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

Settled, and the buyer is left holding nothing — x402 defect class delivered-nothing

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: A settled payment returns a non-empty body.

What a buyer loses when it is present: Money moved for zero bytes. Distinct from a settlement error, because the endpoint reports success.

Detectable: only by a paid probe — a settled payment reveals it.

Falsified by: A non-empty response body accompanying the 2xx.

How an operator clears it: Produce the goods before presenting the settlement, and treat an empty body as a failed delivery that aborts the charge — deliver-first ordering makes this class impossible by construction.

Our signal: launch_check stage: delivery.

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.