Listings API putListingsItem How To Update price and quantity?

All I want to do is use the Amazon SP-API Listings API’s putListingsItem call to update the price and quantity of an item I have listed.

productType

According to the ListingsItemPutRequest docs, productType and attributes are required for this call.

Firstly, to obtain the correct productType value, you are supposed to search for a product definitions type using the Product Type Definitions API. So, I do that, and call searchDefinitionsProductTypes, just to discover my product has no matching product type.

Ultimately, I gave the value PRODUCT for productType field. Using PRODUCT, I made the getDefinitionsProductType call and got an object containing an array of propertyNames, shown below:

        "propertyNames": [
            "skip_offer",
            "fulfillment_availability",
            "map_policy",
            "purchasable_offer",
            "condition_type",
            "condition_note",
            "list_price",
            "product_tax_code",
            "merchant_release_date",
            "merchant_shipping_group",
            "max_order_quantity",
            "gift_options",
            "main_offer_image_locator",
            "other_offer_image_locator_1",
            "other_offer_image_locator_2",
            "other_offer_image_locator_3",
            "other_offer_image_locator_4",
            "other_offer_image_locator_5"
        ]
    },

On seeing this, I decide list_price and fulfillment_availability must be the price and quantity and then try using these in my code below.

attributes

The attributes value is also required. However, their current docs show no clear example of what to put for these values, which are where I must put price and quantity somewhere.

I found this link about patchListingsItem and tried to implement that below but got an error.

code:

// trying to update quantity… failed.

    a.response =  await a.sellingPartner.callAPI({
        operation:'putListingsItem',
        path:{
          sellerId: process.env.SELLER_ID,
          sku: `XXXXXXXXXXXX`
        },
        query: {
          marketplaceIds: [ `ATVPDKIKX0DER` ]
        },
        body: {
          "productType": `PRODUCT`
          "requirements": "LISTING_OFFER_ONLY",
          "attributes": {
                "fulfillment_availability": {
                    "fulfillment_channel_code": "AMAZON_NA",
                            "quantity": 4,
                            "marketplace_id": "ATVPDKIKX0DER"
                        }
                    }
      });

    console.log( `a.response: `, a.response )

error:

{
	"sku": "XXXXXXXXXXXX",
	"status": "INVALID",
	"submissionId": "34e1XXXXXXXXXXXXXXXXXXXX",
	"issues": [{
		"code": "4000001",
		"message": "The provided value for 'fulfillment_availability' is invalid.",
		"severity": "ERROR",
		"attributeName": "fulfillment_availability"
	}]
}

I also tried using list_price :

// list_price attempt… failed.

    a.response =  await a.sellingPartner.callAPI({
        operation:'putListingsItem',
        path:{
          sellerId: process.env.SELLER_ID,
          sku: `XXXXXXXXXXXX`
        },
        query: {
          marketplaceIds: [ `ATVPDKIKX0DER` ]
        },
        body: {
          "productType": `PRODUCT`
          "requirements": "LISTING_OFFER_ONLY",
          "attributes": {
                "list_price": {
                    "Amount": 90,
                    "CurrencyCode": "USD"
                }
      });

    console.log( `a.response: `, a.response )

Error (this time seems I got warmer… maybe?):

{
	"sku": "XXXXXXXXXXXX",
	"status": "INVALID",
	"submissionId": "34e1XXXXXXXXXXXXXXXXXXXX",
	"issues": [{
		"code": "4000001",
		"message": "The provided value for 'list_price' is invalid.",
		"severity": "ERROR",
		"attributeName": "list_price"
	}]
}

How do you correctly specify the list_price or the quantity so this call will be successful?

Just tryin to update a single item’s price and quantity.