To use PointSMS API's is a very easy thing.

Take a look at the syntax example for sending sms:

https://demo.pointsms.org/sms.php?username=username&password=password&to=mobile_number&text=sms_text

• HTML form example using post method

Adding new credits through api.

Syntax:

http://demo.pointsms.org/credits_api.php?username=ADMIN_USER&password=ADMIN_PASS&client_username=CLIENT_USER&new_credit= &reset=0or1