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Switzerland MWST/TVA/IVA Validation API

Validate Switzerland MWST/TVA/IVA numbers via REST API. Backed by UID Register (format + live) — 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/CH/CHE-123.456.789

Single validation

Validate one Switzerland MWST/TVA/IVA number. Returns full company details for valid numbers.

const res = await fetch(
  'http://localhost:3000/api/v1/validate/CH/CHE-123.456.789',
  { headers: { 'Authorization': 'Bearer YOUR_API_KEY' } }
);
const data = await res.json();
/*
{
  "valid": true,
  "status": "active",
  "company_name": "Example GmbH",
  "address": "Musterstraße 1, Switzerland",
  "country_code": "CH",
  "vat_number": "CHE-123.456.789",
  "cached": false,
  "request_id": "req_01abc..."
}
*/

Response format

{
  "valid": true,
  "status": "active",
  "company_name": "Example Switzerland Ltd",
  "address": "Musterstraße 1, Switzerland",
  "country_code": "CH",
  "vat_number": "CHE-123.456.789",
  "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": "CH", "vat": "CHE-123.456.789" },
      { "country": "CH", "vat": "CHE-123.456.789" }
    ]
  }'

[
  {
    "vat": "CHE-123.456.789",
    "valid": true,
    "status": "active",
    "company_name": "Example Ltd",
    "country_code": "CH",
    "cached": false
  },
  {
    "vat": "CHE-123.456.789",
    "valid": false,
    "status": "not_found",
    "country_code": "CH",
    "cached": false
  }
]

Error codes

Switzerland MWST/TVA/IVA format reference

Switzerland raised its VAT rate from 7.7% to 8.1% (standard) in January 2024. Swiss UID numbers follow the format CHE-XXX.XXX.XXX and are validated through the BFS UID register. Switzerland is not an EU member, so VIES does not apply.

Frequently asked questions