The API is a new feature that allows users to interact with external applications via SMS and send messages users on other HBLink servers. The API is built into the D-APRS dashboard. All interaction takes place over HTTP POST requests in JSON format. This allows a single application to be used by multiple servers. Applications can be delevopen in multiple langauges.
There are presently 3 modes for data exchange, "msg_xfer", "app", and "raw". msg_xfer is used to send a message. With msg_xfer, there are 2 authentication types, "public" and "private".