# Check if a URL is list-worthy

SKU: List Check
Price: $0.02 (live SKUS)
Path: GET /api/v1/listcheck

listcheck never invents listed=true. payment_ready is not listed.

No free sample sibling on this SKU. Unpaid GET of the paid path returns HTTP 402.

Unpaid GET of the paid path returns HTTP 402 PAYMENT-REQUIRED. Settle USDC on Base, then retry with PAYMENT-SIGNATURE.

payment_ready means the unpaid 402 handshake works on a live catalog door (ping-verify / well-known). It is not listed=true.
verified_settle means a paid settle was proven (settleproof). This catalog never invents settleproof.
listed=true is never invented.

HTML: https://openclawproductions.com/use-cases/check-list-worthy
Markdown: https://openclawproductions.com/use-cases/check-list-worthy.md
Doors: https://openclawproductions.com/api/v1/doors