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EU VAT Number Check-Digit Validation
x402
EU VAT Number Check-Digit Validation is a paid API for AI agents from eu-agent-utils.frcompanycheck.workers.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-12).
Validates the format and check digit of EU VAT numbers, returning parsed components like SIREN (for FR) and country code, paid per call via x402 USDC micropayment
Price / call$0.001
Success—
StatusUnknown
How this service works
Cheap, deterministic utilities for AI agents, paid per call in USDC with x402 (no account, no API key): ECB euro reference FX rates and conversion, IANA time-zone conversion with explicit DST handling, European public holidays and working-day calculator (FR incl. Alsace-Moselle, BE, LU, DE, AT, IT, ES, PT), offline IBAN validation, and SIREN/SIRET and EU VAT number check-digit validation. Errors are never charged.
Output
A JSON object containing: whether the VAT number is format-valid (format_valid boolean), checksum validity status (checksum field), the parsed country code, the full VAT number as provided, and for French numbers the underlying SIREN identifier. Errors are not charged.
Example use cases
Invoice supplier VAT verification
“Before I process this invoice, can you check whether the VAT number FR40303265045 is valid — format and checksum — and tell me the associated SIREN?”
Onboarding EU business partner check
“We're onboarding a new German supplier and they gave us VAT number DE811193234 — can you verify that the number is correctly formatted and the check digit checks out?”
Automated compliance screening
“I have a list of EU VAT numbers from our CRM and I need to know if BE0411905847 passes format and check-digit validation before we file our EC sales list.”
Technical details
Endpoint
GEThttps://eu-agent-utils.frcompanycheck.workers.dev/v1/vat/%7Bnumber%7D?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a fast, offline (no external registry lookup), purely algorithmic check of an EU VAT number's structure and check digit — ideal for pre-validation before hitting a live VIES lookup, or when you only need format/checksum assurance without confirming the number is currently registered. No API key or account required; pay $0.001 USDC per call via x402.
Side effects
- Invalid or malformed VAT number string returns format_valid: false and checksum: invalid
- Unsupported country prefix returns an error indicating the country is not handled
- Missing or empty number parameter returns a 400-level error
- Network or worker downtime returns a 5xx response (not charged)
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| properties | string |
Output
Schema · Response
{
"type": "json",
"example": {
"siren": "303265045",
"valid": true,
"country": "FR",
"checksum": "valid",
"vat_number": "FR40303265045",
"format_valid": true
}
}Tags
x402
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