EU VAT number validator
Validate an EU VAT number against the European Commission’s official VIESservice. Pass a full VAT id including its two-letter country code; the API returns whether it’s valid and, when the member state exposes it, the registered name and address.
curl "https://www.checkfmt.com/api/v1/vat?vat=DE811569869&key=YOUR_KEY"
{ "vatNumber": "DE811569869", "countryCode": "DE", "valid": true, "name": "…", "source": "EU VIES" }Notes: VIES covers EU member states only and is occasionally down for maintenance — the API returns a clear
502 to retry on, rather than a false negative. A valid VAT id confirms registration, not the trading status of the business.