The Callsign API allows developers to access and integrate the functionality of Callsign with other applications. Public documentation is not available; interested developers should register for API and documentation access. Callsign is an artificial intelligence company that provides security solutions.
Sixteen APIs have been added to the ProgrammableWeb directory in categories including Messaging, Mapping, Air Travel, and Customer Service. Highlights include Facebook Messenger Broadcast API, plus APIs from Mobius, Nylas and Apptivo. Here's a rundown of the latest additions.