For every API call, there will be some credit debits from your account. If you are in testing mode the credits will be debited from your testing credit balance. By default when you sign up, we add some testing credits to your account so that you can test the APIs. Similarly, when you are in live mode, the live credit balance will be updated based on the consumption. You can request more testing credits if required or directly add live credits from the credits page. If you are unable to add live credits/testing credits please share your registered email with us for further inspection.