Check an IBAN and identify its bank

What the route returns

Catalogue description, exactly as agents read it:

IBAN verification and bank validation for SEPA payments: a FORM check to verify a supplier before payment — ISO 13616 structure + mod-97 key, plus bank identification from FREE official sources (FR via ACPR/REGAFI incl. LEI and SIREN; BE NBB; AT OeNB incl. LEI; NL BIC list; DE Bundesbank file). French BICs via GLEIF/SWIFT BIC-to-LEI. NOT a payee verification for instant payments: neither the holder name nor the account's existence is checked (verification_titulaire: non_disponible).

Expected identifier

An IBAN, without spaces.

A wrongly formatted identifier in the path 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. A search parameter, by contrast, is cleaned up: unsupported characters are stripped and the usable query is served.

Price and billing

Price: $0.005. 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.

What this route does not do

This is not a payee verification for instant payments: neither the holder's name nor the account's existence is checked, and the response says so (verification_titulaire: non_disponible). Against bank-details fraud it reduces the risk; it does not remove it.

Neighbouring routes

• /v1/facturation/dossier: $0.03
• /v1/facture/verifier: $0.02

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

# x402 client (npm): the 402 quote is settled and the call replayed automatically
npx x402-fetch https://api.sirenic.eu/v1/entreprise/552032534

# Or over MCP, in Claude Code / Cursor
claude mcp add --transport http sirenic https://api.sirenic.eu/mcp

Routes used and pricing

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).

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/iban/verifier/{iban} Get notified about euro packs

Read next

• Verify a supplier before you pay them

OpenAPI · llms.txt · Full route catalogue and pricing