Webhook "zoomroom.thirdparty_meeting_attempted" is not sending when calling 3rd party service from Zoom Room

We need to analyze 3rd party services calls placed from our Zoom Rooms (manual input and scheduled ones) in the moment they are attempted.

I’ve registered a Webhook-Only app, validated an endpoint, subscribed zoomroom.thirdparty_meeting_attempted events. But I don’t receive any webhooks when I place 3rd party service calls from Zoom Room controller interface. I’ve tried both external SIP videoconferencing service and Google Meet. I’ve also tried several Zoom Rooms. No luck. Silence in terms of webhooks, while the 3rd party service connection is established successfully, everything is fine.

If I subscribe the same endpoint to other events like meetings start/end or room sensors I do receive the corresponding webhooks normally.

So what might be wrong with zoomroom.thirdparty_meeting_attempted webhook?

Hi @pro-alex
Thanks for reaching out to us and welcome to our Zoom Developer Community!
I can take a closer look at this issue.
To do so, I will send you a DM to request more data about this issue, including examples. Please make sure to follow up there
Cheers,
Elisa