business.br-cnpj

Brazilian company registry lookup by CNPJ (the 14-digit national company tax ID). Returns the legal name (razão social), trade name, registration status and reason, start date, legal nature, company size, share capital (BRL), primary economic activity (CNAE code + description), contact email/phone, full address, and the partners/officers (QSA — name + role). Free, open Brazilian government data (Receita Federal via BrasilAPI). The canonical "who is this Brazilian company" lookup for KYB, diligence, and cross-border onboarding — complements business.lei (GLEIF) and business.sos-search (US).

price

$0.0011 USDC per call

method

GET/api/business/br-cnpj

payment

x402 v2 · USDC on Base (EIP-3009) or Solana (SPL transfer)

auth

None. Sign the payment, retry with PAYMENT-SIGNATURE.

tier

Tier 0 — no paid upstream

Parameters

Name	Type	Description
`cnpj`required	string	14-digit CNPJ. min 14 chars · max 20 chars

Code samples

cURLbash

# 1. Probe with no auth → 402 envelope with PaymentRequirements
curl -sS 'https://2s.io/api/business/br-cnpj?cnpj=xxxxxxxxxxxxxx'

# 2. Sign + retry with PAYMENT-SIGNATURE:
curl -sS 'https://2s.io/api/business/br-cnpj?cnpj=xxxxxxxxxxxxxx' \
  -H 'PAYMENT-SIGNATURE: <base64-json-payload>'

# Or use the canonical runner (handles probe → sign → retry):
#   EVM_PRIVATE_KEY=0x... node --env-file=.env.local \
#     --experimental-strip-types scripts/x402-pay.ts \
#     'https://2s.io/api/business/br-cnpj?cnpj=xxxxxxxxxxxxxx'

TypeScript / Node — @2sio/sdktypescript

import { TwoS } from '@2sio/sdk'

const client = new TwoS({
  privateKey: process.env.EVM_PRIVATE_KEY as `0x${string}`,
})

const result = await client.business.brCnpj({
  "cnpj": "xxxxxxxxxxxxxx"
})

console.log('endpoint:', result.endpoint)
console.log('cost:', result.costUsd, 'USDC')
console.log('tx:', result.settlement?.txHash)
console.log('data:', result.data)

Python — 2siopython

import os
from twosio import TwoS

client = TwoS(private_key=os.environ["EVM_PRIVATE_KEY"])

result = client.business.br_cnpj(cnpj="xxxxxxxxxxxxxx")

print("endpoint:", result.endpoint)
print("cost:", result.cost_usd, "USDC")
print("tx:", (result.settlement or {}).get("tx_hash"))
print("data:", result.data)

MCP — Claude Desktop / AgentKit / any MCP hostjson

// 1. Add @2sio/mcp to your MCP host config (Claude Desktop example below).
//    EVM_PRIVATE_KEY funds x402 payments per call.

// claude_desktop_config.json
{
  "mcpServers": {
    "2sio": {
      "command": "npx",
      "args": ["-y", "@2sio/mcp"],
      "env": { "EVM_PRIVATE_KEY": "0x..." }
    }
  }
}

// 2. Once the server is running, agents call this tool via standard MCP:

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "business.br-cnpj",
    "arguments": {
      "cnpj": "xxxxxxxxxxxxxx"
    }
  }
}

Response

Field	Type	Description
`ok`	boolean	one of: true
`items`	array
`total`	integer	Total matching rows upstream; null when unknown.
`source`	object

Example response datajson

{
  "ok": true,
  "items": [
    {
      "cnpj": "example",
      "legalName": "example",
      "tradeName": "example",
      "status": "example",
      "statusReason": "example",
      "startDate": "example",
      "legalNature": "example",
      "size": "example",
      "shareCapitalBRL": 1,
      "primaryActivityCode": "example",
      "primaryActivity": "example",
      "email": "example",
      "phone": "example",
      "address": {
        "street": "example",
        "number": "example",
        "district": "example",
        "city": "example",
        "state": "example",
        "zip": "example"
      },
      "partners": [
        {
          "name": "example",
          "role": "example"
        }
      ]
    }
  ],
  "total": 1,
  "source": {
    "provider": "example",
    "url": "example",
    "license": "example"
  }
}

Discovery

/api/directory — full catalog of every endpoint
/openapi.json — OpenAPI 3.1 spec (per-op x-payment-info, x402Payment security)
/.well-known/x402 — machine-readable service descriptor for x402-aware crawlers
/.well-known/mcp/server-card.json — MCP SEP-1649 server card
/llms.txt — plain-text manifest for LLM ingestion

2s.io is x402-native. Every call is paid per-request from a USDC-funded EVM wallet on Base — no signup, no API keys, no monthly fees. Source code: github.com/2s-io/sdk.