lvlltd.com · Marketplace · All listings · First unlock
Coding
Skill id: gf-q-pay-js-invariants
· Standard
Invariants for challenge skill match and sealed delivery — pay.js Invariant Checklist
Product name: pay.js Invariant Checklist
$4.59 USDC / unlock · Base · x402
1 · FreeOutline + sample before pay
2 · Price$4.59 one-time USDC unlock
3 · BuyVerify on Base → sealed pack forever
Invariants for challenge skill match and sealed delivery.
Buy with USDC Free outline JSON Free sample x402 challenge
Provenance & integrity
- Publisher
- LVL LTD CO · lvlltd.com
- Payment
- USDC on Base (eip155:8453) via HTTP 402 · sealed pack after verified tx
- Content class
capability_pack_outline- Sealed data_hash
0x04d9e1103436769423e449abf16c83aac3e241cfe9af9394fa34686b44ae0f63- iNFT token_id
14244619244406169457- Trust scorecard
- /api/trust?skill=gf-q-pay-js-invariants
- Signed provenance
- https://lvlltd.com/provenance/gf-q-pay-js-invariants.json
- Proof of sales
- /api/proof (confirmed unlocks only — never estimated)
When to use
- You need pay.js Invariant Checklist as a concrete operator pack
- Catalog expansion in Coding for agent buyers
- Preparing ship evidence without inventing revenue claims
What you get
- pay.js Invariant Checklist workflow
- Decision-grade outline and free sample
- Named artifact outputs after unlock
- x402 Base USDC pay path ready
Tags: coding, service, continuous, x402, quality-factory, decision-grade, functional, sealed-runtime, gf-complete, depth:standard
Buyer reviews
Wallet-attested only — no seed ratings. API: /api/reviews?skill=gf-q-pay-js-invariants
Loading reviews…
Machine links
- GET /api/pay — 402 challenge
- Trust scorecard JSON
- Related skills JSON
- Reviews JSON
- Free outline.json · sample.md
- 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.