Amazon Product Advertising API Developer's Manual page 383

Product Advertising API Developer Guide
SearchIndex: KindleStore
Value
relevancerank
price
-price
reviewrank
daterank
salesrank
SearchIndex: Kitchen
Value
salesrank
reviewrank
price
-price
daterank
titlerank
-titlerank
SearchIndex: Jewelry
Value
salesrank
relevancerank
price
-price
reviewrank
Sort Values for UK
Description
Items ranked according to the following criteria: how often the keyword
appears in the description, where the keyword appears (for example,
the ranking is higher when keywords are found in titles), how closely
they occur in descriptions (if there are multiple keywords), and how
often customers purchased the products they found using the
keyword.
Price: low to high
Price: high to low
Average customer review: high to low
Publication date: newer to older
Bestselling
Description
Bestselling
Average customer review: high to low
Price: low to high
Price: high to low
Publication date: older to newer
Alphabetical: A to Z
Alphabetical: Z to A
Description
Bestselling
Items ranked according to the following criteria: how often the keyword
appears in the description, where the keyword appears, for example,
the ranking is higher when keywords are found in titles, and, if there
are multiple keywords, how closely they occur in descriptions, and,
finally, how often customers purchased the products they found using
the keyword.
Price: low to high
Price: high to low
Highest to lowest ratings in customer reviews.
API Version 2011-08-01
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