Not Receiving Fulfillment Requests at /fulfillment_order_notification/ Endpoint

[order_sv]

Hi everyone,

I’m developing a fulfillment service app by following the official Shopify documentation here:
Shopify Fulfillment Service Guide

I’ve successfully completed the first two steps:

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Step 1: Create a Fulfillment Service
I used the fulfillmentServiceCreate mutation and set a callback URL, for example:
https://mydomain.com/shopify/FulfillmentRequest/

Step 2: Add and Update Location
I called the locationEdit mutation to configure and update my location successfully.

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Issue with Step 3: Receive Fulfillment Requests and Cancellations
According to the docs, Shopify should send fulfillment requests to:
<callback_url>/fulfillment_order_notification/

I’ve created and exposed the /fulfillment_order_notification/ endpoint properly, for example:
https://mydomain.com/shopify/FulfillmentRequest/fulfillment_order_notification/

However, when a merchant triggers a fulfillment request in the Shopify admin, the request is being sent to the base callback URL only, i.e.:
https://mydomain.com/shopify/FulfillmentRequest/
…and nothing is hitting the /fulfillment_order_notification/ path.

Because of this, I never receive the expected payload like:

json

CopyEdit

{ "kind": "FULFILLMENT_REQUEST" }

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Problem When Skipping Step 3
If I try to skip this webhook handling step and directly call the fulfillmentOrderAcceptFulfillmentRequest mutation, I get the following response:

json

CopyEdit

{
  "data": {
    "fulfillmentOrderAcceptFulfillmentRequest": {
      "fulfillmentOrder": null
    }
  }
}

So it seems that the mutation fails silently since the app didn’t first receive or process the actual request notification.

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What I Need Help With:

• Why isn’t Shopify sending the FULFILLMENT_REQUEST or CANCELLATION_REQUEST payloads to my /fulfillment_order_notification/ endpoint?
• Are there any additional steps, webhook subscriptions, or permissions required to get these requests?
• Is there a way to debug or force Shopify to send those fulfillment requests again?
• Also, in the Shopify admin, I don’t see the “Request Fulfillment” button. Instead, I only see a “Fulfill Item” button. Does this mean something is misconfigured with my fulfillment service setup?

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I’ve double-checked my endpoint and logs, and everything seems to be working fine on my side. Any guidance or suggestions would be greatly appreciated!

Thanks in advance