<iframe src="http://www.amazon.com/reviews/iframe?akid=[AWS Access Key ID]&as
in=0316067938&exp=2010-09-02T17%3A54%3A07Z&linkCode=xm2&summary=0&tag=ws&trun
cate=256&v=2&sig=[Signature]" />
Important
Each iframe URL is valid for 24 hours. If the iframe URL expires, you will receive a
403
Forbidden
error code.
Suggesting Similar Items to Buy
Topics
•
Finding Similar Item IDs (p. 112)
•
Returning Items Similar to Cart Items (p. 113)
•
Using SimilarityLookup (p. 114)
•
Filtering Similar Items (p. 116)
•
Similar Versions of the Same Item (p. 116)
•
Related Items (p. 117)
When a customer purchases or searches for an item, they demonstrate an interest. As a developer, you
can capitalize on that fact by suggesting to the customer similar items they might also like to buy. Add-on
purchases is a powerful means of quickly increasing sales.
Similarity is based on items that customers bought, that is, customers who bought X also bought Y. This
algorithm is different from one based on items viewed, for example. Basing the algorithm on purchases
rather than viewing assures you that the similar items are more likely to be of interest to the customer.
Product Advertising API provides the following means of returning a list of similar items:
• Similarities response group
• CartSimilarities response group
• SimilarityLookup operation
Typically, the
Similarities
response group is used to find item IDs that are similar to the items returned
in a response. To return extended information about those items, you could use the similar item IDs in
ItemLookup
requests.
Alternately, if you know the ID of the item for which you want similar items, you can use the
SimilarityLookup
operation to return extended information about each similar item.
Finding Similar Item IDs
The
Similarities
response group returns the title and ID of items that are similar to those returned in
a response. For example, in the following sample request.
http://webservices.amazon.com/onca/xml?
Service=AWSECommerceService&
AWSAccessKeyId=
[AWS Access Key ID]
&
Operation=ItemLookup&
ItemId= B000184IY0&
ResponseGroup=Similarities
API Version 2011-08-01
112
Product Advertising API Developer Guide
Suggesting Similar Items to Buy