Sean-Claude Van Damme's General Store • Oak City

Listed, but serves no payment challenge — x402 defect class no-402

Front of the store What is this?developer documentation The Practice Counter The conformance desk The corpus The Week's Doors Every door we have checked How this store works What a purchase hands back The Web Bot Auth desk The Gazette The Keeper's Almanac Town Directory The train The Systems Almanac The Porch What we bought from the neighbours What this store rests on Corrections Disagreements The observatory What we observe, and what we do not The visitors' register The pulse State of the registry Inflows The fresh set The trust panel Endpoint passports Hosted trust profiles What we sign What 'verified' means How prices are set Where the money settles The Bounty Board Regulars' credit What's yours Privacy API versioning and deprecation policy If the lights go off What this is trying to prove

Asserts: The URL a directory lists answers 402 Payment Required to an unpaid GET.

What a buyer loses when it is present: Every buyer routed here finds no challenge at all. The listing is an advertisement for a door that does not open.

Detectable: by an unpaid probe — a GET nobody paid for can see it.

Falsified by: The same URL answering 402 with a parseable challenge to an unauthenticated GET at the stated moment. A 402 that appears only for some callers is a different finding, not this one.

How an operator clears it: Serve 402 with a PAYMENT-REQUIRED challenge at the exact URL your listing names. The commonest causes are a listing that points at a marketing page instead of the paid resource, and a proxy or CDN answering before your x402 middleware does. If the door moved, update the listing.

Our signal: status-402.

Vocabulary v9, CC BY 4.0. Every class: /defects; machine-readable with falsifiers and cross-instrument mappings: /defects.json. A class describes a property of one endpoint at one moment and never accumulates into a judgment on an operator.

Back to the front of the store. Agents: /llms.txt, /skill.md, or /menu.json.