question

>>Is there a documentation page that details the limits of each routes of the Rest API?

Currently, PlayFab does not provide a documentation page detailing the limits of each route for the REST API. If you want to know the limitations of certain APIs, you can ask in the forum.

>>Does Playfab have any recommendation to make the lobby experience seem more realtime? Does the Unreal OnlineSubsystemPlayfab provide realtime updates?

PlayFab provides Multiplayer SDK (Lobby and Matchmaking SDKs include the OnlineSubsystemPlayfab ), which have built in support for real-time notifications. You may refer to Lobby SDK Quickstart - PlayFab | Microsoft Learn.

However, even with the Multiplayer SDK, players are still subject to UpdateLobby request rate limits when they need to update their lobby. There are generally two situations when calling the Update Lobby API. One is when the lobby owner updates lobby data or access policies, etc., and the other is when other players in the lobby update member data(such as game skins, equipment held, etc.). In these two situations, the demand for updating the Lobby is usually not too high. What is the specific scenario you want to achieve? Why is UpdateLobby API called frequently?

Please remember that the rate limit of Update Lobby API is for the player, it’s not mean that the lobby can only be updated at this frequency (for example, when 2 players update the lobby, the total number of updates of the lobby in two minutes may be 40.).