Getting all existing skins name of items from Steam game CSGO

I'm trying to extract information on all existing items/skins of a specific Steam game available on the Steam market; example with CSGO: http://ift.tt/1nGoxJ4

I succeeded in getting all items info as long as I have the specific classid using ISteamEconomy, but is there a way to get all items' classid from the market page (in json, to the extent available)?

Thanks!