List of chat commands:

!check - this command check number of badges, that you can craft from cards, that the bot has in inventory

!level X - this command calculate how many card sets you need for X level

!buy X - this command requesting trade offer for X amount of your keys, for sets that you don’t have crafted at the current exchange rate. Maximum amount of keys in a single trade is 10.
If you have just purchased few sets from the Bot, make sure to craft them first, before to buy more!

!buyany X - this command requesting a trade offer for any amount of sets, even those that you already have crafted

!help - list of all commands that you need