# Update a parcel line item

To [update](https://docs.commercelayer.io/core/updating-resources) an existing parcel line item, send a `PATCH` request to the `/api/parcel_line_items/:id` endpoint, where `id` is the ID of the resource that you want to update.

Here below the list of all the possible arguments that you can pass with the request body.

## Request

**PATCH** <https://yourdomain.commercelayer.io/api/parcel\\_line\\_items/:id>

### Arguments

| Body Parameter                   | Type     | Required |
| -------------------------------- | -------- | -------- |
| **type**                         | `string` | Required |
| **id**                           | `string` | Required |
| attributes.**reference**         | `string` | Optional |
| attributes.**reference\_origin** | `string` | Optional |
| attributes.**metadata**          | `object` | Optional |

### Example

{% tabs %}
{% tab title="Request" %}
The following request updates the parcel line item identified by the ID "XAyRWNUzyN":

```shell
curl -g -X PATCH \
  'https://yourdomain.commercelayer.io/api/parcel_line_items/XAyRWNUzyN' \
  -H 'Accept: application/vnd.api+json' \
  -H 'Authorization: Bearer your-access-token' \
  -H 'Content-Type: application/vnd.api+json' \
  -d '{
  "data": {
    "type": "parcel_line_items",
    "id": "xYZkjABcde",
    "attributes": {
      "reference": "ANY-EXTERNAL-REFEFERNCE"
    }
  }
}'
```

{% endtab %}

{% tab title="Response" %}
On success, the API responds with a `200 OK` status code, returning the updated resource object:

```json
{
  "data": {
    "id": "XAyRWNUzyN",
    "type": "parcel_line_items",
    "links": {
      "self": "https://yourdomain.commercelayer.io/api/parcel_line_items/XAyRWNUzyN"
    },
    "attributes": {
      "sku_code": "TSHIRTMM000000FFFFFFXLXX",
      "bundle_code": "BUNDLEMM000000FFFFFFXLXX",
      "quantity": 4,
      "name": "Men's Black T-shirt with White Logo (XL)",
      "image_url": "https://img.yourdomain.com/skus/xYZkjABcde.png",
      "created_at": "2018-01-01T12:00:00.000Z",
      "updated_at": "2018-01-01T12:00:00.000Z",
      "reference": "ANY-EXTERNAL-REFEFERNCE",
      "reference_origin": "ANY-EXTERNAL-REFEFERNCE-ORIGIN",
      "metadata": {
        "foo": "bar"
      }
    },
    "relationships": {
      "parcel": {
        "links": {
          "self": "https://yourdomain.commercelayer.io/api/parcel_line_items/XAyRWNUzyN/relationships/parcel",
          "related": "https://yourdomain.commercelayer.io/api/parcel_line_items/XAyRWNUzyN/parcel"
        }
      },
      "stock_line_item": {
        "links": {
          "self": "https://yourdomain.commercelayer.io/api/parcel_line_items/XAyRWNUzyN/relationships/stock_line_item",
          "related": "https://yourdomain.commercelayer.io/api/parcel_line_items/XAyRWNUzyN/stock_line_item"
        }
      },
      "versions": {
        "links": {
          "self": "https://yourdomain.commercelayer.io/api/parcel_line_items/XAyRWNUzyN/relationships/versions",
          "related": "https://yourdomain.commercelayer.io/api/parcel_line_items/XAyRWNUzyN/versions"
        }
      },
      "event_stores": {
        "links": {
          "self": "https://yourdomain.commercelayer.io/api/parcel_line_items/XAyRWNUzyN/relationships/event_stores",
          "related": "https://yourdomain.commercelayer.io/api/parcel_line_items/XAyRWNUzyN/event_stores"
        }
      }
    },
    "meta": {
      "mode": "test",
      "organization_id": "xRRkjDFafe",
      "trace_id": "69abaa3545913c78132e5578bd26208d44aa9043647d78698fd0021f3958cd74"
    }
  }
}
```

{% endtab %}
{% endtabs %}