x402-sushi.up.railway.app is a lightweight market-data and swap-quoting API focused on the Base network. It provides single-token and chain-wide price lookups (/price, /prices) plus an aggregated swap quote endpoint (/quote) to help find best execution paths. The service is low-cost ($0.001–$0.01 per call) and is designed for quick integration into trading tools, dashboards, and DeFi apps.