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Toll402 SIRET Validator
x402
Toll402 SIRET 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).
Validates a French SIRET (14-digit establishment identifier) by splitting into SIREN and NIC components and verifying the Luhn checksum offline.
Price / call$0.001
Success—
StatusUnknown
How this service works
Offline validator for a French SIRET (14-digit establishment identifier): splits it into SIREN (first 9 digits) and NIC (last 5 digits), normalizes input by stripping spaces, and checks that the full 14-digit string satisfies the Luhn (mod 10) checksum algorithm.
Output
Returns a validation result indicating whether the SIRET passes the Luhn checksum, along with the parsed SIREN (first 9 digits) and NIC (last 5 digits) components extracted from the normalized input.
Example use cases
E-commerce supplier onboarding check
“We're onboarding a new French supplier and they gave us SIRET 35600000036691 — can you verify it's a valid SIRET before we add them to our system?”
Form input validation before submission
“A user just typed '362 521 879 00034' into our French business ID field — can you validate that SIRET (stripping the spaces) before we submit the form?”
Batch vendor data quality audit
“I have this SIRET from our vendor records — 40483304800022 — can you tell me if it passes the Luhn checksum and what the SIREN and NIC parts are?”
Technical details
Endpoint
POSThttps://toll402.dev/v1/t/siret_validateWhen to prefer
Use this endpoint when you need a fast, offline, no-external-dependency check of a French SIRET number's structural validity and Luhn checksum. Ideal for form validation, supplier onboarding pipelines, or data quality audits where you only need format/checksum verification rather than a live registry lookup confirming the business is active.
Side effects
- Invalid SIRET that fails Luhn checksum — returns validation failure with details
- Input shorter or longer than 14 digits after normalization — returns format error
- Non-numeric characters other than spaces present — returns parse or normalization error
- Network or payment failure — HTTP 402 or connectivity error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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