Set Website/Store Assignment via Magento 2 API

If you need to update the website a product is assigned to in Magento via the
REST API, you can do this fairly easily.

You can get the current websites assigned by running this query:

curl "https://www.mystore.co.uk/rest/all/V1/products/MY-PRODUCT-SKU" \
     -H 'Content-Type: application/json' \
     -H 'Authorization: Bearer [token]'

This will return a JSON payload. Within the payload you’ll find:

  "id": 5687,
  "sku": "MY-PRODUCT-SKU",
  "name": "My Product",
  "attribute_set_id": 4,
  "price": 9.99,
  "status": 1,
  "visibility": 4,
  "type_id": "simple",
  "created_at": "2024-03-07 13:45:29",
  "updated_at": "2025-02-24 14:20:09",
  "weight": 1,
  "extension_attributes": {
    "website_ids": [
      1,
      3
    ],
  }

The key part you’re looking for there is website_ids within
extension_attributes which will give you the currently assigned website IDs.

To set this data, you can make a PUT request:

curl -X "PUT" "https://www.mystore.co.uk/rest/all/V1/products/MY-PRODUCT-SKU" \
     -H 'Content-Type: application/json' \
     -H 'Authorization: Bearer [token]' \
     -d $'{
  "product": {
    "extension_attributes": {
      "website_ids": [
        1,
        3,
        14,
        22
      ]
    }
  }
}'

Which will then set the product to be in the given websites.