SellerMagnet API for Amazon Listing Hijacker Detection

Detecting Amazon Listing Hijackers with SellerMagnet’s Offer Data

By Sarah Davis | July 13, 2025

Detecting Amazon Listing Hijackers with SellerMagnet’s Offer Data

Amazon marketplace success hinges on vigilance. Listing hijacking, where unauthorized sellers offer products under your listings, can severely impact your sales, brand reputation, and customer trust. Fortunately, with SellerMagnet’s robust Amazon data API, you can proactively identify and address potential hijackers.

Understanding the Threat of Amazon Listing Hijacking

Listing hijacking takes various forms, including:

  • Counterfeit Products: Unauthorized sellers offering fake or low-quality versions of your products.
  • Used Products Sold as New: Sellers misrepresenting the condition of their offerings.
  • Unauthorized Bundling: Sellers creating unauthorized product bundles using your listings.
  • Price Gouging: Hijackers inflating prices, damaging your brand's perception of value.

Early detection is crucial to mitigate these risks. SellerMagnet’s Amazon Product Offers API provides the real-time data needed to identify suspicious activity.

How SellerMagnet Helps Detect Listing Hijackers

SellerMagnet's Amazon Product Offers API empowers you to monitor your listings and identify potential hijackers through several key data points.

1. Monitoring Seller IDs

Regularly compare the list of sellers offering your products against your authorized seller list. Any unfamiliar sellerId indicates a potential hijacker. Use the Amazon Product Offers endpoint to retrieve a list of all sellers for a specific ASIN:


curl --location --request GET 'https://sellermagnet-api.com/amazon-product-offers?asin=B08N5WRWNW&marketplaceId=ATVPDKIKX0DER&api_key=YOUR_API_KEY'

Examine the offers array in the JSON response to extract seller IDs. For example:


{
  "data": {
    "asin": "B08N5WRWNW",
    "offers": [
      {
        "sellerId": "A123BC456DEF78",
        "sellerName": "Authorized Seller 1",
        "condition": "New",
        "totalPrice": 25.99
      },
      {
        "sellerId": "A987ZY654XWV32",
        "sellerName": "Unauthorized Seller",
        "condition": "New",
        "totalPrice": 24.99
      }
    ]
  },
  "success": true
}

If "Unauthorized Seller" isn't on your list, investigate further.

2. Price Monitoring

Significant price deviations from your established pricing strategy can be a sign of hijacking. Hijackers often undercut prices to quickly gain sales, potentially offering inferior or counterfeit products. Monitor the totalPrice within the offers array. Set up alerts for listings that fall below a specified price threshold. By checking Amazon Product Statistics you can check history trends of the product and price variations. Here is an example:


curl --location --request GET 'https://sellermagnet-api.com/amazon-product-statistics?asin=B08N5WRWNW&marketplaceId=ATVPDKIKX0DER&api_key=YOUR_API_KEY'

{
  "success": true,
  "data": {
    "asin": "B08N5WRWNW",
    "buyBoxPrice": 2599,
    "buyBoxSellerIdHistory": [
      [
        "2024-01-01T00:00:00Z",
        "A123BC456DEF78"
      ],
      [
        "2024-01-02T00:00:00Z",
        "A987ZY654XWV32"
      ]
    ],
    "salesRankHistory": [
      [
        "2024-01-01T00:00:00Z",
        100
      ],
      [
        "2024-01-02T00:00:00Z",
        150
      ]
    ]
  }
}

3. Condition Analysis

Ensure that all sellers accurately represent the condition of your products. If you only sell new items, any listings with

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