Know the human. Not just the customer.
A real, ID-verified person verifies once. You get a signed receipt anyone can check — offline, with no call to us.
- Verify once
- Prove everywhere
- No orb
AI-generated imageMost web traffic isn’t a person.
Your systems still assume a person on the other end. Signups, reviews, ad views and fraud models all lean on that guess.
Imperva Bad Bot Report, 2025
Standards assume a human. Few issue one.
Web Bot Auth, Know Your Agent and the Trusted Agent Protocol all reference a verified human. KYH is that proof.
Agents act for us
World shipped AgentKit to tie an agent to a person. The market agrees a real human must stand behind the agent.
Money moved on-chain
The GENIUS Act framed payment stablecoins. Value can now reach an agent in seconds.
The gap is the human
Faster rails with no human layer just move fraud faster.
KYC asks who. KYH asks if.
KYH complements KYC. Many flows want both: KYC for the legal identity, KYH for the living person.
| Compared on | KYC — Know Your Customer | KYH — Know Your Human |
|---|---|---|
| Question answered | Who is this legal identity? | Is this a real, ID-verified, live human? |
| Reusable across sites | No — repeated per institution | Yes — verify once |
| Re-verify | Re-scan, re-upload | A credential check |
| Privacy | Exposes identity documents | Sites see a signed result — never your documents or face |
| Works for AI agents | Not designed for it | Binds human, agent and payment |
| Independently verifiable | Trust the vendor | Public JWKS — anyone can check |
Verify once, prove everywhere.
Verify once
ID + liveness with Stripe Identity or Didit. 5arz never receives the images.
Hold the credential
A signed ES256 credential, optionally bound to an agent and a payment.
Present it anywhere
Show it to any site, rail or agent. No re-scan, no re-upload.
Checked locally
They validate it against our public JWKS with any JWT library.
One credential, many channels.
Agentic commerce
A real, accountable person behind the agent making the purchase.
Agentic commerce →AI training data
Signed proof a real person produced each label or rating.
Proof of work →Content authenticity
A verified-human mark for reviews, posts and creative work.
Verified Human →Trust and safety
Verified, live people for marketplaces, dating and social — without doxxing anyone.
Proof of personhood →Verified-human ads
Count real people, not bots, behind an impression.
Verified human traffic →DeFi / RWA
Bind a credential to a wallet and read isVerifiedHuman(wallet) on Base Sepolia. Mainnet after an audit.
Binds to stablecoin and card payments by reference — USDC and Stripe today; designed for Mastercard Agent Pay and Open USD (OUSD).
An open standard, not a walled garden.
- A standard ES256 JWT — no SDK, no account
- A published spec: ES256 / JWKS plus a W3C VC profile
- Rotating keys, checked offline
# fetch the public keys once GET https://api.5arz.com/.well-known/jwks.json # then verify locally, with any JWT library verify(credential, jwks) // ES256
Know Your Human, answered
What is Know Your Human (KYH)?
Reusable proof that a real, ID-verified, live person is behind an action. Verify once and hold a signed credential any site, rail or agent can check.
How is KYH different from KYC?
KYC answers “who are you”, per institution, for compliance. KYH answers “are you a real person at all”, and sites see a signed result instead of your documents.
Does KYH work for AI agents?
Yes. An agent can present proof that a verified, live person is behind it, bound with the agent and the payment in one signed credential.
What makes it reusable?
You hold a portable credential. Presenting it later is a signature check against our public JWKS — no repeat scan or upload.
Is my biometric data stored?
Not by 5arz. Your ID and selfie are checked inside our partner’s flow (Didit or Stripe Identity). 5arz gets a yes-or-no result, and we don’t sell personal data. Read the biometric policy.
Don’t trust us. Check.
Start free with 1,000 seals a month. No card, no sales call.
2 patents pending (US provisional).