Best of all, Product Advertising API is free. By signing up to become a Product Advertising API developer, you join the tens of thousands of developers who are already realizing financial gains by creating Product Advertising API-driven applications and web stores.
How Product Advertising API works
Your application uses the Product Advertising API to display item descriptions, images, and reviews to your customers.
Customers shop and add items to their shopping cart.
When the customer is ready to purchase the items, your application sends an HTML form to Product Advertising API and Amazon completes the purchase by getting purchase information, such as payment method and shipping address. Amazon then fulfills the order by shipping the items.