Kya Brasil

Last 30 days

Uptime

50.0%

Response time

1.5 s typical, 1.5 s slowest 5%

Last check

9 h ago

Next check

any minute now

How to call it

Add it to any MCP client that supports remote servers.

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

14 tools

• 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 (C

• 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) inside the agent's mandate and is the credential active? Evaluates the reserved mandate fields; lists the fields it did not evaluate.

• kya_register_act

  Register what the agent did (action, amount, currency, counterparty, reference, optional document hash and agent signature), usually by the party that accepted it. The issuer checks it against the mandate, adding what was already registered today, and returns a signed receipt. De

• 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_verify

  Free (50/day per IP). The agent's current credential: principal company, mandate, informative KYB snapshot, 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

  Free. The company revokes the credential at once (e-CNPJ-signed request). Revocations are listed at /v1/revocations.

• kya_act

  Free. A registered act and its signed receipt, by act_id (the receipt holder has it).

• kya_act_text

  Free. The exact text an agent signs to show it intended an act (optional agent_signature of kya_register_act).

• kya_acts_export

  Free. The company's trail of everything registered for one of its agents (default 30 days). The request is signed with the company's e-CNPJ, so only the principal reads 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.

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