A secondary interface to interact with the Steam Economy.
See also: IGameInventory.

For more info on how to use the Steamworks Web API please see the Web API Overview.

CanTrade

Name	Type	Required	Description
key	string	✔	Steamworks Web API publisher authentication key.
appid	uint32	✔	That the key is associated with. Must be a steam economy app.
steamid	uint64	✔	SteamID of user attempting to initiate a trade
targetid	uint64	✔	SteamID of user that is the target of the trade invitation

NOTE: This call requires a publisher API key to use this method. As such this API MUST be called from a secure server, and can never be used directly by clients!

FinalizeAssetTransaction

Name	Type	Required	Description
key	string	✔	Steamworks Web API publisher authentication key.
appid	uint32	✔	The app ID the user is buying assets for
steamid	uint64	✔	SteamID of the user making a purchase
txnid	string	✔	The transaction ID
language	string	✔	The local language for the user

NOTE: This call requires a publisher API key to use this method. As such this API MUST be called from a secure server, and can never be used directly by clients!

GetAssetClassInfo

Name	Type	Required	Description
key	string	✔	Steamworks Web API user authentication key.
appid	uint32	✔	Must be a steam economy app.
language	string		The user's local language
class_count	uint32	✔	Number of classes requested. Must be at least one.
classid0	uint64	✔	Class ID of the nth class.
instanceid0	uint64		Instance ID of the nth class.

GetAssetPrices

Name	Type	Required	Description
key	string	✔	Steamworks Web API user authentication key.
appid	uint32	✔	Must be a steam economy app.
currency	string		The currency to filter for
language	string		The user's local language

Returns prices and categories for items that users are able to purchase.

GetExportedAssetsForUser

Name	Type	Required	Description
key	string	✔	Steamworks Web API publisher authentication key.
steamid	uint64	✔	SteamID of user
appid	uint32	✔	The app to get exported items from.
contextid	uint64	✔	The context in the app to get exported items from.

Retrieves the list of assets from another game to import.

NOTE: This call requires a publisher API key to use this method. As such this API MUST be called from a secure server, and can never be used directly by clients!

GetMarketPrices

Name	Type	Required	Description
key	string	✔	Steamworks Web API publisher authentication key.
appid	uint32	✔	Must be a steam economy app.

NOTE: This call requires a publisher API key to use this method. As such this API MUST be called from a secure server, and can never be used directly by clients!

StartAssetTransaction

Name	Type	Required	Description
key	string	✔	Steamworks Web API publisher authentication key.
appid	uint32	✔	The app ID the user is buying assets for
steamid	uint64	✔	SteamID of user making a purchase
assetid0	string	✔	The ID of the first asset the user is buying - there must be at least one
assetquantity0	uint32	✔	The quantity of assetid0's the the user is buying
currency	string	✔	The local currency for the user
language	string	✔	The local language for the user
ipaddress	string	✔	The user's IP address
referrer	string		The referring URL
clientauth	bool		If true (default is false), the authorization will appear in the user's steam client overlay, rather than as a web page - useful for stores that are embedded in products.

NOTE: This call requires a publisher API key to use this method. As such this API MUST be called from a secure server, and can never be used directly by clients!

StartTrade

Name	Type	Required	Description
key	string	✔	Steamworks Web API publisher authentication key.
appid	uint32	✔	That the key is associated with. Must be a steam economy app.
partya	uint64	✔	SteamID of first user in the trade
partyb	uint64	✔	SteamID of second user in the trade

NOTE: This call requires a publisher API key to use this method. As such this API MUST be called from a secure server, and can never be used directly by clients!