Yes, we integrate with XenCALL.
XenCALL's CMS allows users to send their clients SMS through ClickSend.
To do this all you have to do is use your ClickSend username and API Key with their system, these can be found on your ClickSend Dashboard.
By sending sms through XenCALL your ClickSend account will be charged and all messages will be logged.
XenCALL does not currently show response SMS messages clients send back, but they are visible on the ClickSend dashboard. You can mange what happens with inbound SMS here: https://dashboard.clicksend.com/#/sms/settings/inbound-sms