Sending messages to thousands or even tens of thousands of recipients is not something you do by hand, one at a time. You need some software to generate them from phone numbers and a message template and send them through the Gateway. To that end, the Gateway's been designed with several APIs all built on open standards.
HTTP/HTTPS:
You can send an HTTP request to the Gateway with all the different parameters and the Gateway will send a message based on them. HTTPS was recently added, for increased security, in case you're sending the messages to the Gateway over the Internet and not from Your LAN.
JSON:
The Gateway has the optional ability to send out messages based on the SMPP (Short Message Peer-to-Peer) protocol. This enables You another form of communication with the SMS Gateway, allowing You to take advantage on existing software solutions or the plethora of existing libraries in different development platforms.
SMPP:
The Gateway has the optional ability to send out messages based on the SMPP (Short Message Peer-to-Peer) protocol. This enables You another form of communication with the SMS Gateway, allowing You to take advantage on existing software solustions or the plethora of exisiting libraries in different develpment platforms.