I'm not sure if this is just now broken or has not yet been supported, but the AppVeyor account feed is not working with this format.
https://www.nuget.org/api/v2/Packages(Id='Elmah',Version='1.2.2')
This format is used extensively by `paket.exe update`. I have a Fiddler capture with examples that I can send via email.

#1 Posted by Feodor Fitsner Support staff on 21 Oct, 2014 05:27 PM
Yes, please send examples.
What is
paket.exe?#2 Posted by Cameron Taggart on 21 Oct, 2014 06:51 PM
We tracked down the issue to case sensitivity. The correct package name is
elmah, being all lowercsae. I think AppVeyor should be case insensitive like nuget.org is. Both should work:https://www.nuget.org/api/v2/Packages(Id='Elmah',Version=&#...
https://www.nuget.org/api/v2/Packages(Id='elmah',Version=&#...
#3 Posted by Cameron Taggart on 21 Oct, 2014 06:53 PM
https://www.nuget.org/api/v2/Packages(Id='Elmah',Version='1.2.2')https://www.nuget.org/api/v2/Packages(Id='elmah',Version='1.2.2')#4 Posted by Feodor Fitsner Support staff on 21 Oct, 2014 06:57 PM
Coo, will fix that!
#5 Posted by Feodor Fitsner Support staff on 24 Oct, 2014 04:44 AM
The fix has been deployed.
Cameron Taggart closed this discussion on 28 Oct, 2014 09:36 PM.