Product Advertising API
Developer Guide (API Version 2013-08-01)

Common Request Parameters

The following table describes the request parameters that all Product Advertising API operations can use.


An alphanumeric token that uniquely identifies an Associate. This token is the means by which Amazon identifies the Associate to credit for a sale. If a request is made without identifying an Associate, Associate fees are not paid by Amazon. If the AssociateTag is included in the CartCreate request, the value for AssociateTag is automatically included in the PurchaseURL, which is returned by CartCreate. To obtain an Associate Tag, go to For more information, see Associate Tag.

Valid values: An alphanumeric token distributed by Amazon that uniquely identifies an Associate. Use this value in all requests to receive credit for the customer's purchase.

AWSAccessKeyId An alphanumeric token that uniquely identifies a seller. For information about getting an AWS access key ID, see Becoming an Associate.

Valid value: Access Key ID distributed by Amazon.

ContentType Specifies the format of the content in the response. For example, to transform your Product Advertising API response into HTML, set ContentType to text/html.

Valid values: text/html, text/xml

MarketplaceDomain Directs a request for products and offers to the marketplace domain that you specify. A marketplace domain is a website that is powered by and that supports the Amazon Associates program. For more information, see MarketplaceDomain Parameter. No
MerchantId An optional parameter that can be used to filter search results and offer listings to include only items sold by Amazon. By default, the API returns items sold by various merchants including Amazon. If the value “Amazon” is supplied, only items sold by Amazon are included in the response.

Valid values: Amazon

Operation Specifies the Product Advertising API operation to execute. For more information, see Operations.

Valid values: An Product Advertising API operation, for example, ItemLookup

Service Specifies the Product Advertising API service. There is only one value for all Product Advertising API operations.

Valid value: AWSECommerceService

Validate Prevents an operation from executing. Set the Validate parameter to True to test your request without actually executing it. When present, Validate must equal True; the default value is False. If a request is not actually executed (Validate=True), only a subset of the errors for a request may be returned because some errors (for example, no_exact_matches) are only generated during the execution of a request.

Default: False

Valid values: True, False

Version The version of the Product Advertising API software and WSDL to use. By default, the 2011-08-01 version is used. Alternately, specify a software version, such as 2013-08-01. For a list of valid version numbers, refer to the Product Advertising API Release Notes. Note that the latest version of Product Advertising API is not used by default.

Default: 2011-08-01

Valid values: Valid WSDL version date, for example, 2013-08-01.

XMLEscaping Specifies whether responses are XML-encoded in a single pass or a double pass. By default, XMLEscaping is Single, and Product Advertising API responses are encoded only once in XML. For example, if the response data includes an ampersand character (&), the character is returned in its regular XML encoding (&). If XMLEscaping is Double, the same ampersand character is XML-encoded twice (&). The Double value for XMLEscaping is useful in some clients, such as PHP, that do not decode text within XML elements.

Default: Single

Valid values: Single, Double



The AssociateTag parameter is a required parameter in Product Advertising API requests. When you register as an Amazon Associate, an Associate tag is sent to you by return email. An Associate tag, also known as an Associate ID, is an automatically generated unique identifier that you will need to make requests through the Product Advertising API. 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.

Once a cart is associated with an Associate Tag, you must use it in every other cart operation related to that shopping cart. Otherwise, you will receive an error.

If you do not include an Associate Tag in the CartCreate request, your request will fail.

AssociateTag is locale-specific, that is, for each locale in which you want to earn Associate revenue, you must get an Associate Tag. If you try to use a US-locale Associate Tag, for example, in the JP locale, you will not earn Associate revenue.

Be careful when specifying an AssociateTag because errors are not returned for incorrect values.