For others reading this post: The error was due to too frequent token updates. We had 4 worker thread sharing the same HttpClient sending notifications to APNs. Instead of sharing the JWT Token they all maintained their own (refreshing every 20 mins), causing the 429 response code. We only logged the status code so it looked like we were throttled. https://developer.apple.com/documentation/usernotifications/handling-notification-responses-from-apns#Understand-error-codes Thanks for the support @Argun.

Hi Argun, Our Bundle ID doesn't match the above. It's: com.m__________e.f_______o This is a live score app for football (soccer). I checked the logs from yesterday and I can't see that we're sending notifications too frequent. We sent a total of 10 notifications for one of the games yesterday at these times: 2024-07-10T17:01:15.3213590Z 2024-07-10T17:18:32.9094852Z 2024-07-10T17:37:39.1622861Z 2024-07-10T17:52:00.8026556Z 2024-07-10T18:05:56.6542415Z 2024-07-10T18:15:50.5259535Z 2024-07-10T18:36:11.2406366Z 2024-07-10T18:46:46.0640576Z 2024-07-10T18:52:10.7170653Z 2024-07-10T19:01:33.9505385Z There are several minutes between each push but we still got two throttles: 2024-07-10T18:52:10.8535674Z 2024-07-10T19:01:34.0837425Z I'm assuming the rate limit is per channel. Even looking across all channels we sent to at the time we got a 429 error I don't see why we would get it: 2024-07-10T18:55:46.449Z - TAJdlj2GEe8AAErsQhdY4w== 2024-07-10T19:00:28.570Z - TE6ByT2GEe8AAErsQhdY4w== 2024-07-10T19:00:48.331Z - S+hs9T2GEe8AAErsQhdY4w== 2024-07-10T19:01:29.158Z - TDUtaD2GEe8AAErsQhdY4w== 2024-07-10T19:01:33.950Z - znqayz1kEe8AANJjTmHR9Q== 2024-07-10T19:04:05.323Z - TAJdlj2GEe8AAErsQhdY4w== Yesterday was a slow day for football/soccer, so this is a bit worrying. Also, we have a very limited set of users in the "Development" environment. We have a lot of users in production though, so we're afraid of rolling out this feature as it stands. We're using Live Activities extensively and sent 534,818 Live Activity Start notifications for the Euro Semi-finale match between Netherlands - England yesterday. Btw, will the regular Live Activity sending affect the rate limit of broadcast notifications in any way? Today each device will register itself with our server after we send a Live Activity Start. The plan is to have them register on the broadcast channel instead. Is there any rate limiting for clients registering on a topic/channel id? The reason I'm asking is that the traffic will be very spiky. With the example above, we'll send 500K LA Start that will be followed by all the devices registering on the channel for the given match. Best regards, -Tommy