IFriendMessagesService – Steam Web API Documentation

UNDOCUMENTED

Get information about recent offline messages and chats

https://api.steampowered.com/IFriendMessagesService/GetActiveMessageSessions/v1/

Name	Value	Type	Required	Description
key	click to set	string	Yes	Access key
lastmessage_since		uint32	No	return only session information where a chat message has been sent since this time (for polling)
only_sessions_with_messages		bool	No	If non-zero, return only message sessions that have messages since our message cutoff. If zero, we return all active sessions.

UNDOCUMENTED

Get a log of recent chat messages between two users

https://api.steampowered.com/IFriendMessagesService/GetRecentMessages/v1/

Name	Value	Type	Required	Description
key	click to set	string	Yes	Access key
steamid1		fixed64	No
steamid2		fixed64	No
count		uint32	No	If non-zero, cap the number of recent messages to return.
most_recent_conversation		bool	No	Grab the block of chat from the most recent conversation (a ~5 minute period)
rtime32_start_time		fixed32	No	If non-zero, return only messages with timestamps greater or equal to this. If zero, we only return messages from a recent time cutoff.
bbcode_format		bool	No	Return the results with bbcode formatting.
start_ordinal		uint32	No	Combined with start time, only messages after this ordinal are returned (dedupes messages in same second)
time_last		uint32	No	if present/non-zero, return only messages before this.
ordinal_last		uint32	No

UNDOCUMENTEDPOST

https://api.steampowered.com/IFriendMessagesService/MarkOfflineMessagesRead/v1/

Name	Value	Type	Required	Description
key	click to set	string	Yes	Access key
steamid_friend		fixed64	No

UNDOCUMENTEDPOST

https://api.steampowered.com/IFriendMessagesService/ResolveReport/v1/

Name	Value	Type	Required	Description
key	click to set	string	Yes	Access key
steamid_from		fixed64	No
steamid_to		fixed64	No
subject_group_id		uint64	No
subject_id		uint64	No
resolution		int32	No	enum
reason		int32	No	enum
skip_lock		bool	No