Monitor Playlist updates with web API?

[thomasa88]

I'm using the web api to provide updates to a chat when songs are added or removed to a specific playlist. Today, I am polling every few minutes to look for any changes in the playlist. Is there any api to get a delta either by polling or by a hook?

I would preferably like to get info on who did the change to the playlist.

[DisappointedUser1]

Not possible anymore, point 8. 
Introducing some changes to our Web API | Spotify for Developers

[LambertSpot]

Hi! There is no publicly available Webhook or WebSocket today, but it is something we are considering.

[thomasa88]

Hi, what's the status on this?

In the meantime, what are the rate limits to playlist/<id> and playlist/<id>/tracks endpoints? I'm currently grabbing a two page playlist every 2 minutes to compensate for the lack of events. When I had the interval to 2 polls every 10 seconds, I remember not getting 429, but some other error (no response?) and being blocked for hours.

I have tried to use snapshot_id to avoid having to grab the full playlist when polling, but it does not seem to update reliably.
edit: It looks like it can take at least a minute for the snapshot ID to change.

edit: I tried looking up the playlist/<id> endpoint every 10 seconds, so 3 requests per 30 second window. Interestingly, this works for 1-2 days before getting HTTP 429 error responses. So the error code is right, but the rolling 30 seconds window seems to be a lie, since I kept the same rate over a lot of 30 second windows.