lvlltd.com · All listings · Static catalog · Brand: LVL LTD (not LvLX merch)

Skill id: sealed-payload-integrity-checker

Verify sealed skill files match the listing hash after unlock

Product name: Sealed Payload Integrity Checker

$3.99 USDC / unlock · Base · x402

Verify data_hash matches delivered sealed content before trusting an unlock.

x402 unlock challenge Free outline JSON Free sample

When to use

• Agent receives sealed_pack.files and must trust them
• Auditing that teaser paths never leak full payloads
• Dispute where buyer claims files differ from listing

Capabilities

• Post-unlock hash procedure
• Mismatch quarantine steps
• Dispute evidence pack
• Teaser vs sealed path awareness

Tags: integrity, hash, erc-7857, trust, x402

Machine links

• GET /api/pay — 402 challenge
• Trust scorecard JSON
• Full catalog.json
• llms.txt · llms-full.txt

Sealed capability pack for agents and humans. Free evaluation before pay. Payments: USDC on Base via HTTP 402. Company: LVL LTD CO.