IRemoteClientService

UNDOCUMENTEDPOST

https://api.steampowered.com/IRemoteClientService/NotifyRegisterStatusUpdate/v1/

Name	Value	Type	Required	Description
key	click to set	string	Yes	Access key
session_id		fixed64	No
steamid		fixed64	No
device_id		fixed64	No

UNDOCUMENTEDPOST

Send a packet to a Steam client

https://api.steampowered.com/IRemoteClientService/NotifyRemotePacket/v1/

Name	Value	Type	Required	Description
key	click to set	string	Yes	Access key
session_id		fixed64	No
steamid		fixed64	No
payload		bytes	No

UNDOCUMENTEDPOST

Unregister for status updates with a Steam client

https://api.steampowered.com/IRemoteClientService/NotifyUnregisterStatusUpdate/v1/

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

Steam Web API Documentation