Amazon Product Advertising API Developer's Manual page 193

Product Advertising API Developer Guide
Request Parameters
Name
Action
AssociateTag
CartId
CartItemId
CartModify
Description
The Action parameter is a child element of the Item
parameter in both SOAP requests. Use the Action
parameter to change cart items to move items to the
Saved-For-Later area, or change Saved-For-Later
(SaveForLater) items to the active cart area (MoveToCart).
Type: String
Default: None
Valid Values: MoveToCart | SaveForLater
Specifies the Associate who is making the request. An
Associate tag, also known as an Associate ID, is an
automatically generated unique identifier. When you log
in to the Amazon Associates website for your locale, the
page that you are directed to includes a message that says
"Signed in as" followed by your Associate tag.
The Associate tag that you used to create a cart must also
be used on all other operations associated with the same
cart.
Type: String
Default: None
Valid Value: The same Associate tag that was used in the
related CartCreate request.
Constraint:
Alphanumeric token returned by
identifies a cart.
Type: String
Default: None
Valid Values: Value returned by
Specifies an item to be modified in the cart where N is a
positive integer between 1 and 10, inclusive. Up to ten
items can be modified at a time. CartItemId is neither
an ASIN nor an OfferListingId. It is, instead, an
alphanumeric token returned by
CartAdd . This parameter is used in conjunction with
Item.N.Quantity to modify the number of items in a
cart. See Item, that follows, for more information.
Type: String
Default: None
Valid Values: Value returned by
CartAdd .
API Version 2011-08-01
186
CartCreate (p. 175) that
CartCreate (p. 175).
CartCreate (p. 175) and
CartCreate (p. 175) or
Required
No
Yes
Yes
Yes