Using the Inventory API

Step 1 - Query product variants (Get Inventory Variants endpoint)

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curl 'https://www.wixapis.com/stores/v2/inventoryItems/product/{productId}/getVariants' -H 'Content-Type: application/json' -H 'Authorization: XXX'

From the result, you can see whether inventory is being tracked for this product:

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{
  "inventoryItem": {
    "id": "f8753103-0b3a-b24a-4931-50de280ac31a",
    "externalId": "078acefc-f4c5-4db5-b6ce-af21d7f53ce5",
    "productId": "078acefc-f4c5-4db5-b6ce-af21d7f53ce5",
    "trackQuantity": true,
    "variants": [
      {
        "variantId": "00000000-0000-0000-0000-000000000000",
        "inStock": true,
        "quantity": 4
      }
    ],
    "lastUpdated": "2020-08-31T20:05:40.348Z",
    "numericId": "1598904314932014"
  }
}

Step 2 - Update a specific variant of a product (Update Inventory Status endpoint)

Update whether the product inventory is tracked:

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curl 'https://www.wixapis.com/stores/v2/inventoryItems/product/{productId}' -X PATCH --data-binary '{"inventoryItem": {"trackQuantity": false}}' -H 'Content-Type: application/json' -H 'Authorization: XXX'

For a non-tracked product, you should update inStock:

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curl 'https://www.wixapis.com/stores/v2/inventoryItems/product/{productId}' -X PATCH --data-binary '{"inventoryItem": {"trackQuantity": false,"variants": [{"variantId": "00000000-0000-0000-0000-000000000000","inStock": false}]}}' -H 'Content-Type: application/json' -H 'Authorization: XXX'

For tracked products, you should update quantity:

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curl 'https://www.wixapis.com/stores/v2/inventoryItems/product/{productId}' -X PATCH --data-binary '{"inventoryItem": {"trackQuantity": true,"variants": [{"variantId": "00000000-0000-0000-0000-000000000000","quantity": 4}]}}' -H 'Content-Type: application/json' -H 'Authorization: XXX'
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