IQuestService – Steam Web API Documentation

This page is just a reference of all the known Steam APIs, I do not know how they work. Please do not email me with questions.

https://api.steampowered.com/IQuestService/ActivateProfileModifierItem/v1/

Name	Value	Type	Required	Description
key	click to set	string	Yes	Access key
appid		uint32	No
communityitemid		uint64	No
activate		bool	No

https://api.steampowered.com/IQuestService/GetCommunityInventory/v1/

Name	Value	Type	Required	Description
key	click to set	string	Yes	Access key
filter_appids[0]		uint32[]	No	Filter to only community items for these apps.

https://api.steampowered.com/IQuestService/GetCommunityItemDefinitions/v1/

Name	Value	Type	Required	Description
key	click to set	string	Yes	Access key
appid		uint32	No
item_type		uint32	No
language		string	No	language short name
broadcast_channel_id		uint64	No
keyvalues_as_json		bool	No	when true, json will be returned in item_key_values

https://api.steampowered.com/IQuestService/GetNumTradingCardsEarned/v1/

Name	Value	Type	Required	Description
key	click to set	string	Yes	Access key
timestamp_start		uint32	No
timestamp_end		uint32	No

https://api.steampowered.com/IQuestService/GetVirtualItemRewardDefinition/v1/

Name	Value	Type	Required	Description
key	click to set	string	Yes	Access key
eventid		int32	No	enum
include_inactive		bool	No

Add game items to a user

https://partner.steam-api.com/IQuestService/PublisherAddCommunityItemsToPlayer/v1/

Name	Value	Type	Required	Description
key	click to set	string	Yes	Access key
steamid		uint64	Yes
appid		uint32	Yes
match_item_type		uint32	Yes
match_item_class		uint32	Yes
prefix_item_name		string	Yes
attributes		{message}	Yes
note		string	Yes
broadcast_channel_id		uint64	Yes

https://api.steampowered.com/IQuestService/SetVirtualItemRewardDefinition/v1/

Name	Value	Type	Required	Description
key	click to set	string	Yes	Access key
eventid		int32	No	enum
action		int32	No	enum
itemsdefs[0]		CVirtualItemRewardDefinition[]	No	Include only item def we are updating or adding. Don't mix adds with updates
↳ eventid		int32	No	enum
↳ item_bucket		uint32	No
↳ appid		uint32	No
↳ active		bool	No
↳ rarity		uint32	No
↳ package_to_grant		uint32	No
↳ game_item_id		fixed64	No
↳ community_item_class		int32	No
↳ community_item_type		uint32	No
↳ loyalty_point_type		uint32	No
↳ amount		int64	No
↳ rtime_time_active		uint32	No
↳ loyalty_reward_defid		uint32	No
↳ user_badge_to_grant		uint32	No
↳ user_badge_level		uint32	No
↳ virtual_item_def_id		uint32	No