Thanks for reaching out about this, and welcome to our Developer Community!
In regards to your OAuth App’s event subscriptions (webhooks), can you confirm that the endpoint you’ve designated to receive Zoom payloads at is:
- Publicly Accessible
- Returns a 200 OK response upon receipt (Any other response will cause event webhooks to silently fail)
- Your OAuth App has been installed on your account and the events that you’ve subscribed to have actually occurred?
If you’ve double checked these items, can you let me know if it’s possible to share the endpoint you’re using to receive our webhooks at? I’m happy to take a closer look.