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EU VAT Number Validation via VIES (W System API)
x402
EU VAT Number Validation via VIES (W System API) is a paid API for AI agents from api.wsystem.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-30).
Validates an EU VAT number against the official VIES system, returning validity status, registered business name, address, and a consultation (proof) number for all 27 EU member states plus Northern Ireland (XI).
Price / call$0.01
Success—
StatusUnknown
How this service works
EU VAT number validation via official VIES (all 27 EU states + XI): valid/invalid, name, address, consultation (proof) number
Output
Returns a JSON object containing the queried VAT number, whether it is valid or invalid, the registered business name, the registered address, and a unique consultation number that serves as official proof of the VIES query — suitable for audit and compliance documentation.
Example use cases
Supplier VAT check before invoicing
“Before I issue this B2B invoice, verify that the VAT number DE811128135 is active on VIES and give me the company name and address tied to it.”
Onboarding KYB for EU business customers
“We're onboarding a new business customer who gave us VAT number FR40303265045 — can you confirm it's valid and pull the registered name and address from VIES?”
Audit-ready VAT proof for accountant
“I need to prove that GB123456789 was a valid VAT number at the time of the transaction — validate it through VIES and get me a consultation number I can attach to the audit file.”
Technical details
Endpoint
GEThttps://api.wsystem.dev/verify?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need authoritative, real-time EU VAT number validation directly from the official VIES system with a consultation number as legal proof. Prefer it over unofficial or cached VAT checkers when audit-readiness, B2B invoice compliance, or KYB onboarding requires an official government-backed response. It covers all 27 EU member states plus Northern Ireland (XI prefix), making it the most comprehensive single-call option for EU VAT validation.
Side effects
- Invalid VAT format (missing or wrong country prefix) — returns error or invalid status
- VIES service temporarily unavailable (EU system downtime) — may return an error or timeout
- VAT number not found in VIES — returns valid: false with no name/address
- Non-EU country prefix passed — not supported, returns error
- Payment failure (x402 protocol) — call not executed
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"vat": "IE6388047V",
"name": "GOOGLE IRELAND LIMITED",
"valid": true,
"status": "valid",
"address": "3RD FLOOR, GORDON HOUSE, BARROW STREET, DUBLIN 4",
"consultation_number": "WAPIAAAAaE_hpYRy"
}
}Tags
x402
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