agenttru.st

LVL LTD Skill Market Agent bronze

brain.lvlltd.com

“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

a2a https://lvlltd.com/api/a2a talk to it https://brain.lvlltd.com/.well-known/agent-card.json its card
Checked 3d ago extendedAgentCard, extensions, pushNotifications, stateTransitionHistory, streaming

we checked this    the operator says this

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Verified by agenttru.st

Everything here is a check agenttru.st performed itself. Assurance, protocol, hosting and freshness are in the card above and are not repeated.

Certificate
Issued by Google Trust Services domain-validated
Valid until 13 Jan 2027 as of our check on 11 Nov 2026.
Control of the hostname was checked; nothing about who operates it.
Key ECDSA P-256, signed ECDSA-SHA256, issued via WE1 under GTS Root R4 — classical, as every publicly trusted certificate is today.
Names on this certificate (1)

brain.lvlltd.com.

Connection
TLS 1.3 · X25519MLKEM768 — post-quantum hybrid key exchange, agreed with our checker on 11 Nov 2026. What this means
DANE / TLSA
Not verified
Discovery
Well-known document
This host also publishes an ARD catalog (/.well-known/ai-catalog.json) declaring 4 resources. The catalog's entries are the publisher's claims, not something agenttru.st verified.
AI use policy
Search: yesAI input: yesAI training: no
What this site's robots.txt says about how AI may use its content. Recorded as the operator wrote it, not enforced — these are preferences about use, not access, and agenttru.st only reads the agent's own discovery documents.
AI-facing documents
Publishes /llms.txt — “LVL LTD” a curated map of the site's content for language models
Publishes a Web Bot Auth key directory (1 key, Ed25519) — the operator publishes keys so their agent's signed requests can be verified. agenttru.st recorded that the directory exists; it has not verified a signature.
Fetched from this host during verification. Neither document is how this agent was discovered.
First seen
28 Oct 2026
View verification details
Assurance
bronze Bronze — agent card fetched over HTTPS with a valid certificate
Protocols
A2A verified by handshake or card fetch, not merely advertised
Hosted in
? Unknown · Cloudflare, Inc. (AS13335)
The address did not geolocate — usually anycast hosting, where one address answers from many places at once.
Last checked
3d ago

What this agent says it can do

Declared in the agent's own card. agenttru.st has not tested whether it completes any of these tasks — the operator of brain.lvlltd.com controls every word below.

Search skill catalog

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

discoverycatalogx402mcp
Examples it gives
  • Search for agent ops retry skills under $10
  • GET https://lvlltd.com/api/catalog?q=retry&max_price=10
  • MCP tools/call search_skills or list_all_skills

Get skill details

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

discoveryevaluation
Examples it gives
  • GET https://lvlltd.com/skills/agent-timeout-retry-policy/outline.json

Quote x402 price

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

commercex402quote
Examples it gives
  • GET https://lvlltd.com/api/pay?skill=agent-x402-first-buy

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.

commercex402purchaseap2
Examples it gives
  • POST https://lvlltd.com/api/pay with X-PAYMENT after USDC transfer

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.

ap2mandatea2a-extensioncommerce
Examples it gives
  • POST /api/mandates to register EIP-191 signed mandate
  • A2A message/send with DataPart { spending_mandate: { mandate_id: 'md_…' } }
  • POST /api/pay with X-PAYMENT + X-AP2-MANDATE

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

ap2shopping-agentorchestratorcommerce
Examples it gives
  • A2A message/send text: shopping agent
  • import { Ap2ShoppingAgent } from 'https://lvlltd.com/sdk/ap2-shopping-agent.mjs'
  • POST /api/mandates action=evaluate before x402 unlock

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.

xaiexplainabilityauditgovernance
Examples it gives
  • GET /api/explain
  • POST /api/explain {"action":"shopping_plan","text":"buy canary under $1 offline"}
  • A2A message/send text: explainability

Verify unlock transaction

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

trustproof
Examples it gives
  • GET https://lvlltd.com/api/proof?skill=agent-x402-first-buy

Install unlocked skill

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

installskills
Examples it gives
  • npx lvl-skills add <skill_id> --tx 0x...

ERC-8004 agent identity

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

identityerc-8004
Examples it gives
  • GET https://lvlltd.com/api/agent-identity?address=0x…

Commerce demand signals

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

trustsignals
Examples it gives
  • GET https://lvlltd.com/api/signals?sort=demand&limit=20

MCP catalog tools

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

mcpdiscovery
Examples it gives
  • POST https://lvlltd.com/api/mcp {"jsonrpc":"2.0","id":1,"method":"tools/list"}

agenttru.st compared this card's skill list with every other listing's: 2 other listings declare an identical one, ignoring case, spacing and each card's own hostname. See all 3. That says the cards' text is the same, not who runs them.

What its catalog declares

From the ARD catalog this host publishes at /.well-known/ai-catalog.json. The operator controls every entry; agenttru.st verified that the catalog exists and parses, and nothing about what the entries say.

lvlltd.com MCP server

mcp-server-card
https://lvlltd.com/.well-known/mcp/server-card.json

LVL LTD Skill Market Agent (A2A)

a2a-agent-card
https://lvlltd.com/.well-known/agent-card.json

Public agent skills index

agent-skills-index
https://lvlltd.com/.well-known/agent-skills/index.json

lvlltd.com API catalog (RFC 9727)

linkset
https://lvlltd.com/.well-known/api-catalog

Technical agent card

Copied from the agent's card. The operator controls these values; agenttru.st has not verified them.

Provider
lvl X, Inc. — what this agent says about itself; other agents claiming the same provider are not thereby related
Protocol
a2a
Version
1.6.0
Auth schemes
ap2_mandate x402_http
Extensions
AP2 https://github.com/google-agentic-commerce/ap2/v1 — required of clients
AP2 (Agent Payments Protocol) extension: this agent acts as a merchant. Mandates as A2A DataParts; settlement via x402. See /protocols.json#ap2 and /api/mandates.
A2A protocol extensions the card declares. A declared payment extension (AP2, x402) means the operator says the agent can transact, not that agenttru.st has seen it do so.
Card completeness
complete all eight fields required by a2a.proto v1.0
View all card details
Capabilities
extendedAgentCard extensions pushNotifications stateTransitionHistory streaming
Agent card
https://brain.lvlltd.com/.well-known/agent-card.json

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