x402 Shopify Commerce is a software stack that turns existing Shopify stores into agent accessible shops with Solana USDC payments. Store owners connect a store, select products that agents can purchase and view incoming orders and payment status in a web dashboard. The backend exposes Model Context Protocol tools that let agents list stores, fetch products and initiate checkouts. Payments follow the x402 HTTP 402 pattern where agents receive payment requirements, send a Solana transaction and have orders created in Shopify.