgl.org/wpupcheck/), a simple 
Windows application that remotely polls a WordPress site to see if updates are available.

XML-RPC Update Check

This plugin provides XML-RPC methods for checking the update status of WordPress websites.

Dor Zuberi

Light and customisable WordPress plugin to integrate your site with Slack.
Choose what type of notification you would like to receive: 
* WordPress Update Available 
* Plugins Updates Available 
* Administrator Login 
* Failed Administrator Login 
* New User Registration 
* New Comments 
* Nee WooCommerce Orders 
* WooCommerce Product with Low Stock 
* And much more!
You can contribute by simple <a href="https://github.com/dorzki/Slack-Notifications" rel="nofollow ugc">Forking me on GitHub</a>.

Slack Notifications by dorzki

Thank you for this amazing plugin! Works great.

Excellent Plugin!

Get WordPress notifications to your team's Slack channel.

XML-RPC Update Check vs Slack Notifications by dorzki