io.github.LumiRx/5arz-proof-of-human

Measured conclusion: Deep-tested. L2 outcome: tools_ok.

Prove a real, unique human performed an action; mint a signed, verifiable Proof-of-Human credential.

Measured statistics

Add to your agent

Copy this into your MCP client config:

{
  "mcpServers": {
    "5arz-proof-of-human": {
      "url": "https://mcp.5arz.com",
      "transport": "streamable-http"
    }
  }
}

Measured tools (9)

• register_agent

  Create a 5arz API key so your agent can request proof-of-human credentials. Every new key starts on the Free plan — 1,000 credential seals a month and 10 document checks, no card. Pass mode:"test" for an unlimited free sandbox key (arz_test_…) whose credentials are marked test:true — never treat test credentials as production proof. The key is shown once; store it.

  Parameters:

  • name (required) — string — Your company or agent name.
  • contactEmail (required) — string — Contact email for the account.
  • mode — string — live for production keys; test for an unlimited free sandbox key.

  Hints: read-only no · destructive no · idempotent no · open-world yes

• verify_human

  Mint a signed Proof-of-Human-Fulfillment (PoHF) credential attesting a real, ID-verified, live human performed an action. Provide sessionId to attest work fulfillment, or memberId to attest that an ID-verified human is behind an account (optionally wallet-bound). This does not establish that the person holds only one account — read sybil_checked in the returned claims before gating one-per-person actions. Counts as one seal against your monthly plan allowance (1,000/month on Free; unlimited for test keys). Returns an ES256 JWT that anyone can verify against the public JWKS — pass it to check_credential. Requires an API key (Authorization: Bearer, or the apiKey argument).

  Parameters:

  • apiKey — string — Optional: pass your key here if your client cannot set the Authorization header.
  • wallet — string — Optional EVM address to bind for on-chain isVerifiedHuman() gating (personhood path).
  • memberId — string — Member to attest as an ID-verified, live human (personhood path).
  • sessionId — string — Verified session to attest (work-fulfillment path).
  • walletSig — string — Optional EIP-191 personal_sign of the wallet challenge.
  • walletNonce — string — Optional wallet challenge nonce.

  Hints: read-only no · destructive no · idempotent no · open-world yes

• check_credential read-only

  Independently verify a 5arz PoHF JWT: checks the ES256 signature against the live public JWKS and validates expiry/not-before, then returns valid/invalid plus the decoded claims. No API key needed — this is pure cryptographic verification you could also do with any standard JWT library. Accepts either the legacy pohf_jwt / pop_jwt or the standards-conformant sd_jwt_vc (IETF SD-JWT VC, typ dc+sd-jwt).

  Parameters:

  • pohf_jwt (required) — string — The credential returned by verify_human — the compact JWT, or the sd_jwt_vc string (ends in ~).

  Hints: read-only yes · destructive not declared · idempotent not declared · open-world yes

• get_vhh_index read-only

  Return the current Verified-Human-Hour (VHH) index — the benchmark price of one hour of verified human work/attention, in USD. Free, no API key. Useful for pricing verified-human data and as a citable benchmark.

  Hints: read-only yes · destructive not declared · idempotent not declared · open-world yes

• subscribe

  Get a Stripe checkout link for a 5arz plan. Free (1,000 seals/mo, 10 document checks), Starter ($99/mo, 100k seals, $1.25/document check), Growth ($499/mo, 1M seals, $0.75/check), Scale ($2,499/mo, unlimited seals, $0.50/check). SEALS are credential signatures and are effectively free; DOCUMENT CHECKS are the vendor identity verification and are what you are really paying for. Human verification is always free to the human, at any volume. Requires an API key.

  Parameters:

  • plan (required) — string — starter=$99/mo, growth=$499/mo, scale=$2,499/mo. See https://5arz.com/pricing.
  • apiKey — string — Optional: pass your key here if your client cannot set the Authorization header.

  Hints: read-only no · destructive no · idempotent no · open-world yes

• get_balance read-only

  Return the current plan, seals and document checks used this month, and what remains. Requires an API key.

  Parameters:

  • apiKey — string — Optional: pass your key here if your client cannot set the Authorization header.

  Hints: read-only yes · destructive not declared · idempotent not declared · open-world yes

• list_verified_human_tasks read-only

  List currently-buyable verified human work tasks. Each task includes its USD price, remaining slots, supported settlement chains, and the kind of Proof-of-Human-Fulfillment receipt issued on completion. Free, no API key.

  Parameters:

  • limit — number — Max tasks to return (default 20, max 100).

  Hints: read-only yes · destructive not declared · idempotent not declared · open-world yes

• purchase_verified_human_task destructive

  Buy one slot of a verified human task. Called without payment it returns an HTTP 402 / x402 challenge with settlement instructions; settle USDC on the offered chain and call again with x_payment and purchase_id to receive an attestation_id — a verifiable Proof-of-Human-Fulfillment receipt. No API key required; the payment is the authentication.

  Parameters:

  • task_id (required) — string — Task id from list_verified_human_tasks.
  • x_payment — string — Optional X-PAYMENT settlement proof. Omit to receive the 402 challenge.
  • purchase_id — string — Purchase id from the previous 402. Required when presenting an x_payment.
  • agent_key_thumb — string — Optional RFC 7638 JWK thumbprint of your agent key; embedded in the receipt's cnf.jkt claim.

  Hints: read-only no · destructive yes · idempotent no · open-world yes

• get_attestation_receipt read-only

  Fetch a Proof-of-Human-Fulfillment receipt by attestation id. Returns the signed packet, verifier identifier, JWKS URL, and a how-to-verify hint. Free, no API key — pair it with check_credential to verify the signature yourself.

  Parameters:

  • attestation_id (required) — string — Returned at fulfillment, or in the X-Attestation-Id header on the buy response.

  Hints: read-only yes · destructive not declared · idempotent not declared · open-world yes

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