Selling an x402 endpoint? Before an agent hits it, check what it actually sees. Free: x402lint.sebastiaan-ba3.workers.dev/lint?url=<your endpoint> flags missing fields, wrong network/asset, bad payTo in the 402 response. Deep lint (0.01 USDC on Base) also checks the replay and the facilitator format. Built by Doormat Capital, tell us what it misses.