B2B prospecting over the official registry

A list built on the registry is fresh by construction, where a purchased file ages the moment it is exported. The thing to watch is economic, not technical: each page is a payment, so an over-broad filter costs the price of pagination. Check the sector statistics before paging.

See a real response (free) Get the quote for /v1/prospection

What the route returns

Catalogue description, exactly as agents read it:

French B2B prospecting and lead generation over the full official French company registry (29.8M companies): build targeted company lists with multi-criteria filters — NAF/APE activity code, departement or postal-code prefix, legal form, workforce bracket, company age, active RGE environmental certification, gender-equality index. Returns 100 active companies per page; each page is one payment. Combine filters to narrow a market segment into fresh, registry-grade company lists for France.

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.

{
 "criteres": {
  "naf": "62.01Z",
  "departement": "75",
  "page": 1
 },
 "nombre_resultats": 100,
 "page": 1,
 "page_suivante": true,
 "resultats": [
  {
   "siren": "100000348",
   "denomination": "LES EDITIONS DIGITALES",
   "activite_principale": "62.01Z",
   "forme_juridique": "5710",
   "tranche_effectif_salarie": "NN",
   "date_creation": "2026-01-15",
   "code_postal_siege": "75011",
   "commune_siege": "PARIS"
  }
 ]
}

Price and billing

Price: $0.02. 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/prospection

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

# 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 e-mail addresses, no phone numbers, no named contacts: that data is not in the official registries. We deliver qualified companies, not contact details.

Neighbouring routes

/v1/recherche — $0.002
/v1/secteur/{code_naf}/benchmarks — $0.05
/v1/kyb/batch — $0.105 / entité

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	Sample	What it returns
`/v1/prospection`	$0.02	free sample	French B2B prospecting and lead generation over the full official French company registry (29.8M companies): build targeted company lists with multi-criteria filters — NAF/APE activity code, departement or postal-code prefix, legal form, workforce bracket, company age, active RGE environmental certification, gender-equality index. Returns 100 active companies per page; each page is one payment. Combine filters to narrow a market segment into fresh, registry-grade company lists for France.

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/prospection Get notified about euro packs