Ecato provides price comparison services for ecommerce websites. In your site's product listing Ecato will list (and match your site's formatting) the prices of the same product for various other website's that sell the product with price and shipping included in the estimation. Visitors to your website are now afforded the opportunity to see the prices being offered over the Internet for your product catalog.
The Ecato API uses a simple REST interface with GET calls and JSON and XML data formats. You can return lists of: categories, reviews and product details (top product, prices, rating, user votes). The API is available to all Ecato users regardless of pricing tier.