# 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.

## 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](https://api.sirenic.eu/exemples/), 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` — $0.001
- `/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](mailto:contact@sirenic.eu?subject=Euro%20credit%20packs) 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](https://api.sirenic.eu/openapi.json) and in [llms.txt](https://api.sirenic.eu/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/prospection` | $0.02 | 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

- [See a real response (free)](https://api.sirenic.eu/exemples/prospection.json)
- [Get the quote for /v1/prospection](https://api.sirenic.eu/v1/prospection)
- [Get notified about euro packs](mailto:contact@sirenic.eu?subject=Euro%20credit%20packs)

## Read next

- [Building a B2B prospecting list](https://api.sirenic.eu/en/use-cases/build-b2b-prospecting-list-from-official-french-registry)

---

Volume figures on this page were measured in our database on 2026-08-19. They are dated snapshots, not live counters.

Full catalogue : https://api.sirenic.eu/