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chainverdict.xyz EU VAT Number Format Validator
x402
chainverdict.xyz EU VAT Number Format Validator is a paid API for AI agents from chainverdict.xyz, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).
Validates the structure and check digits of an EU VAT number by country-specific rules, without performing a live VIES registry lookup.
Price / call$0.001
Success—
StatusUnknown
How this service works
Validate an EU VAT number's structure and per-country check digits. Format only — no VIES lookup, so it does not confirm the registration is active or belongs to the named trader.
Output
Returns whether the EU VAT number passes structural validation and check digit rules for the given country prefix, without confirming active VIES registration or trader identity.
Example use cases
E-commerce checkout VAT validation
“Before I save this customer's billing details, check if the VAT number they entered — FR83404833048 — is structurally valid and has the right check digits.”
Finance team invoice processing
“We received an invoice with VAT number IT12345678901 — can you verify whether that number has the correct format and check digits for Italy before we process the payment?”
SaaS onboarding B2B verification
“A new business just signed up and entered NL123456789B01 as their VAT number — can you do a quick format and check digit validation on it so we know it's at least structurally plausible?”
Technical details
Endpoint
GEThttps://chainverdict.xyz/v1/validate/vat/:vatWhen to prefer
Choose this endpoint when you need a fast, cheap ($0.001), offline-style format check of an EU VAT number — e.g., during form validation, invoice ingestion, or pre-screening — and do not need to confirm the number is actively registered in VIES or belongs to a specific named trader. It is not a substitute for a live VIES lookup when regulatory confirmation of active status is required.
Side effects
- Malformed or missing VAT number path parameter returns an error
- Unrecognized country prefix may return invalid or unsupported country error
- VAT number with correct format but belonging to an inactive or non-existent business will still pass (format-only check)
- Non-EU VAT numbers are not supported
- Network timeout or service unavailability returns a 5xx error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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