Calls shown via the official C++ SDK (compiled into your UE module). Blueprint projects: same endpoints over FHttpModule/VaRest — see Getting Started.
Friends::getFriends(client, playerToken)
Friend list with presence.
Friends::lookupPlayerByTag(client, playerToken, playerTag)
Finds a player by Name#tag.
Friends::sendFriendRequest(client, playerToken, {tag or id})
Sends a friend request.
Friends::acceptFriendRequest(client, playerToken, playerId)
Friends::declineFriendRequest(...)
Friends::removeFriend(client, playerToken, playerId)
Answer requests / manage the list.
Friends::lookupSteamFriends(client, playerToken, steamIds)
Imports Steam friends by SteamID64 — pairs with the SDK's Steam ticket helpers (see /cpp/).
Friends::inviteFriend(client, playerToken, playerId)
Friends::getInvites(client, playerToken)
Friends::acceptInvite / declineInvite
Game/room invite flow — send, list, answer by invite_id.