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Norway MVA-nummer Validation API

Validate Norway MVA-nummer numbers via REST API. Backed by Brønnøysund Register (real-time) — returns registration status, company name, and address in a single call.

Quick start

curl -H "Authorization: Bearer YOUR_API_KEY" \
  http://localhost:3000/api/v1/validate/NO/NO123456789MVA

Single validation

Validate one Norway MVA-nummer number. Returns full company details for valid numbers.

const res = await fetch(
  'http://localhost:3000/api/v1/validate/NO/NO123456789MVA',
  { headers: { 'Authorization': 'Bearer YOUR_API_KEY' } }
);
const data = await res.json();
/*
{
  "valid": true,
  "status": "active",
  "company_name": "Example GmbH",
  "address": "Musterstraße 1, Norway",
  "country_code": "NO",
  "vat_number": "NO123456789MVA",
  "cached": false,
  "request_id": "req_01abc..."
}
*/

Response format

{
  "valid": true,
  "status": "active",
  "company_name": "Example Norway Ltd",
  "address": "Musterstraße 1, Norway",
  "country_code": "NO",
  "vat_number": "NO123456789MVA",
  "cached": false,
  "request_id": "req_01abc..."
}

Batch validation

Validate up to 25 numbers in a single POST request. Numbers are processed in parallel — ideal for onboarding flows and nightly reconciliation.

curl -s -X POST http://localhost:3000/api/v1/validate \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "numbers": [
      { "country": "NO", "vat": "NO123456789MVA" },
      { "country": "NO", "vat": "NO123456789MV9" }
    ]
  }'

[
  {
    "vat": "NO123456789MVA",
    "valid": true,
    "status": "active",
    "company_name": "Example Ltd",
    "country_code": "NO",
    "cached": false
  },
  {
    "vat": "NO123456789MV9",
    "valid": false,
    "status": "not_found",
    "country_code": "NO",
    "cached": false
  }
]

Error codes

Norway MVA-nummer format reference

Norway is part of the European Economic Area (EEA) but not the EU, so Norwegian VAT numbers are not available via VIES. They are validated through the Brønnøysundregistrene (Norwegian Business Register) REST API. The MVA suffix distinguishes the VAT number from the organisation number.

Frequently asked questions