# Preparing a compliant e-invoice

What blocks an e-invoicing project is almost never the software: it is a master file with wrong company numbers and stale legal names. This route serves to prepare, not to issue — the distinction is regulatory, not rhetorical.

## What the route returns

Catalogue description, exactly as agents read it:

**Supplier onboarding: PREPARE a compliant French e-invoice under the e-invoicing mandate France September 2026 (reception obligatory for every VAT-liable company; issuance phased GE/ETI 2026, SME 2027): legal name & form, status, computed intra-EU VAT number (with VIES pointer), establishments (SIRET) with addresses, NAF code, indicative obligation dates. Preparation only - Sirenic is not an accredited platform (PDP), never accesses the central directory and never issues or routes invoices.**

## 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](https://api.sirenic.eu/exemples/), and the schema from the OpenAPI document.

```
{
 "siren": "552032534",
 "statut_diffusion": "totale",
 "destinataire": {
  "denomination": "DANONE",
  "nature_juridique": "5599",
  "etat_administratif": "actif",
  "activite_principale": "70.10Z",
  "categorie_entreprise": "GE"
 },
 "tva": {
  "numero_intracommunautaire_calcule": "FR27552032534"
 },
 "adressage": {
  "siege": {
   "siret": "55203253400703",
   "adresse": "59 RUE LA FAYETTE 75009 PARIS",
   "code_postal": "75009",
   "commune": "PARIS"
  },
  "nombre_etablissements": 19,
  "etablissements": [
   {
    "siret": "55203253400703",
    "est_siege": true,
    "adresse": "59 RUE LA FAYETTE 75009 PARIS",
    "etat_administratif": "actif"
   }
  ]
 },
 "calendrier_reforme": {
  "reception_obligatoire_depuis": "2026-09-01",
  "emission_obligatoire_depuis": "2026-09-01",
  "base_calcul": "catégorie d'entreprise INSEE : GE"
 },
 "avertissements": [],
 "data_freshness": "identité : stock Sirene mensuel (2026-07-01)",
 "disclaimer": "Données de préparation fournies à titre indicatif ; Sirenic n'émet, ne transmet ni ne route aucune facture, et ne confirme pas l'enregistrement du destinataire sur le PPF ou une PDP."
}
```

## 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/entreprise/552032534/facturation-prep

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

# 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

Preparation only. Sirenic **is not an accredited platform**, **never** accesses the central directory, and neither issues nor routes any invoice. The obligation dates served are **indicative**.

## Neighbouring routes

- `/v1/facturation/dossier` — $0.03
- `/v1/entreprise/{siren}/etablissements` — $0.003
- `/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/entreprise/{siren}/facturation-prep` | $0.02 | Supplier onboarding: PREPARE a compliant French e-invoice under the e-invoicing mandate France September 2026 (reception obligatory for every VAT-liable company; issuance phased GE/ETI 2026, SME 2027): legal name & form, status, computed intra-EU VAT number (with VIES pointer), establishments (SIRET) with addresses, NAF code, indicative obligation dates. Preparation only - Sirenic is not an accredited platform (PDP), never accesses the central directory and never issues or routes invoices. |

> ⚠️ Sirenic is not an accredited French e-invoicing platform (PDP), never accesses the central directory, and neither issues, transmits nor routes any invoice.

## Take it further

- [See a real response (free)](https://api.sirenic.eu/exemples/entreprise-siren-facturation-prep.json)
- [Get the quote for /v1/entreprise/{siren}/facturation-prep](https://api.sirenic.eu/v1/entreprise/552032534/facturation-prep)
- [Get notified about euro packs](mailto:contact@sirenic.eu?subject=Euro%20credit%20packs)

## Read next

- [Preparing supplier master data for the French e-invoicing mandate](https://api.sirenic.eu/en/use-cases/french-e-invoicing-get-your-supplier-master-data-ready)

---

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/