br_cnpj_card

Brazilian CNPJ registration card

Company registration and status proof in Brazil's CNPJ (Federal Revenue): legal name, activity, address and status.

Category: Tax
Country: Brazil
Extracted fields: 10 fields
Cost: 1 credit

br_cnpj_cardspecimen

Cnpj
Company name
Trade name
Opening date
Legal nature
Main activity
Address
Postal code
Status

What it checks

National identifiers. Official checksum or format of the number (NIF, CPF, CURP, RUT, SSN…).br_cnpj, postal_code
Postal code. Postal code format of the country.
Recency. Issued less than N days ago.

Extracted fields

Cnpjcnpj
Company namecompany_name
Trade nametrade_name
Opening dateopening_date
Legal naturelegal_nature
Main activitymain_activity
Addressaddress
Postal codepostal_code
Statusstatus
Issue dateissue_date

Sample request

curl https://api.constaia.com/v1/analyze \
  -H "Authorization: Bearer $CONSTAIA_API_KEY" \
  -F "file=@document.pdf" \
  -F 'options={
    "expect": "br_cnpj_card",
    "checks": {
      "max_age_days": 90
    },
    "storage": "none"
  }'

Sample response

Fictitious data. Shortened response.

200 OK · application/json

{
  "id": "an_01J9Z3K8QW4T6Y2B7N5M1R0PXC",
  "object": "analysis",
  "status": "completed",
  "livemode": false,
  "document": {
    "type": "br_cnpj_card",
    "label": "Brazilian CNPJ registration card",
    "confidence": 0.97
  },
  "verdict": {
    "expected": [
      "br_cnpj_card"
    ],
    "match": true,
    "status": "valid",
    "reasons": [
      {
        "code": "type_match",
        "severity": "info",
        "message": "The document is: Brazilian CNPJ registration card."
      }
    ]
  },
  "fields": {
    "cnpj": {
      "value": "11.222.333/0001-81",
      "confidence": 0.99,
      "validated": true
    },
    "company_name": {
      "value": "ESPÉCIME COMÉRCIO LTDA",
      "confidence": 0.98,
      "validated": null
    },
    "trade_name": {
      "value": "ESPÉCIME",
      "confidence": 0.97,
      "validated": null
    },
    "opening_date": {
      "value": "2015-04-01",
      "confidence": 0.96,
      "validated": null
    },
    "legal_nature": {
      "value": "206-2 - Sociedade Empresária Limitada",
      "confidence": 0.99,
      "validated": null
    },
    "main_activity": {
      "value": "62.01-5-01 - Desenvolvimento de programas de computador sob encomenda",
      "confidence": 0.98,
      "validated": null
    },
    "address": {
      "value": "AV PAULISTA, 1000, BELA VISTA, SAO PAULO - SP",
      "confidence": 0.97,
      "validated": null
    },
    "postal_code": {
      "value": "01310-100",
      "confidence": 0.96,
      "validated": null
    },
    "status": {
      "value": "ATIVA",
      "confidence": 0.99,
      "validated": null
    },
    "issue_date": {
      "value": "2026-09-01",
      "confidence": 0.98,
      "validated": null
    }
  },
  "checks": [
    {
      "code": "id_number",
      "passed": true,
      "message": "id_number"
    }
  ],
  "warnings": [],
  "storage": {
    "mode": "none",
    "file_deleted_at": "2026-09-29T10:00:02Z",
    "expires_at": null
  },
  "usage": {
    "credits": 1,
    "pages": 1
  }
}

FAQ

Does Constaia prove the document is authentic?

No. It checks the type, data consistency and your rules, and flags signals such as a possible edit or a screen photo. That does not prove authenticity.

Is a copy of the document kept?

No, unless you ask for it. With storage "none" (the default) the file is deleted when the analysis ends.

And for the record…

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