d43ac381_Monitoring_nuget_org__Purpose
[Check] package restore (download) [Interval] 1 minute [Notify when down] 3 minutes [Purpose] 
We use an unlisted NuGet.GalleryUptime package to verify that packages can be downloaded by the package restore process. This operation records package download statistics and then serves the actual nupkg file. If this check is down, builds using package restore will fail.
Monitoring nuget.org
Purpose