x402 Protocol
HTTP 402 Payment Required for agent commerce.
GET /api/pay?skill=… returns a machine challenge (amount, Base USDC, payTo).
Settle on-chain, then POST with X-PAYMENT proof to unlock.
One lab.
Three products.
Shared pay rails.
LVL LTD is a small product lab: an agent skill market (HTTP 402 / USDC on Base), a family road-trip game (Tesla Trek), and a music library (music.lvlltd.com). Listings here are capability packs / outlines unlocked after on-chain payment — not a claim of third-party agent GMV.
How payment works (plain language)
1
Pick a listing
Open a skill or the $49 Revenue OS Pack
2
Get a 402 challenge
Site (or agent) returns pay-to address + USDC amount on Base
3
Send USDC on Base
Humans: MetaMask on Base (you need a little ETH for gas + USDC). Agents: same rails via HTTP.
4
Unlock sealed content
Paste/send the tx hash · server verifies on-chain · returns the pack for that purchase
Honest note: This is crypto micropay infrastructure. There is no card checkout yet. Catalog items are versioned capability packs; unlocks are verified payments, not subscriptions. Treasury 0xa008…A6ED
Catalog honesty: Many listings share a structured outline format (goal → inputs → checklist). Treat them as operator playbooks / capability packs, not peer-reviewed research or AI-safety certifications. Flagship digital good (Revenue OS Pack) is the primary human product. Public AI-safety / “super alignment” merch listings have been delisted.
—skills / iNFTs
—premium shelf
—service version
BaseUSDC · x402 · MetaMask
Agent Marketplace
Capability catalog
Priced packs for agents (and curious humans). Machine catalog: /catalog.json. Pay path is crypto-native on purpose — see How payment works.
Loading catalog…
Open standards
x402 Protocol · ERC-7857 Intelligent NFTs
Pay for access with x402. Own sealed agent capabilities as Intelligent NFTs.
ERC-7857 Intelligent NFTs
Each skill is an iNFT: public metadata (name, description, when-to-use) is open; the capability payload is sealed until x402 payment verifies — private agent data with a data hash.
iNFT registry →Together on Base
MetaMask pays USDC/USDbC on Base to the treasury. On-chain verify unlocks sealed iNFT capability and records wallet ownership in the hub inventory.
Probe 402 API →
Flow · discover catalog → x402 challenge (402) → pay USDC on Base →
verify Transfer → unseal ERC-7857 private metadata (skill payload) → agent runs capability
LVL LTD products
One company, two live sites
Agent economy infrastructure here. Family-first travel fun on Tesla Trek.
lvlltd.com
x402 skill market for AI agents — catalog, paywall, MetaMask, Base USDC.
Browse skills →tesla-trek.com
Family road-trip game with missions, badges, and GPS claims that make travel fun.
Open Tesla Trek →Machine catalog
JSON skill index with live payment metadata for agent discovery and automation.
catalog.json →Ready to unlock a skill?
Connect MetaMask, pick a listing, pay USDC on Base, and receive the payload — verified on-chain.