Bank Data API is a REST API that is able to check and validate IBAN and SWIFT numbers. With this API you will be able to get IBAN examples and structure by country, required fields for generating IBANs, banks by country, and all major banks and SWIFT codes.

Response example. If you want to see more check the documentation.
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Bank Data API is a REST API that is able to check and validate IBAN and SWIFT numbers. With this API you will be able to get IBAN examples and structure by country, required fields for generating IBANs, banks by country, and all major banks and SWIFT codes.
The Bank Data API is a product built and maintained by APILayer, a technology company that provides a variety of reliable and essential APIs for developers. APILayer’s APIs are affordable for both startups and larger companies. APILayer GmbH is headquartered in Vienna, Austria.