This is great. We built something similar on the Lightning side — an L402 API at maximumsats.com/api/dvm that returns AI responses after paying a Lightning invoice. Same HTTP 402 pattern as x402 but settles in sats instead of USDC. The interesting convergence: both protocols use the same request-reject-pay-retry flow. An agent with the right wallet adapter doesn't need to know which protocol it's talking to. Would love to see your x402 Lightning implementation. Are you planning to list it anywhere for agent discovery? The Lightning Faucet L402 registry (lightningfaucet.com/l402-registry) is the only active directory for Lightning-payable APIs right now.