You can add this website http://www.oseox-monitoring.biz/ to your account (Oseox Monitoring - Oseox Link - Oseox Sitemap).
For example you can monitor TITLE, META DESCRIPTION, META ROBOTS, X-Robots-Tag, HTTP HEADER, CANONICAL, HTTP CANONICAL, CONTENT, Analytics TAG...
All tags, HTTP headers and content change constantly !
You can also add this URL http://www.oseox-monitoring.fr/?123 in order to understand how the software works.
Oseox <-- This link change often too :-)
Tutorials : Oseox Software - Learn SEO : Oseox