Guild Wars 2 is a MMORPG and GW2Spidy is an online trading post where players can purchase items. Players can use their game account to login and view all the items and listings. An API is available that makes the site data available for use in other websites and applications. Methods available include Type List, Discipline List, Rarity List, Item List, Item Data and more. The API uses RESTful calls and responses are formatted in JSON, JSONP and CSV.