Q:

Get list of WP Updates Across Sites

Is there a way to query a WP site to see the number of updates currently available?  I'm not really looking for a list of the actual updates, just the number.  This would be the total number of Plugin/Theme/Core updates, like it is listed in the WP admin menu.
I manage multiple WP sites across multiple servers and would like an easier way of knowing when updates are available, rather than checking them individually.

A:

Old question but, I wanted to post this here for reference, since I never accepted an answer.
This functionality is now easily achieved using the Jetpack centralized dashboard. You can administer updates to all your connected WP sites.
http://jetpack.me/2014/12/16/jetpack-3-3-a-single-home-for-all-your-wordpress-sites/

