Join Walmart Today to Get Free DeliveryDid you know that Walmart basically has its own Amazon Prime-esque membership plan? It'll give you free grocery delivery, free shipping with no order minimum, savings on fuel, and early access to promotions and events. Plus, you can try Walmart+ free for 30 days to see if the service is right for you or your family. What Is OnePay Walmart Spend Card? The OnePay Walmart Spend Card is a Walmart-exclusive credit card (meaning that it can only be used at Walmart and Walmart.com).