I have the holographic kitten that you purchase from Holomancer Netto in Rata Sum in my home instance. However, GW2efficiency.com, the GW2 wiki, and GW2timer.com all show that I am missing the holographic kitten when I plug in my API key. When I go back to Holomancer Netto, I do not have the option to buy the kitten, and I do remember purchasing it back when it was first added to the game. I have tried creating a new API key to see if it was just something with mine, but I got the same results with it.
Since all 3 web sites are showing the same results, I suspect there is either an issue with my account or with the API.