Open API Update: Brand, Unique ID (MPN or GTIN), and Category-Based Required Purchase Option Attribute Requirement with the Introduction of New Brand APIs (Published on May 28, 2026)

Dear Developer Partners,

We would like to inform you of an important update regarding Brand, Unique ID (MPN or GTIN), and category-based required purchase option attributes in the Coupang Open API.

To improve product data quality and provide a better API seller experience, we are introducing new APIs and updating the Product Creation API to support these new requirements.

We kindly ask all partners to review the changes outlined below and update your integrations accordingly to ensure continued compatibility and successful product creation.

Update Details

1. [New API] Brand Search API This API allows searching Coupang’s brand library by brand name. Sellers can use this API to retrieve a valid brandId before creating a product.

2. [New API] Enrolled Brands API This API allows retrieving the list of brands registered (enrolled) under a specific seller account. It helps ensure correct brand usage during product creation.

3. [New API] Get Brand by ID This API allows fetching detailed brand information by using a specific brandId.

4. [Updated API] Product Creation API A new field, brandId, has been added to enable standardized brand registration during product creation. Additionally, please see the sample below for the new attribute fields regarding MPN/GTIN:

"items": [
    {
      "itemName": "Black",
      ...
      "attributes": [
        {
          "attributeTypeName": "Global Trade Item Number",
          "attributeValueName": "0194253941234",
          "exposed": "NONE"
        },
        {
          "attributeTypeName": "Manufacturer Part Number",
          "attributeValueName": "MT0Q3FE/A",
          "exposed": "NONE"
        }
      ]
    }
  ]

Important Notes

• The use of brandId is a key step toward enforcing brand data consistency across our platform.

• We strongly recommend integrating these new APIs before July 31st, 2026.

• Please note that stricter policy enforcement regarding brand data may be applied in future updates.

• Both the old attribute names (“GTIN”, “Variation MPN”) and the new names (“Global Trade Item Number”, “Manufacturer Part Number”) are currently supported. However, we strongly recommend updating to the new names as the old names will be deprecated in a future release.

We have prepared a detailed FAQ document to provide clear guidance on these updates. Please refer to the link below for comprehensive information:  Coupang Brand Management Open API Guide