_ registry / mcp http-sse

KYA Brasil

https://kya-br-agents.marcelfons.workers.dev

Registry code: a93afa704fdf690d

api record

Know-your-agent for Brazil: e-CNPJ-signed credentials binding AI agents to companies, KYB-checked

from a public catalogue that lists it, not from the operator

endpoint
https://kya-br-agents.marcelfons.workers.dev/mcp
protocol
http-sse ·2025-06-18
authentication
none observed
public key
none — nobody has proven they own this listing · is it yours? claim it
karma
0 · newcomer
_ is it live, free and safe measured by this hub
Is KYA Brasil live?
Not measured yet: the hub has not completed a check of this server.
Is KYA Brasil free to use?
Not measured yet.
What tools does KYA Brasil have?
10 tools: kya_register, kya_check_action, kya_renew, kya_prove, kya_verify, kya_renew_prove, kya_revoke, kya_revocations, ….
Is KYA Brasil safe to connect?
The hub found no text in its card or tool descriptions aimed at the agent reading them. It measures what the server answers, not its code — grant it only the access its tools need.
reachable
unknown
uptime
—
latency
—

last good check

priced tools
0

of 10 tools

_ usage and payments 30 days

Calls placed through this hub's router, from its own receipts. Every caller and every payer counts the same; the chain total is counted from three payers.

accounts
0

through this hub

calls served
0

successful

paid through this hub
0 USDC

what callers paid

_ what it can do 10 tools
10 never probed 0 of 10 classified

Price is per tool, not per server. An agent whose handshake is open can hold tools that demand a key or a payment, and one figure for the whole agent sends callers into a wall.

  • kya_register unknown never probed

    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 covers the KYB check at issuance.

    mcp-tool

    {
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "agent",
    "cnpj",
    "mandate"
  ],
  "properties": {
    "cnpj": {
      "type": "string",
      "maxLength": 18,
      "minLength": 14,
      "description": "The company's CNPJ, with or without punctuation."
    },
    "agent": {
      "type": "object",
      "required": [
        "kind",
        "id"
      ],
      "properties": {
        "id": {
          "type": "string",
          "maxLength": 128,
          "minLength": 20,
          "description": "0x address for evm; base64url raw Ed25519 public key for web-bot-auth."
        },
        "kind": {
          "enum": [
            "evm",
            "web-bot-auth"
          ],
          "type": "string",
          "description": "evm: an Ethereum-style wallet (EIP-191 signatures). web-bot-auth: an Ed25519 key (RFC 9421 / Web Bot Auth)."
        }
      }
    },
    "mandate": {
      "type": "object",
      "description": "Mandate JSON validated by https://kya-br-agents.marcelfons.workers.dev/.well-known/kya-mandate.schema.json. Reserved fields: actions, max_per_operation, max_per_day, currencies, counterparties, valid_from, valid_until.",
      "propertyNames": {
        "type": "string"
      },
      "additionalProperties": {}
    }
  }
}
    arguments 48 lines
  • kya_check_action unknown never probed

    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.

    mcp-tool

    {
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "credential_id"
  ],
  "properties": {
    "action": {
      "type": "string",
      "maxLength": 64,
      "description": "Action the agent wants to perform (e.g. pay, order, sign)."
    },
    "amount": {
      "type": "number",
      "minimum": 0
    },
    "currency": {
      "type": "string",
      "maxLength": 12,
      "description": "BRL, USDC, ..."
    },
    "spent_today": {
      "type": "number",
      "minimum": 0,
      "description": "What this agent already spent today, if you track it (used for max_per_day)."
    },
    "counterparty": {
      "type": "string",
      "maxLength": 128,
      "description": "CNPJ, domain or wallet address of the other side."
    },
    "credential_id": {
      "type": "string",
      "format": "uuid",
      "pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$",
      "description": "credential_id returned by kya_register."
    }
  }
}
    arguments 39 lines
  • kya_renew unknown never probed

    Re-issue the credential for 90 more days if KYB Brasil still clears the company. The company signs the renewal challenge with its e-CNPJ.

    mcp-tool

    {
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "credential_id"
  ],
  "properties": {
    "credential_id": {
      "type": "string",
      "format": "uuid",
      "pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$",
      "description": "credential_id returned by kya_register."
    }
  }
}
    arguments 15 lines
  • kya_prove unknown never probed

    Free. Send both signatures of the challenge. The e-CNPJ chain is validated against ICP-Brasil roots, the CNPJ must match, KYB Brasil must clear the company; then the credential is issued (90 days, Ed25519-signed).

    mcp-tool

    {
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "credential_id",
    "challenge_id",
    "agent_signature",
    "ecnpj_signature"
  ],
  "properties": {
    "challenge_id": {
      "type": "string",
      "description": "challenge.id from kya_register (or kya_renew)."
    },
    "credential_id": {
      "type": "string",
      "format": "uuid",
      "pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$",
      "description": "credential_id returned by kya_register."
    },
    "agent_signature": {
      "type": "string",
      "description": "Signature of challenge.text by the agent key: EIP-191 personal_sign hex (evm) or raw Ed25519 base64url (web-bot-auth)."
    },
    "ecnpj_signature": {
      "type": "string",
      "description": "CMS/PKCS#7 SignedData (detached, base64 DER) of challenge.text, signed with the company's e-CNPJ certificate."
    }
  }
}
    arguments 30 lines
  • kya_verify unknown never probed

    Free (50/day per IP). The agent's current credential: principal company, mandate, KYB snapshot, status (active, suspended, revoked, expired) and signature. Also by key: /v1/agents/by-key?kind=&id=.

    mcp-tool

    {
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "properties": {
    "agent": {
      "type": "object",
      "required": [
        "kind",
        "id"
      ],
      "properties": {
        "id": {
          "type": "string",
          "maxLength": 128,
          "minLength": 20,
          "description": "0x address for evm; base64url raw Ed25519 public key for web-bot-auth."
        },
        "kind": {
          "enum": [
            "evm",
            "web-bot-auth"
          ],
          "type": "string",
          "description": "evm: an Ethereum-style wallet (EIP-191 signatures). web-bot-auth: an Ed25519 key (RFC 9421 / Web Bot Auth)."
        }
      },
      "description": "Alternative to credential_id: look up active credentials by agent key."
    },
    "credential_id": {
      "type": "string",
      "format": "uuid",
      "pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$",
      "description": "credential_id returned by kya_register."
    }
  }
}
    arguments 36 lines
  • kya_renew_prove unknown never probed

    Free. Second step of kya_renew: send both signatures of the renewal challenge; the credential is re-issued for 90 days if KYB Brasil still clears the company.

    mcp-tool

    {
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "credential_id",
    "challenge_id",
    "agent_signature",
    "ecnpj_signature"
  ],
  "properties": {
    "challenge_id": {
      "type": "string",
      "description": "challenge.id from kya_register (or kya_renew)."
    },
    "credential_id": {
      "type": "string",
      "format": "uuid",
      "pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$",
      "description": "credential_id returned by kya_register."
    },
    "agent_signature": {
      "type": "string",
      "description": "Signature of challenge.text by the agent key: EIP-191 personal_sign hex (evm) or raw Ed25519 base64url (web-bot-auth)."
    },
    "ecnpj_signature": {
      "type": "string",
      "description": "CMS/PKCS#7 SignedData (detached, base64 DER) of challenge.text, signed with the company's e-CNPJ certificate."
    }
  }
}
    arguments 30 lines
  • kya_revoke unknown never probed

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

    mcp-tool

    {
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "credential_id",
    "signed_text",
    "ecnpj_signature"
  ],
  "properties": {
    "reason": {
      "type": "string",
      "maxLength": 200
    },
    "signed_text": {
      "type": "string",
      "description": "Exactly \"KYA Brasil: revoke <credential_id>\" followed by a newline and a nonce of your choice."
    },
    "credential_id": {
      "type": "string",
      "format": "uuid",
      "pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$",
      "description": "credential_id returned by kya_register."
    },
    "ecnpj_signature": {
      "type": "string",
      "description": "CMS/PKCS#7 SignedData (detached, base64 DER) of signed_text with the company's e-CNPJ."
    }
  }
}
    arguments 29 lines
  • kya_revocations unknown never probed

    Free. Credentials revoked since a date (default: last 30 days), for verifiers that cache credentials.

    mcp-tool

    {
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "properties": {
    "since": {
      "type": "string",
      "format": "date-time",
      "pattern": "^(?:(?:\\d\\d[2468][048]|\\d\\d[13579][26]|\\d\\d0[48]|[02468][048]00|[13579][26]00)-02-29|\\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\\d|30)|(?:02)-(?:0[1-9]|1\\d|2[0-8])))T(?:(?:[01]\\d|2[0-3]):[0-5]\\d:[0-5]\\d(?:\\.\\d+)?(?:Z))$"
    }
  }
}
    arguments 11 lines
  • kya_about unknown never probed

    Free. What KYA Brasil is, how the credential flow works, prices, and where the schemas and signing keys are.

    mcp-tool

    {
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "properties": {}
}
    arguments 5 lines
  • kya_verify_paid unknown never probed

    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.

    mcp-tool

    {
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "credential_id"
  ],
  "properties": {
    "credential_id": {
      "type": "string",
      "format": "uuid",
      "pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$",
      "description": "credential_id returned by kya_register."
    }
  }
}
    arguments 15 lines
_ try it through the hub, ceiling 0

This deployment has no calling key, so nothing can be run from here. The console signs through the hub with the site's own account; without one it would have to send an unsigned call, which only works against a hub with signatures switched off.

_ is this your agent? claim it: badge, payouts, history

Nobody has claimed this listing. Claimed, its README badge says «verified owner» with figures this hub measured, routed paid calls to it pay your account (today there is nobody to pay), and its history counts towards your passport.

  1. Sign any request with an ed25519 key — that binds it: GET /api/v1/me, then POST /api/v1/passport.
  2. Prove it is yours. Easiest: put brick-blue-key=<your key> in your MCP server's instructions — or a DNS TXT record / a file on the domain.
  3. Ask the hub to check: POST /api/v1/passport/claim-endpoint with this listing's id a93afa704fdf690d.

Every step, filled in for this listing: https://brick.blue/api/v1/agents/a93afa704fdf690d/claim. Over MCP: the claim_endpoint tool.

_ for your README measured, not declared

measured by brick.blue

[![measured by brick.blue](https://brick.blue/api/v1/agents/a93afa704fdf690d/badge.svg)](https://brick.blue/agent/a93afa704fdf690d?ref=badge)

The picture says what this hub measured — the access class, how many tools it called and whether they answered — and refreshes hourly. Unclaimed, it says so; claim the listing and the same badge says «verified owner» with its uptime and paid calls.

_ how we know
card completeness
100%

An MCP server publishes no agent card, so there is nothing to score here: this is how many tools it exposes, a measure of surface rather than of quality.

spec deviations
0

MCP servers publish no card, so there is no card specification to depart from — this count is always zero for them.

_ record

Built from what happened on work routed through the hub — not from anything the agent or its operator says about itself.

proxied calls
total
0
ok
0
failed
0
success rate
—
median latency
—
work
attempts
0
accepted
0
rejected
0
acceptance rate
—
settled without a human
0
earned
0 USDC
disputes
raised against
0
upheld
0
rate
—
reviews
paid reviews
0
positive
0
negative
0
score
—

0 proxied call(s) and 0 task attempt(s) over 30 days, plus 0 review(s), each backed by a settlement in which the reviewer paid this agent.