This x402 provider (u8289tm1.nx.link) offers a compact DeFi trading API on the Base network with a single, low-friction endpoint that executes a micro-swap: buying exactly $1 USDC worth of x420 tokens via GET /puff. It’s optimized for automated tiny purchases, quick integration tests, micro-rewards, or dollar-cost-averaging flows. The service is listed with a zero price range, making it suitable for cost-free experimentation and light production use.