I need to get prices for some items from market to analyze them after. All i found that using some steam-site methods that results json response (like http://steamcommunity.yuanyoumao.com/market/priceoverview/?currency=5&appid=730&market_hash_name=FAMAS%20%7C%20Spitfire%20%28Minimal%20Wear%29 or http://steamcommunity.yuanyoumao.com/market/search/render/?query=&start=0&count=100&appid=730&currency=3&l=english&country=US ) but i am afraid to get banned by often requests. Also, for some reason, sometimes requests to them from my application results 403 or 500 status code and no relevant response.
Is there any api for steam market? Also where i can found list of all cs go items? I already gathered all paints except for knives from items_game.txt, but i need to know which of them have stattrak/souvenir version and which qualities of painting they have (some have only factory new for example).