Buy Box

The offer on an Amazon product page that the Add to Cart button buys: one seller's price, chosen by Amazon among all offers.

Definition

What Buy Box means

Many sellers can offer the same product, but the product page shows one offer with the Add to Cart and Buy Now buttons. That offer is the Buy Box. Amazon picks it among eligible offers using price, delivery speed, and seller performance, and most sales go through it.

The winner can change during the day, and it depends on where the shopper is: delivery location changes shipping speed, and with it which offer wins. A price tracker that records only the page price is recording the Buy Box price, which can belong to a different seller from one check to the next.

Clair's product endpoint returns the Buy Box offer as price, sold_by, and ships_from for the delivery location you pass as zip_code. The offers endpoint returns every other seller's price for the same ASIN.

In the data

How it appears in a response

GET /v1/product?engine=amazon&asin=B0CF3VGQFL · product.sold_by

{
  "id": "A3ODNP7R491D62",
  "name": "Redragon Official"
}

The Buy Box seller for B0CF3VGQFL, delivering to New York 10001. From a recorded Amazon Products API response.

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Glossary