You can download nupkg files by navigating directly to the url using the syntax: nuget.org/api/v2/package/<xyw> where <xyz> is the name of the package you are seeking e.g. nuget.org/api/v2/package/NuGet.CommandLine. You can also request earlier versions of the package by specifying the version in the url e.g. http://www.nuget.org/api/v2/package/NuGet.CommandLine/2.8.6/
