HTTP REST API DEVELOP,EMT -Make GOIP GSM Server work along with Sendroid app

OBJECTIVE : I want to provide SMS service for resellers and customers. YOUR OBJECTIVE: Make Goip gsm gateway device to work along with Sendroid App. SCENARIO: Following "ingredients" need HTTP REST API to " talk" each other. 1. SMS Web app called Sendroid from CodeCanyon. Sendroid lets me create resellers, accounts, set SMS limits per day, make paypal payments, see SMS history etc. 2. GOIP GSM Gateway: This device works to connect a Internet session with a GSM network. CURRENT SITUATION: -Sendroid has been installed in a cloud server and you can reach it thru Web to set up parameters. See demo [login to view URL] -GOIP is accessible from WAN. Inside of it's ControlPanel there is an option to SEND SMS (for testing) and it works fine, I mean SMS sent were received by other party. See manual related with HTTP [login to view URL]