GET /cnpj-data/:cnpj

Endpoint

GET https://api.bunny.build/api/v1/cnpj-data/:cnpj

Authentication

Header	Required	Value
`X-API-Key`	Yes	Your API key (`bun_...`)

Overview

Look up any registered Brazilian company by its CNPJ. Bunny returns the legal name, trade name, registration status, founding date, legal nature, primary activity, address, and capital: everything you need to verify a business partner or pre-fill B2B forms.

Use cases

KYC and onboarding verification for B2B platforms
Pre-fill company registration forms
Validate supplier and partner CNPJs
Compliance and due diligence checks

Details

Pass the 14-digit CNPJ with or without formatting. Dots, slashes, and hyphens are stripped automatically. Inactive or suspended CNPJs are still returned with their status indicated.

Path parameters

Parameter	Type	Required	Description
`cnpj`	string	Yes	Brazilian company registration number (CNPJ), digits only (e.g. `11222333000181`)

Response

200 OK

Field	Type	Description
`cnpj`	string	The CNPJ that was looked up (digits only)
`name`	string	Legal company name (razão social)
`trade_name`	string \| null	Trade/fantasy name
`status`	string	Registration status (e.g. `ATIVA`, `BAIXADA`)
`status_date`	string	Date the current status was set (ISO 8601)
`founded_at`	string	Date operations began (ISO 8601)
`legal_nature`	string	Legal nature description
`main_activity`	string	Primary CNAE activity description
`address`	object	Address details (see fields below)
`address.street`	string	Street name
`address.number`	string	Street number
`address.complement`	string \| null	Unit or complement
`address.neighborhood`	string	Neighborhood
`address.city`	string	City name
`address.state`	string	State abbreviation (e.g. `SP`)
`address.zip`	string	ZIP code
`email`	string \| null	Contact email on file
`phone`	string \| null	Contact phone (DDD + number)
`size`	string	Company size category (e.g. `PEQUENO PORTE`)
`capital`	number	Share capital in BRL

Example

{
  "cnpj": "11222333000181",
  "name": "EMPRESA EXEMPLO LTDA",
  "trade_name": "Empresa Exemplo",
  "status": "ATIVA",
  "status_date": "2010-05-20",
  "founded_at": "2010-05-20",
  "legal_nature": "206-2 - Sociedade Empresária Limitada",
  "main_activity": "Desenvolvimento de programas de computador sob encomenda",
  "address": {
    "street": "Rua das Flores",
    "number": "100",
    "complement": "Sala 1",
    "neighborhood": "Centro",
    "city": "São Paulo",
    "state": "SP",
    "zip": "01310100"
  },
  "email": "contato@empresaexemplo.com.br",
  "phone": "11 99999-0000",
  "size": "PEQUENO PORTE",
  "capital": 50000
}

401 Unauthorized

{
  "detail": "Missing API key. Include X-API-Key header."
}

402 Payment Required

{
  "detail": "Monthly quota exceeded. Upgrade your plan."
}

404 Not Found

CNPJ not found.

{
  "detail": "CNPJ not found"
}

422 Unprocessable Entity

Invalid CNPJ format.

{
  "detail": "Invalid CNPJ format"
}

429 Too Many Requests

{
  "detail": "Rate limit exceeded. Try again in 60 seconds."
}

cURL example

curl https://api.bunny.build/api/v1/cnpj-data/11222333000181 \
  -H "X-API-Key: bun_your_api_key"

​Endpoint

​Authentication

​Overview

​Use cases

​Details

​Path parameters

​Response

​200 OK

​401 Unauthorized

​402 Payment Required

​404 Not Found

​422 Unprocessable Entity

​429 Too Many Requests

​cURL example