ItemLookup using Amazon Product API

Question

How can I look up one specific item. I'm not trying to lookup the product using the ASIN, I want to the exact product using the OfferListingId

The API keeps returning the error:

 [Message] => 9FKKDHB9XOBXVQWPMCJQF%2F6AF69WZCTZ76LD6TX2JWIW1QHSOW0XZWOSZ3HX%2B1GVPWXW%2FNKWAQWHRIZKG34SW3AXSZMUDGA%2FMT0WLVCKXJDORBPI0%2FMDSW%3D%3D is not a valid value for ItemId. Please change this value and retry your request.

This is the ID returned by a search I performed via the API.

I have the IDType set like this:

"IdType" => "ASIN",

The docs state:

Default: ASIN

Valid Values: SKU | UPC | EAN | ISBN

So, am I to believe that I can't do an itemLookup using their own internally assigned OfferListingId?

Answer 1

No, you cannot look for an item based on an OfferListingId. The OfferListingId is a unique id akin to a price tag. For instance, if you sell three of the same shirt, you will have three different OfferListingId (see Checking for an Offer Listing ID).

Amazon does not offer the ability to search by OfferListingId. Your best bet is to use the itemLookup operation with the Offers response, then iterate through the OfferListings until you find the OfferListingId you are interested in.