KYB file for a French company

What sets this file apart from an enriched record is that screening also covers every officer — almost always where the signal is — and that each block declares its source registry and as-of date. A file you can reconstruct months later in front of an auditor.

See a real response (free) Get the quote for /v1/kyb/{siren}

What the route returns

Catalogue description, exactly as agents read it:

Company lookup KYB — Know Your Business verification of a French company in one call: official company data for due diligence, compliance and customer onboarding: identity, officers, BODACC legal alerts (insolvency, deregistration), filed financials, sanctions screening of the company and each officer against the 6 official lists, computed VAT number and a completeness score. Per-block provenance: every block states its official register and as-of date.

Expected identifier

9-digit company number.

A wrongly formatted identifier returns 400 and is not billed — but it costs you a round trip. It is the leading cause of failed calls on the foreign routes.

Extract from a genuinely paid response

Dated snapshot from 2026-07-29, truncated to one item per array. It is not live data. The full extract is served free of charge from the samples surface, and the schema from the OpenAPI document.

{
 "siren": "552032534",
 "identite": {
  "denomination": "DANONE",
  "nature_juridique": "5599",
  "activite_principale": "70.10Z",
  "etat_administratif": "actif",
  "date_creation": "1955-01-01",
  "siege": {
   "siret": "55203253400703",
   "code_postal": "75009",
   "commune": "PARIS"
  },
  "nombre_etablissements": 19
 },
 "tva_intracommunautaire": "FR27552032534",
 "alertes_bodacc": {
  "procedures_collectives": [],
  "radiations": [],
  "total_annonces": 106
 },
 "finances": {
  "nombre_exercices": 8,
  "exercices": [
   {
    "date_cloture": "2024-12-31",
    "chiffre_affaires": 1030000000,
    "resultat_net": 592000000
   }
  ]
 },
 "criblage_sanctions": {
  "statut": "correspondances_a_verifier",
  "cibles": [
   {
    "cible": "DANONE",
    "role": "entreprise",
    "correspondances": []
   }
  ]
 },
 "score_completude": 100,
 "blocs_manquants": [],
 "data_freshness": "identité : stock Sirene mensuel (2026-07-01)"
}

Price and billing

Price: $0.15. The authoritative amount is the one in the 402 quote returned by the route itself — not this text, which derives from the same grid but is still just a page.

An error response cancels the payment: a 400, 404 or 503 is never billed. An upstream outage closes the route with a 503 rather than serving a degraded response.

Calling the route

# 1. Le devis, sans rien payer : la route répond 402 avec son montant
curl -i https://api.sirenic.eu/v1/kyb/552032534

# 2. L'appel réglé — le client x402 paie le devis et rejoue la requête
npx x402-fetch https://api.sirenic.eu/v1/kyb/552032534

# 3. Ou en MCP, dans Claude Code / Cursor / un agent
claude mcp add --transport http sirenic https://api.sirenic.eu/mcp

What this route does not do

No beneficial owners for France: the register has not been publicly accessible since the 2022 ruling of the Court of Justice of the European Union. This file does not fill that gap and does not claim to.

Neighbouring routes

/v1/kyb/batch — $0.105 / entité
/v1/sanctions/check — $0.02
/v1/entreprise/{siren}/dossier — $0.005

How you pay

Every route is paid per call, in USDC or EURC on the Base network, over the x402 protocol: no account to create, no API key, no subscription. The first call returns a 402 quote your client settles, then replays the call. A failed call is never billed.

Would you rather have a euro invoice and prepaid credits? That is in preparation, and we will not announce a date until it is open. Write to contact@sirenic.eu and we will let you know when it opens.

Paid responses are Ed25519-signed: you can later prove what was served to you, and when. The whole catalogue is free to read in the OpenAPI document and in llms.txt.

One call, end to end

# Client x402 (npm) — le devis 402 est réglé et l'appel rejoué automatiquement
npx x402-fetch https://api.sirenic.eu/v1/entreprise/552032534

# Ou en MCP, dans Claude Code / Cursor
claude mcp add --transport http sirenic https://api.sirenic.eu/mcp

Routes used and pricing

Route	Price	What it returns
`/v1/kyb/{siren}` (free sample)	$0.15	Company lookup KYB — Know Your Business verification of a French company in one call: official company data for due diligence, compliance and customer onboarding: identity, officers, BODACC legal alerts (insolvency, deregistration), filed financials, sanctions screening of the company and each officer against the 6 official lists, computed VAT number and a completeness score. Per-block provenance: every block states its official register and as-of date.

Take it further

No account to create, no key to request: the first step is free and shows you exactly what you would be buying.

See a real response (free) Get the quote for /v1/kyb/{siren} Get notified about euro packs