Does REST Admin API preserve shipping_lines.source when creating orders via /orders.json?

GraphQL Admin API Troubleshooting
1

Hi everyone,

I’m creating duplicate Shopify orders via an automation tool using the Admin API.

Context:
The original order has a shipping line from a carrier/app:

source: "Izprati.bg"
code: "v2:..."

The shipping line represents a Speedy service point / pickup office. The carrier app later reads this data to generate the correct label.

When I duplicate the order with GraphQL orderCreate, I can copy shippingLines.title and shippingLines.code, but I cannot set shippingLines.source.

So I tried REST:

POST /admin/api/2026-01/orders.json

with payload like:

{
  "order": {
    "email": "customer@example.com",
    "line_items": [
      {
        "variant_id": 123456789,
        "quantity": 1,
        "requires_shipping": true
      }
    ],
    "shipping_address": {
      "first_name": "Test",
      "last_name": "Customer",
      "address1": "Address",
      "city": "Sofia",
      "country_code": "BG",
      "phone": "+359..."
    },
    "shipping_lines": [
      {
        "title": "0.03 km away - Speedy - SOFIA - OFFICE NAME",
        "price": "3.06",
        "code": "v2:...",
        "source": "Izprati.bg"
      }
    ],
    "metafields": [
      {
        "namespace": "octavawms",
        "key": "options_id",
        "type": "single_line_text_field",
        "value": "v2:..."
      }
    ]
  }
}

The order is created, but the carrier app does not treat it as a pickup office delivery. It creates the label as an address delivery instead.

Question:
Does Shopify REST Admin API actually preserve shipping_lines[].source when creating an order via POST /orders.json?

If not, is there any supported way to create/copy an order while preserving the original carrier/app shipping line source and code?

Or is shipping_lines.source read-only / app-generated only?

Any experience with duplicating orders that use carrier service pickup points would be appreciated.

2

You should look to move to GraphQL as the REST API is now deprecated.

3

Hi @bossorange

source is a returned field; neither REST POST /orders.json nor GraphQL orderCreate lets you set it in a way that recreates the original carrier association. Many carrier/pickup-point apps store the pickup point info in:

  • order metafields (namespace/key)
  • line item properties
  • order note attributes (note_attributes)
  • tags

One solution would be to ask the carrier Izprati.bg to support a “manual / API-created pickup order” path, or see if they offer an external API where you can:

  • send the pickup point code (v2:...),
  • order number,
  • address/contact,
  • and let their backend create the shipment and store its reference as an order metafield back into Shopify.