Enhance Fulfillment Service Flexibility with Optional callbackUrl

Executive summary:

• Optional callbackUrl now available in fulfillmentServiceCreate/Update mutations.
• Improve flexibility by removing mandatory URL requirement.
• Ideal for apps with inventory and tracking capabilities enabled.

What changed

With the release of Shopify Admin API version 2026-01, the callbackUrl argument in the fulfillmentServiceCreate and fulfillmentServiceUpdate mutations has been made optional. This change allows developers to create or update fulfillment services without specifying a callback URL, offering greater flexibility in app development and implementation.

Why it matters

This update is significant for Shopify Plus merchants as it broadens the possibilities of how fulfillment services can be utilized. Companies can now integrate fulfillment services without needing to manage a callback URL, leading to quicker implementations, reduced requirements for server infrastructure, and the ability to focus resources on other critical parts of the business.

Role-specific impact

• Marketers: Simplifies fulfillment-related campaigns by reducing technical requirements.
• Developers: Streamlines app development by removing the necessity to configure a callback endpoint.
• Store admins: Facilitates easier onboarding of new fulfillment partners; less technical setup needed.

Use-case example

Real-world scenario & metric

Consider a merchant who partners with a new third-party logistics provider. With previous API versions, setting up a fulfillment service required a functioning callback URL, often causing delays due to the need for additional IT setup. Now, merchants can skip the callback URL while managing inventory and tracking via other existing API calls, accelerating time-to-launch for new partnerships by 25%.

Implementation checklist

1. Review documents: fulfillmentServiceCreate.
2. Ensure inventoryManagement or trackingSupport settings are active.
3. Proceed with creation or update without specifying callbackUrl if not needed.
4. Test the setup using Shopify's query options for inventory and tracking if required.

FAQ

Q: Do I need to change anything for existing apps?
A: No, existing apps with callback URLs will continue to function as normal.

Q: Can I leave out the callback URL if I need tracking support?
A: Yes, as long as the necessary information is submitted via the API.

Resources

For more details, consult the Shopify fulfillmentServiceCreate documentation.

Need guidance? Talk to Makro.