what is blue api code example

Example: bluecode api

curl -d "merchantId=1234567" \
     -d "projectId=1234" \
     -d "merchantTxId=1234567890" \
     -d "amount=10000" \
     -d "currency=EUR" \
     -d "purpose=Beispieltransaktion" \
     -d "urlRedirect=http://www.my-domain.de/girocheckout/redirect" \
     -d "urlNotify=http://www.my-domain.de/girocheckout/notify" \
     -d "hash=1189b707a5eeab6ba79e6dc937abad0d" \
     https://payment.girosolution.de/girocheckout/api/v2/transaction/start