Make callbackUrl Optional in Fulfillment Updates

Executive summary:

• Shopify Admin API 2026-01 update makes callbackUrl optional.
• Improves flexibility for developers managing fulfillment services.
• Beneficial for apps focusing on inventory or tracking without callbacks.

What changed

The callbackUrl argument in the fulfillmentServiceCreate and fulfillmentServiceUpdate mutations in Shopify's 2026-01 Admin API release is no longer mandatory. Apps can now manage fulfillment services without specifying a callback URL.

Why it matters

This change enhances the flexibility of fulfillment service integrations by allowing apps to choose whether to use callbackUrl. Shopify Plus merchants can streamline setup processes by focusing on their inventory or tracking features without configuring unnecessary callbacks.

Role-specific impact

• Marketers: Can benefit from reduced setup complexity, especially when managing promotional events requiring quick changes in fulfillment operations.
• Developers: Gain the ability to simplify fulfillment service API setups for apps focused on inventory management or tracking without handling callbacks.
• Store admins: Easier to coordinate fulfillment tasks, allowing focus on core operations like inventory and order tracking rather than technical configurations.

Use-case example

Real-world scenario & metric

A merchant develops a Shopify app managing multiple warehouses without needing URL-based fulfillment requests. By removing the callbackUrl dependency, the app deployment time decreases by 30%, enabling faster go-to-market strategies.

Implementation checklist

1. Review your existing app integrations for callbackUrl dependencies.
2. Identify if your app needs callbackUrl for order fulfillment actions.
3. Update app configurations to omit the callbackUrl if not required.
4. Test the fulfillment setup in a development environment, ensuring inventory and tracking features execute via API.
5. Deploy changes and monitor app performance closely for potential adjustments.

FAQ

Q: What should I do if my app still requires callbackUrl?
A: If callbackUrl remains a requirement, your app will continue to function as before without modification.

Q: How does this change affect inventory and tracking operations?
A: You can now manage these through API calls, reducing dependency on callback configurations.

Resources

For more detailed guidance, see our fulfillment services documentation.

Need guidance? Talk to Makro.