composer require oneso/ckonto
# Set your account key
Ckonto::setKey("demo");
# Check bank account number and bank code
$bankCheck = Ckonto::checkBank(
AccountNumber::fromNumber("76543210"),
BankCode::fromCode("1234567890"),
Sepa::getDefault()
)->check();
# Check iban and bic
$ibanCheck = Ckonto::checkIban(
Iban::fromIban("DE07100500006603032331"),
Bic::fromBic("BELADEBEXXX"),
Sepa::getDefault()
)->check();
# Search
$search = Ckonto::search(
BankCode::fromCode("1234567890"),
Location::fromCity("Berlin"),
Name::fromName("Postbank"),
Zip::fromZip("123"),
Max::getEmpty()
)->search();
For more information read: https://www.ckonto.de/download/cKonto.de_XML_Schnittstelle.pdf