Example [Sending to Mobile(s)] http://cliqsms.com?user=xxx&password=yyy&mobile=234XXXXXXX,234XXXXXXX&
senderid=cliqsms.com&message=hello&unicode=1&schedule=yyyy:mm:dd:hh:mm:ss

Example [Sending to Group(s)] http://cliqsms.com?user=xxx&password=yyy&group_id=1,2&
senderid=cliqsms.com&
message=hello&unicode=1&schedule=yyyy:mm:dd:hh:mm:ss

Response Codes 1111:SUCCESS:SMS Submitted Successfully. (mobilecount=x, creditsused=y)
When all the mobile numbers are accepted for delivery.
1112:SUCCESS:SMS Submitted Successfully. (mobilecount=x, creditsused=y, failedcount=z)
When there are few numbers which are not accepted for delivery
1113:SUCCESS:SMS Scheduled Successfully
1001:ERROR:Invalid URL. User cannot be empty
1001:ERROR:Invalid URL. Password cannot be empty
1001:ERROR:Invalid URL. Mobile or Group id cannot be empty
1001:ERROR:Invalid URL. Message cannot be empty
1005:ERROR:Invalid value in username or password field
1030:ERROR:Account doesn't exist
1010:ERROR:Account expired
1015:ERROR:Your credits are Low
1020:ERROR:Invalid Sender
1040:ERROR:You are not allowed to send Unicode Messages
1050:ERROR:Character count is greater than X 1060:ERROR:Invalid Group id Specified
1070:ERROR:Invalid schedule time
1080:ERROR:Unable to schedule message
1090:ERROR:Unable to send message
1100:ERROR:Message has been waitlisted (mobilecount=x)

For SMPP API, click here