To get api key and site id for BillPlzhttps://www.billplz.com/ payment gateway. login to your dashboard panel using this url https://dashboard.billplz.com
Step 01: Click on your profile then click on settings
Step 02: go to Keys & Integration section, click on Billplz Secret Key and Xsignature Payment
Step 03: now you have to create a payout form to get your collection key. click payment form then click create collection
Step 04: then copy last part of collection form url
Step 05: Now Go to your script admin panel > General settings > Payment Gateway Settings > BIllplz Settings
add all the info it has asked