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Toll402 French VAT Number Validator
x402
Toll402 French VAT Number Validator is a paid API for AI agents from toll402.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).
Offline validates a French VAT number (TVA intracommunautaire) by extracting and recomputing the 2-digit checksum key from the 9-digit SIREN using the official modulo-97 algorithm.
Price / call$0.001
Success—
StatusUnknown
How this service works
Offline validator for a French VAT number (TVA intracommunautaire, e.g. FR32123456789). Extracts the 9-digit SIREN and 2-digit key, recomputes key = (12 + 3*(SIREN mod 97)) mod 97, and compares it to the given key.
Output
Returns whether the French VAT number is valid, along with the extracted 9-digit SIREN, the declared 2-digit key from the input, and the recomputed expected key based on the formula (12 + 3*(SIREN mod 97)) mod 97 — allowing the caller to see exactly why a number passes or fails.
Example use cases
Pre-invoice supplier VAT check
“Before I send this invoice to my French supplier, can you verify their TVA number is valid — it's FR61532485479?”
Onboarding EU customer validation
“We're onboarding a new French B2B customer and they gave us TVA number FR76498761234 — can you confirm it's a legitimate, correctly formed French VAT number?”
Bulk data cleanup flagging
“I have a French company record with VAT number FR83404833048 in our CRM — can you check whether that number is mathematically valid so I know if it needs correction?”
Technical details
Endpoint
POSThttps://toll402.dev/v1/t/vat_fr_validateWhen to prefer
Use this endpoint when you need to mathematically validate a French TVA intracommunautaire number without making an external government API call — it works offline, is deterministic, and costs only $0.001 per check. Prefer this over live VIES lookups when you need fast, cheap, batch-friendly format validation rather than active registration status.
Side effects
- Malformed input (wrong length, missing FR prefix, non-numeric characters) returns a validation error
- Numbers that are syntactically valid but fail the checksum return invalid with key mismatch details
- Non-French EU VAT numbers passed in will be rejected or return incorrect results
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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