# Verify a Belgian or Polish supplier

The Polish check is worth knowing, because it has a direct financial consequence: paying an undeclared account above 15,000 zloty costs the buyer the VAT deduction and triggers joint liability. It is the only one of our IBAN checks that queries a tax register, not merely a format.

## What the route returns

Catalogue description, exactly as agents read it:

**European invoice verification and supplier verification for e-invoicing compliance in Belgium (mandate live since 1 Jan 2026) and Poland (KSeF): official registry identity, VAT check against VIES, Peppol reachability (BE), IBAN form + key check, bank identified and, in Poland, the official White List: is the IBAN DECLARED by the taxpayer? Paying an undeclared account over 15,000 PLN costs the buyer the VAT deduction and joint liability. Deterministic pret_a_facturer verdict, closed-list reasons.**

## 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.

```
{
 "pays": "BE",
 "id": "0403199702",
 "destinataire": {
  "denomination": "BNP Paribas Fortis",
  "etat": null
 },
 "tva": {
  "numero": "BE0403199702",
  "statut": "valide"
 },
 "peppol": {
  "joignable": true,
  "identifiant": "0208:0403199702",
  "nom_enregistre": "BNP Paribas Fortis NV",
  "documents": [
   "Invoice"
  ],
  "accepte_facture_en16931": true
 },
 "banque": null,
 "mandat": {
  "obligation": "facturation électronique structurée entre assujettis",
  "en_vigueur_depuis": "2026-01-01",
  "canal_par_defaut": "Peppol (art. 13ter, présomption réfragable)"
 },
 "verdict": {
  "pret_a_facturer": true,
  "raisons": [
   {
    "code": "iban_non_fourni",
    "niveau": "information",
    "source": "Paramètre `iban` absent — contrôle bancaire non effectué."
   }
  ]
 },
 "source": "Banque-Carrefour des Entreprises (BCE/KBO), VIES (Commission européenne), annuaire Peppol, registres bancaires officiels."
}
```

## Price and billing

Price: **$0.03**. 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/eu/facturation/dossier

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

# 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

Scope limited to Belgium (mandate live since 1 January 2026) and Poland. For France, use the French invoicing-pack route; for other states, VAT validation alone.

## Neighbouring routes

- `/v1/facturation/dossier` — $0.03
- `/v1/tva/verifier/{numero}` — $0.003
- `/v1/eu/entreprise/{pays}/{id}` — $0.01

## 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/eu/facturation/dossier` | $0.03 | European invoice verification and supplier verification for e-invoicing compliance in Belgium (mandate live since 1 Jan 2026) and Poland (KSeF): official registry identity, VAT check against VIES, Peppol reachability (BE), IBAN form + key check, bank identified and, in Poland, the official White List: is the IBAN DECLARED by the taxpayer? Paying an undeclared account over 15,000 PLN costs the buyer the VAT deduction and joint liability. Deterministic pret_a_facturer verdict, closed-list reasons. |

> ⚠️ The IBAN check is not a payee verification: neither the account holder's name nor the account's existence is checked (verification_titulaire: non_disponible).

> ⚠️ 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/eu-facturation-dossier.json)
- [Get the quote for /v1/eu/facturation/dossier](https://api.sirenic.eu/v1/eu/facturation/dossier)
- [Get notified about euro packs](mailto:contact@sirenic.eu?subject=Euro%20credit%20packs)

## Read next

- [Verify a supplier before you pay them](https://api.sirenic.eu/en/use-cases/verify-supplier-before-payment-identity-vat-iban)

---

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/