Step 4. Create the personalization option

Let's add a text box to the product page that allows the customer to add his name (up to 15 characters) to the back of the shirt.

The product_sku is the sku of the configurable product. The sku specified in the payload is a string that is appended to the product_sku when a customer selects to purchase this item. Likewise, the price supplied in the payload is added to the configurable product price.

Endpoint:

POST <host>/rest/default/async/bulk/V1/products/options

Payload:

[{
  "option": {
    "product_sku": "MS-Champ",
    "title": "Add Your Name (Max 15 Characters)",
    "type": "field",
    "sort_order": 1,
    "is_require": false,
    "price": 10,
    "price_type": "fixed",
    "sku": "Personalized",
    "max_characters": 15
  }
}]

Response:

{
   "bulk_uuid": "53ef1382-904a-4ba0-bb72-ebc5edd47da5",
   "request_items": [
       {
           "id": 0,
           "data_hash": "73170608b04187fe5939ece183711eff1bf9c4f4e30fc334db2affed1055c3f1",
           "status": "accepted"
       }
   ],
   "errors": false
}

Verify this step

Log in to the Luma website and select Catalog > Products. Click on the Champ Tee configurable product and expand the Customizable Options section.
On the Luma storefront page, search for Champ. Then click on the Champ Tee product.