# Penny Machine CSV preflight

Status: one-payment public pilot; first valid buyer; retry identical request if pending
OpenAPI: https://eloquent-brioche-25bbc9.netlify.app/openapi.json
POST /v1/catalog/audit: JSON csv string, max 100 rows. Proposed price US$0.01 exact native USDC on Base.
When enabled, runtime 402 is authoritative. Retry identical proof/body on 202; never pay again for a pending order. Product data only.