IBAN validation API

Validate IBANs before payments fail

Use the IBAN-Test REST API to validate IBAN format, country rules, check digits and available bank data before IBANs enter your payment workflow.

Get API key View API documentation

Built for forms, SaaS products and payment workflows

IBAN validation is most useful before a customer submits a form, before SEPA data is stored and before payment files are generated. The API lets you run the same checks automatically in your own application.

Catch input errors

Detect invalid lengths, wrong country formats and failed IBAN check digits before payment data is saved.

Use bank data where available

For supported countries, return bank details such as institution, city or BIC when directory data is available.

Automate validation

Integrate IBAN checks into onboarding, checkout, ERP, accounting and back-office processes.

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

A formally valid IBAN does not automatically prove that an account exists or can receive payments. IBAN-Test helps reduce avoidable input and plausibility errors before submission.

IBAN Check API SEPA IBAN Validation API MCP Server for AI Agents

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.

ALAlbania ADAndorra ATAustria BEBelgium BGBulgaria HRCroatia CYCyprus CZCzech Republic DKDenmark EEEstonia FIFinland FRFrance DEGermany GIGibraltar GRGreece HUHungary ISIceland IEIreland ITItaly LVLatvia LILiechtenstein LTLithuania LULuxembourg MTMalta MDMoldova MEMontenegro NLNetherlands MKNorth Macedonia NONorway PLPoland PTPortugal RORomania SMSan Marino RSSerbia SKSlovakia SISlovenia ESSpain SESweden CHSwitzerland VAVatican City

IBAN syntax check

Format checks for 115 IBAN formats

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 – API documentation