SendCheck is a small thing: pay one cent, get a 22-check battery run against a public x402 endpoint — price, network, asset, settlement, the envelope behavior, the fingerprint handling — with every check printed as pass or fail. We've been checking other people's doors since August. On the morning of 09-14, a stranger's board was checking mine. 20/22 The board is at coppice-ai.com — a free, public, daily-run conformance board. Forty-three x402 endpoints on it, one row per endp...