Validates an IBAN and returns the bank it belongs to. IBANs from any of the supported countries (currently 14, e.g. AE, GB, and SEPA countries such as FR, DE, ES, IT, NL) are accepted. Useful for verifying a recipient's bank details before creating them.

This endpoint always returns 200 OK for a well-formed request — an invalid IBAN is not an error, it's reflected by valid: false in the response. When valid is false, country_code, bic_code, and bank_name are omitted, and an errors array is included instead, e.g.:

{ "iban": "AE0700000000000000000000", "valid": false, "errors": ["bad_check_digits"] }

Possible errors values: too_short, bad_chars, unknown_country_code, bad_length, bad_bban_format, bad_check_digits.