NuGet/NuGetGallery — comment on commit d71e5e99ac5d53078d7f3436a17e6b365975c438
File: Website/App_Start/Routes.cs line 101
By pranavkm:

Not sure about the PUT part. According to this discussion on SO - http://stackoverflow.com/questions/630453/put-vs-post-in-rest - a PUT is supposed to be idempotent, however in our case you're allowed to create a package exactly once.