There are 2 endpoints for this API.
Start = 0 (starting of the list)
Count = 10 (Max value is 100, limited by Steam itself.)
Country = US (For now only US is available)
This will provide a list of App_IDs that you can use in the /games_data/ endpoint to get the game data.
This will provide you with the Games data such as Discount Percent, Original Price, Current Price, Title of Game, Steam URL for the Game.