IBAN check API

Check IBANs automatically in your app

Use the IBAN-Test API to check IBAN syntax, country-specific length, check digits and available bank data from your own forms, shops and back-office tools.

Get API keyView API documentation

Use the check before users submit payment data

An IBAN check API gives immediate feedback while users enter payment details. This reduces manual correction work and keeps invalid payment data out of your system.

Payment forms

Validate IBANs before checkout, onboarding or direct debit forms are submitted.

Customer master data

Check newly entered or imported IBANs before they are used for payouts or collections.

Bank data hints

Return available bank information for supported countries, including institution, city or BIC.

curl -H "Authorization: Bearer YOUR_API_TOKEN" \
  "https://www.iban-test.eu/api/iban/validate?iban=DE89370400440532013000"

For broader API positioning and payment workflow use cases, see the main IBAN Validation API page.

IBAN Validation APISEPA IBAN Validation APITry IBAN Check

Bank data validation

Validation against bank directories

For these countries, we check IBANs against available bank directories and return bank details such as institution, city and BIC when available.

DEGermany ATAustria BEBelgium FRFrance LULuxembourg NLNetherlands PTPortugal ESSpain

IBAN syntax check

Format checks for 111 IBAN countries

Check IBANs for a valid structure, correct length and checksum. This helps you catch typos and transposed digits before a payment fails. Additional bank validation against real bank directories is available for the countries listed above.

MCP Server for AI Agents - Connect AI clients to IBAN validation tools - https://www.iban-test.eu/mcp - MCP Documentation