This is regarding the inventory webhook endpoint :
When an order is created, the inventory.count.updated is not being fired.
Does the inventory webhook only fire when the inventory is updated through the seller dashboard?
Please assist.
Was the order paid for? 
No, I created the order using the API. But it was in production.
Okay, that’s why they aren’t firing. The order will need to be paid for to have the webhook event fire.
Ah! Okay, thank you. But is there any way for me to test without actually making the payment?
Yes, you can send a test inventory.count.updated event from the Developer Dashboard where you subscribed to the event. You’ll click on your subscription and then click More⌄.