EventSub WebSockets are now available in open beta

A single websocket can have 10 cost 1 subscriptions on it.
So you will run into that limit first

This sounds more like you want the regular/webhooks transport than the sockets transport for this use case.

And without auth you’d only be able to monitor

3 sockets
10 cost 1 topics per socket
2 topics (stream up/down)

(3*30 / 2)

so 15 channels…

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