Calls shown via the official C++ SDK (compiled into your UE module). Blueprint projects: same endpoints over FHttpModule/VaRest — see Getting Started.
Updates::updatePlayers(client, playerToken, type, data, {target, targetIds?})Typed durable state update to a target set.
Updates::pollUpdates(client, playerToken, {fromPlayers?, lastUpdate?})Reads updates since lastUpdate, optionally filtered by source.