EU VAT validation that holds up in an audit FREE BETA

One GET request validates any EU VAT number against the official VIES registry — and returns a permanent evidence URL proving you checked, required for zero-rating intra-EU B2B supplies. We add the caching, retries and uptime that VIES itself famously lacks.

API

curl "https://vat.watchworks.dev/api/validate?vat=IT00159560366" \
  -H "X-Api-Key: sk_..."   # optional during beta

{
  "valid": true,
  "country": "IT",
  "vat_number": "00159560366",
  "company_name": "FERRARI S.P.A.",
  "company_address": "VIA EMILIA EST 1163 ...",
  "request_date": "2026-07-05T15:00:11.194Z",
  "cached": false,
  "evidence_id": "5e9b2c…",
  "evidence_url": "https://vat.watchworks.dev/evidence/5e9b2c…"
}

• Evidence pages — every check gets a permanent URL with the registered name/address and timestamp. Print to PDF, drop in your audit file.
• 24h cache — repeated checks are instant and don't re-hit VIES (which rate-limits and goes down often).
• Honest errors — when a member state's registry is down we say so with a 503, instead of returning a false "invalid".
• CORS enabled — call it straight from your checkout page.

Pricing

Get a free API key