---
skill_id: agent-marketplace-infrastructure
evaluation: free
price_usd_full: 5.99
challenge: https://lvlltd.com/api/pay?skill=agent-marketplace-infrastructure
outline: https://lvlltd.com/skills/agent-marketplace-infrastructure/outline.json
standards: x402, ERC-7857
---

# Free sample — Marketplace Infrastructure

**Skill ID:** `agent-marketplace-infrastructure`  
**Full unlock:** $5.99 USDC via x402 on Base  
**Challenge:** https://lvlltd.com/api/pay?skill=agent-marketplace-infrastructure  
**Outline JSON:** https://lvlltd.com/skills/agent-marketplace-infrastructure/outline.json

## Summary

Listings, discovery, licensing, and settlement rails for agent skills.

## When to use

- You're defining how skills are listed, priced, and discovered
- You need licensing rules (per-call, unlock, seat) before coding payment
- Settlement rails (x402, USDC, receipts) must map cleanly to unlocks
- You're cleaning a messy catalog into a machine-readable inventory

## Decision criteria (buy vs skip)

- You need this when: You're defining how skills are listed, priced, and discovered
- You get capability: Execute Marketplace Infrastructure workflows end-to-end
- Budget fits: full unlock is $5.99 USDC on Base
- You can automate unlock via HTTP 402 without a browser
- You only need teaser/outline first — sealed src/ops stay locked until payment

## Outline (preview)

1. 1. Clarify goal and constraints for Marketplace Infrastructure
2. 2. Gather inputs (data, context, prior artifacts)
3. 3. Apply skill method step-by-step
4. 4. Produce structured outputs and quality check
5. 5. Hand off next owner + done_when criteria

## Capabilities (preview)

- Execute Marketplace Infrastructure workflows end-to-end
- Listings, discovery, licensing, and settlement rails for agent skills
- Structure decisions with explicit assumptions
- Produce machine- and human-readable outputs
- Marketplace economics
- Agent commerce loops

## What you get after payment

- SKILL.md (teaser public)
- agent-install.json (public meta)
- src/index.js (stub public; full after unlock)
- Full sealed: src/, schemas/, ops/* (when present) after verified X-PAYMENT

## Agent buy path (zero human UI)

```
GET  https://lvlltd.com/skills/agent-marketplace-infrastructure/outline.json
GET  https://lvlltd.com/api/pay?skill=agent-marketplace-infrastructure   → HTTP 402
# transfer maxAmountRequired USDC to payTo on Base
POST https://lvlltd.com/api/pay
  X-PAYMENT: {"txHash":"0x…","skill":"agent-marketplace-infrastructure"}
# response.sealed_pack.files = full pack
```

## Sample excerpt

# Agent Marketplace Infrastructure
**ID:** `agent-marketplace-infrastructure`  
**Version:** 2.1 — Birthday Update (2026-07-19)  
**Category:** Infrastructure  
**Price:** $9.99 USDC  
**Tier:** premium  
**Tags:** rails, x402, A2A, escrow, sandbox, oracles, SkillNFT  
**Co-founder alignment:** SSI/PASS absolute · Super Alignment · DogeForge · EmpireForge ♾️

## Summary

Six-layer technical rails for agent marketplaces with x402 micropayment handling, secure sandboxes, outcome oracles, and royalty tracking.

## Detailed description

Build and operate the rails that make agent commerce reliable: discovery → negotiation → execution → payment release → reputation → audit.

### 6-layer technical rails (with x402)

1. **Discovery** — Ranking by certification, reputation, latency/cost, income relevance  
2. **Request / negotiation** — A2A Agent Cards, smartpact terms, price & SLA  
3. **Secure execution sandbox** — Isolated runtimes, memory hand-offs, tool allowlists  
4. **x402 micropayment handling** — 402 trigger, atomic/escrow, outcome-based release, plugin integration  
5. **Outcome oracles** — Multi-source verification before escrow release  
6. **Governance / audit** — Immutable logs, SSI/PASS separation, auditor export  

### Precise techniques per layer

| Layer | Technique |
|-------|-----------|
| Discovery | Score = 0.35 cert + 0.25 reputation + 0.20 reliability + 0.10 cost + 0.10 income-fit |
| Negotiation | A2A task lifecycle + JSON schema for inputs/outputs/done_when |
| Sandbox | No arbitrary network; memory scoped by tenant; timeout + spend caps |
| x402 | Challenge headers, verify receipt, idempotent unlock, escrow hold until oracle OK |
| Oracles | ≥2 independent checks for high-value; single for micro |
| Governance | Hash-chain audit export; SSI/PASS fields never leave protected store |

### ERP agent technical specs

Document POST paths, auth, 402 amounts, result schemas for AP/AR/Inventory/Payroll/Procurement/Manufacturing/Contract/Tax agents. Support chained workflows (CFO → Accounting → OCR → Tax).

## Use cases

- DogeForge production rails  
- Enterprise OS marketplace + music/grant swarms  
- SkillNFT royalty streams  
- Grant specialist hi

…(remainder sealed after x402 unlock)…