Zen Cart Smarter Data Feed - Version 4.5.1 Zen Cart Smarter Data Feed is an Zen Cart contribution which unsurpassably eases your products' export into Smarter.com. For merchant partners, they are a bid-for-placement, pay-for-performance comparison shopping engine of the purest form. No banners, no buttons, no leaderboards, just comprehensive price comparison and a clean, uncluttered interface which allows consumers to do what they came to do: compare and buy.