How to update stock levels for Gelato app location using Shopify GraphQL mutations

Other Questions Shopify
1

I’m working with Shopify’s GraphQL API (2024-10 version) and need help updating inventory for products connected to the Gelato print-on-demand app.

I have a location selector that shows available warehouses, and I’m trying to integrate with Gelato’s fulfillment system. When I query for locations using this GraphQL:

warehouses(first: 10) {
  edges {
    node {
      gid
      title
    }
  }
}

The results don’t include app-managed locations like Gelato’s fulfillment centers. I can see the Gelato location in my admin panel settings, but it’s not appearing in my API response.

What’s the correct GraphQL query to fetch app-based locations so I can update inventory quantities for Gelato-managed products? I need to programmatically set stock levels for these external fulfillment locations.

2

Had the same issue with print-on-demand services. App-managed locations use different GraphQL endpoint structures. Query fulfillmentServices first to grab Gelato’s service ID, then use that for inventory levels. This worked for me:

fulfillmentServices(first: 50) {
  edges {
    node {
      id
      serviceName
      handle
    }
  }
}

Once you’ve got Gelato’s fulfillment service ID, reference it in inventory mutations. But heads up - most POD apps block direct inventory updates through Shopify’s API. They auto-sync based on production capacity. Check Gelato’s docs first because forcing stock updates might break their automated system.

3

check your api scope for location access - some apps like gelato need specific permissions to see fulfillment nodes. pod inventory is virtual anyway since they make everything on-demand, so there aren’t real stock counts. you’ll probably need to use gelato’s webhook system instead of trying to update through graphql directly.

4

App-based fulfillment locations don’t appear in standard warehouse queries; they utilize different API endpoints. To access Gelato’s managed locations, use the locations query with specific filters. However, be aware that direct inventory updates through GraphQL often fail with print-on-demand integrations, as these applications manage their own stock systems. Gelato likely syncs inventory automatically based on production capacity, not manual changes you submit. It’s essential to review Gelato’s developer documentation to confirm if they permit external inventory modifications, as most print-on-demand services maintain stock levels as read-only to prevent conflicts with their fulfillment system.

5

gelato locations won’t show up in warehouse queries - the app manages those separately. try the locations query instead of warehouses. that’s where app fulfillment centers usually live. also worth checking if gelato has its own API endpoints for inventory updates. some apps handle stock totally different from shopify’s native system.