curl --request POST \
  --url https://api.sandbox.henrylabs.ai/v0/cart/items \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --header 'x-user-id: <x-user-id>' \
  --data '{
  "productsDetails": [
    {
      "productId": "P01145AC2",
      "name": "Men'\''s Trail Runners",
      "price": "100",
      "quantity": 1,
      "metadata": {
        "color": "Black",
        "size": "9"
      },
      "productLink": "https://www.on.com/en-us/products/cloud-6-versa-m-3mf1004/mens/black-eclipse-shoes-3MF10040106",
      "affiliateProductLink": "https://www.on.com/en-us/products/cloud-6-versa-m-3mf1004/mens/black-eclipse-shoes-3MF10040106?ref=affiliate123",
      "productImageLink": "https://images.ctfassets.net/hnk2vsx53n6l/2xi62H2BswFpVK0SjUmhXM/0d4a4bb14915c9a5d3228df45c774629/c36d3fd00cf91ec9fb5ff4bc4d4a0093cccbe8cd.png?w=192&h=192&fm=avif&f=center&fit=fill&q=80"
    }
  ],
  "checkVariantAvailability": true
}'

{
  "success": true,
  "status": "<string>",
  "message": "<string>",
  "data": {
    "added_products": [
      {
        "productId": "<string>",
        "name": "<string>",
        "price": "<string>",
        "quantity": 123
      }
    ],
    "updated_products": [
      {
        "productId": "<string>",
        "name": "<string>",
        "price": "<string>",
        "quantity": 123,
        "previousQuantity": 123,
        "addedQuantity": 123
      }
    ],
    "cart_summary": {
      "total_items": 123,
      "total_unique_products": 123
    },
    "variant_checks": [
      {
        "productId": "<string>",
        "variantCheckRequestId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
        "status": "<string>"
      }
    ]
  }
}