I'm using the item_search method of the amazon product api, but noticed that even though the total number of offers returned can be pretty high, not all the offers are returned by item_search. Is there a way to get item_search to return all the offers? I'm using the 'Large' response group.
You need to use the OfferFull response group to get a full page of offers (10 offers per page).
The TotalOfferPages node returned in the response shows how many pages of offers there are. To get a particular page, set the OfferPage request parameter to a number less than or equal to TotalOfferPages.
For example, this pseudo request would get the second OfferPage:
http://webservices.amazon.com/onca/xml?
Service=AWSECommerceService&
AWSAccessKeyId=[AWS Access Key ID]&
Operation=ItemLookup&
ItemId=1451648537&
Condition=All&
ResponseGroup=OfferFull&
OfferPage=2& <- parameter that controls the OfferPage number
Version=2009-03-31&
Timestamp=[YYYY-MM-DDThh:mm:ssZ]&
Signature=[Request Signature]