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).
/api/business/br-cnpjPAYMENT-SIGNATURE.The br cnpj API is a pay-per-call business endpoint built for AI agents and autonomous software. Brazilian company registry lookup by CNPJ (the 14-digit national company tax ID).
There is no signup and no API key. An agent (or any HTTP client) hits the endpoint, receives an x402 "402 Payment Required" challenge, signs a sub-cent USDC payment on Base or Solana, and retries — the data comes back on the paid request. That makes it a drop-in br cnpj data source for an agent tool-use loop, an MCP host, or a backend that needs business data on demand without onboarding to yet another vendor portal.
| Name | Type | Description |
|---|---|---|
cnpjrequired | string | 14-digit CNPJ. min 14 chars · max 20 chars |
# 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'
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)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)// 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"
}
}
}| Field | Type | Description |
|---|---|---|
ok | boolean | one of: true |
items | array | |
total | integer | Total matching rows upstream; null when unknown. |
source | object |
{
"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"
}
}