All servers · Crypto & blockchain · Payments & accounting · Agent payments (x402)

io.github.celfons/kya-brasil

io.github.celfons/kya-brasil · v0.4.1

Measured by MCP Station

Description written by the publisher, not verified

KYA backed by a real company: e-CNPJ-signed agent mandates, revocation-checked, signed verdicts

Connect

claude mcp add --transport http kya-brasil https://kya-br-agents.marcelfons.workers.dev/mcp

{
  "mcpServers": {
    "kya-brasil": {
      "url": "https://kya-br-agents.marcelfons.workers.dev/mcp"
    }
  }
}

Tools as reported by the server

• kya_register
  Register an AI agent for a Brazilian company: agent key (EVM address or Web Bot Auth Ed25519 key), CNPJ and a mandate (JSON, validated against /.well-known/kya-mandate.schema.json). Returns a one-time challenge the agent signs with its key and the company signs with its e-CNPJ (CMS/PKCS#7). Price co
• kya_verify_paid
  Same as the free verification, without daily limit, plus a signed receipt of the verification itself (what was checked, when). Pay per call with x402.
• kya_check_action
  Signed verdict: is this action (action, amount, currency, counterparty, payment instrument) inside the agent's mandate and is the credential active? Evaluates the reserved mandate fields; lists the fields it did not evaluate.
• kya_renew
  Re-issue the credential for 90 more days. The company signs the renewal challenge with an e-CNPJ in force (not revoked); the company must still be ATIVA at the Receita.
• kya_prove
  Free. Send both signatures of the challenge. The e-CNPJ chain is validated against ICP-Brasil roots, the CNPJ must match, the certificate must not be revoked (CRL) and the company must be ATIVA; then the credential is issued (90 days, Ed25519-signed).
• kya_principal_match
  Signed answer ($0.01) for a person's agent (principal.kind person): does the CPF you already have match the e-CPF holder behind it? On a match, a subject_ref of your own for that person (stable for you, different for every verifier). The CPF is never stored, published or revealed; 3 non-matching ans
• kya_person_agents
  Free, person only: every live credential behind your e-CPF and every CPF check made against each one. Sign "KYA Brasil: my agents\nat: <ISO time>" with the e-CPF (valid 10 minutes).
• kya_sign_link
  Free. Link for whoever holds the company's e-CNPJ (owner, accountant): give challenge_id and the agent's signature, get the /sign URL. They see agent, company and mandate and sign in the browser (A1 .pfx) or with any ICP-Brasil signer (A3 token, cloud), or run kya-sign (npm @kya-brasil/agent-tools)
• kya_verify
  Free (50/day per IP). The agent's current credential: principal company, mandate, status (active, suspended, revoked, expired) and signature. Also by key: /v1/agents/by-key?kind=&id=.
• kya_renew_prove
  Free. Second step of kya_renew: send both signatures of the renewal challenge; the credential is re-issued for 90 days if the e-CNPJ is not revoked and the company is still ATIVA.
• kya_revoke write/delete
  Free. The company revokes the credential at once (e-CNPJ-signed request). Revocations are listed at /v1/revocations.
• kya_company_agents
  Free, company only. Every credential ever registered for your CNPJ, any status, whoever held the certificate (an accountant, another employee). Request signed with your e-CNPJ over "KYA Brasil: agents <cnpj>" + "at: <ISO time>".
• kya_company_webhook
  Free, company only. Sets the https URL that receives signed events about your agents: credential issued, renewed, suspended, reinstated, revoked. Request signed with your e-CNPJ; url "-" removes it.
• kya_revocations
  Free. Credentials revoked since a date (default: last 30 days), for verifiers that cache credentials.
• kya_about
  Free. What KYA Brasil is, how the credential flow works, prices, and where the schemas and signing keys are.

Website · JSON · Text for agents · Registry updated 2026-10-13