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Greeneris SIRET/SIREN Validator
x402
Greeneris SIRET/SIREN Validator is a paid API for AI agents from data.greeneris.io, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).
Offline Luhn-based validation of French company numbers (SIREN or SIRET) with La Poste exception support, returning validity, type, and parsed components
Price / call$0.001
Success—
StatusUnknown
How this service works
Instant pre-validation of French company numbers before invoicing or costly Sirene API calls. Auto-detects SIREN (9 digits) vs SIRET (14 digits), applies the INSEE Luhn rule and the documented La Poste exception (356000000*: digit sum mod 5). Query: ?number=44306184100047 (spaces/dots/dashes tolerated). Returns valid, type, siren, nic and the rule applied. Pure offline computation, 1y cache.
Output
Returns a JSON object with: `valid` (boolean), `type` (SIREN or SIRET), `siren` (first 9 digits), `nic` (last 5 digits for SIRET), and `rule` (standard Luhn or La Poste exception). Pure offline computation, no external API call, cached for 1 year.
Example use cases
Example prompt
“Before I generate this invoice, can you check whether the French company number 44306184100047 is a valid SIRET — and tell me which rule it passed?”
Technical details
Endpoint
GEThttps://data.greeneris.io/v1/fr/siret-checkWhen to prefer
Use this endpoint when you need instant, offline pre-validation of French SIREN or SIRET numbers before invoicing, before querying the official Sirene API (which is slower and rate-limited), or before executing a payment. It handles both 9-digit SIREN and 14-digit SIRET formats, applies the standard INSEE Luhn rule and the documented La Poste exception (356000000*), tolerates formatting separators, and costs only $0.001 per call with a 1-year cache. Prefer it over the live Sirene registry search when you only need format/checksum validity, not company metadata.
Side effects
- Number parameter missing — returns 400 bad request
- Input is not 9 or 14 digits after stripping separators — returns invalid with type unknown
- Number fails both standard Luhn and La Poste exception — returns valid: false
- Non-numeric characters beyond allowed separators (spaces, dots, dashes) — likely returns 400 or invalid
- Payment not completed (x402 protocol) — returns 402 Payment Required
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"nic": "00047",
"rule": "luhn",
"type": "siret",
"siren": "443061841",
"valid": true,
"number": "44306184100047",
"source": "offline INSEE formation rule: Luhn checksum + La Poste exception (no registry lookup)"
}
}Tags
x402
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