If you just want to display the items on a list, you can use the URL returned. If, however, instead of just displaying the list, you want to return the list item's ASINs and ListItemIds, which you need to add the list items to a remote shopping cart, you must use the list ID in a ListLookup request. ListSearch can only use a few response groups, which means that the information returned about the items on the list is minimal. ListLookup, on the other hand, can use many response groups, which means that you can return a great deal of information about the items on a list.

The following URL is a sample ListLookup request.

http://ecs.amazonaws.com/onca/xml?
Service=AWSECommerceService&
AWSAccessKeyId=[Access Key ID]
Operation=ListLookup&
ListType=WishList&
ListId=BB4444444477

Notice that the ListLookup request requires a ListType as well as a ListId because ListId are not unique across all lists.

The following XML shows a snippet of the response.

<ListItem>
  <ListItemId>98989898989898</ListItemId>
  <DateAdded>2002-01-27</DateAdded>
  <QuantityDesired>1</QuantityDesired>
  <QuantityReceived>0</QuantityReceived>
  <Item>
   <ASIN>0865874069</ASIN>
   <ItemAttributes>
     <Title>Confined Space Entry : Complying with the Standard</Title>
   </ItemAttributes>
  </Item>
</ListItem>

Notice that the response includes the ListItemId element. To add a list item to a remote shopping cart, you must include in the <parameter>CartCreate</parameter> or <parameter>CartAdd</parameter> request the item's ASIN and ListItemId. For more information, see Modifying the Items in a Remote Shopping Cart.

This response includes only one item attribute, the title of the item. By specifying more response groups in the request, you can return more information about the items on a list.