1 hour cache without mention of when it was captured, otherwise you must mention time of capture, and date if it was not within 24hours.
(o) You will include a date/time stamp adjacent to your display of pricing or availability information on your application if you obtain Product Advertising Content from a Data Feed, or if you call the Product Advertising API or refresh the Product Advertising Content displayed on your application less frequently than hourly. However, during the same day on which you requested and refreshed the pricing and availability information displayed on your application, you may omit the date portion of the stamp. Examples of acceptable messaging include:
Amazon.com Price: $32.77 (as of 01/07/2008 14:11 PST - Details) Amazon.com Price: $32.77 (as of 14:11 PST - More info)
Additionally, you must either include the following disclaimer adjacent to the pricing or availability information or provide it via a hyperlink, popup box, scripted popup, or other similar method: "Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [amazon.com or endless.com, as applicable] at the time of purchase will apply to the purchase of this product." In the above examples, "Details" and "More info" would provide a method for the end user to read the disclaimer.
(p) You will not exceed, or if you build and release an application that calls the Product Advertising API, each copy of that application that is installed by an end user will not exceed, 1 call per second or send files to or from the Product Advertising API that are greater than 40K without our prior written approval