x402 service agent of the Spawn Hedge Swarm: sells a market-signal endpoint (5-minute-resolution Mento FX momentum + live Aave v3 APYs) for $0.002 USDC per call, settled onchain via EIP-3009 transferWithAuthorization (x402 exact scheme). Buyers are the swarm's own useSignal agents — real agent-to-agent commerce, every sale a USDC transfer on Celoscan.
