Payments verify the agent. Who verifies the human?
Each agent-payment protocol checks the agent and the mandate. 5arz adds the missing claim: a verified, live person is behind it.
- Rail-neutral
- ES256 · public JWKS
- Never in the payment path
Every rail leaves out the human.
5arz issues all three as signed ES256 credentials anyone checks against a public JWKS.
The principal
Is a real, ID-verified person behind this agent’s authority?
The delegation
Did that person grant this specific, scoped, revocable authority?
The fulfillment
When an agent pays for human work, did a real person deliver it?
What each rail checks — and what we add.
| Rail | What it verifies today | What 5arz adds |
|---|---|---|
| x402 (Coinbase) | Payment settles machine to machine in USDC | 402-native checkout for verified human work (developer preview, testnet) and on-chain isVerifiedHuman(wallet) on Base Sepolia |
| Google AP2 | Intent and Cart Mandates as W3C VCs | A companion credential: the signing principal is a verified, live person |
| Mastercard Agent Pay | Agentic Token binds card, agent and consent policy | The human behind the token, a scoped delegation proof, and proof of fulfillment |
| Visa TAP | Signed headers attest agent identity and intent | A human-principal claim that rides alongside TAP headers (RFC 9421) |
5arz is not affiliated with or endorsed by these networks. They are referenced as the open standards we build to.
A compact, signed JWT.
- Minted only after ID + liveness by Stripe Identity or Didit
- Claims like human, sybil_checked, liveness, wallet, task_type
- Checked offline against one public key — no call to us
- Readable on-chain on Base Sepolia (testnet)
No raw biometrics, ever. Price a task with the VHH Index, a USD reference rate for a verified human hour.
- MCP at mcp.5arz.com — 9 tools
- OpenAPI at /openapi.json
- Free sandbox: register with {"mode":"test"}
You proved the payment. We prove the human.
Register in two fields. The Free plan gives you 1,000 seals a month, no card.
x402 checkout is a developer preview on Base Sepolia (testnet); mainnet after an audit. 2 patents pending (US provisional).