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EU VAT Check
x402
EU VAT Check is a paid API for AI agents from 402.com.tr, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).
Validates an EU VAT number offline against country prefix rules, national format patterns, and check-digit algorithms for 8 countries, distinguishing format-only validation from checksum-verified results.
Price / call$0.002
Success—
StatusUnknown
How this service works
Validate an EU VAT number offline: country prefix, national format, and the published check-digit algorithm for the 8 countries that have one (BE, DE, FR, IT, LU, NL, PL, PT). The response says which of the two you got — checksumChecked distinguishes a verified number from a format-only pass, because they are not the same strength of answer. Registration is deliberately NOT claimed: only VIES can say whether a number is registered, and this endpoint does not call it.
Output
Returns a validation result indicating whether the VAT number is valid according to format rules and, where applicable, the published check-digit algorithm. The checksumChecked flag distinguishes a checksum-verified result from a format-only pass, making clear the strength of the validation. Notably, this endpoint does not check VIES registration status — it only validates structure and check digits offline.
Example use cases
Invoice validation before payment
“Before I pay this supplier invoice, can you validate their VAT number FR40303265045 — does it pass the French format rules and check-digit test?”
Onboarding EU business partner
“We're onboarding a new Italian supplier and they gave us VAT number IT12345678901 — can you check if it's a valid format and whether the check digit verifies?”
Pre-screening before VIES lookup
“I want to do a quick offline format check on VAT number NL123456782B01 before spending money on a live VIES registration lookup — does it pass Dutch format and checksum validation?”
Technical details
Endpoint
GEThttps://402.com.tr/api/x402/vat-checkWhen to prefer
Use this endpoint when you need a fast, cheap, offline validation of an EU VAT number's format and check digit before making an expensive live VIES API call. It is ideal for pre-screening VAT numbers during onboarding, invoice processing, or form validation workflows. Prefer it when you only need to know if the number is structurally valid — not whether it is currently registered — and when you want the checksumChecked flag to distinguish strong from weak validation.
Side effects
- Invalid or unrecognized country prefix returns format error
- VAT number fails national format regex — returns invalid format
- Check digit mismatch for supported countries (BE, DE, FR, IT, LU, NL, PL, PT) — returns failed checksum
- Missing or empty vat query parameter returns bad request
- Countries without a published check-digit algorithm return format-only result with checksumChecked=false
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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