you can develop API with bankcore interface.
Java 1.8
Maven
Git
git clone https://github.com/asulikeit/banksystem.git
cd banksystem/atmservice
mvn clean install
cd target
java -jar atmservice-0.0.1-SNAPSHOT.jar
insert a card & get transaction id
enter pin number
just check card and pin number
list accounts after verify pin
get an account (balance, deposit, withdraw)