Yes, you’re fine using it that way. If outbound works after switching the webhook back to your server, it won’t affect create_call().
VAPI usually only changes the webhook during import. It shouldn’t keep overriding it unless you reconnect or re-import the number.
For production, either use separate numbers (cleanest setup), or
Keep your current setup and just monitor the webhook so nothing changes unexpectedly.
I can help you set it up properly and make sure it’s stable long term.
Can I ?