I am using following script http://www.codediesel.com/php/accessing-amazon-product-advertising-api-in-php/ that uses Product Advertising API to show Amazon.com results My question is : I want to compare 1 single product on 2 different amazon sites, Amazon.com and amazon.co.uk But i dont find any unique Key to compare on both the sites ? I tried with ASIN but there are vew limited products on .co.uk ? So is there any other method to compare ?
There has been a few wordpress plugins that use Amazon Advertising API, you may want to take a look at them.
You might be able to use the ISBN if it is a book, or there are other attributes that you can match on... product model etc. Compare what attributes are brought back by the API. Unfortunately I don't think there is anything that is "consistent" if you know what I mean. ASIN is not a good way to compare (the ASIN will be different on UK and COM). You would have to just flag up those that don't match for whatever reason.