iCall is a service that offers free phone calls and VoIP, instant messaging, SMS services, and group messaging features via web and mobile applications.
The iCall API allows developers to access and integrate iCall functionality into other applications. Some example API methods include sending SMS messages, routing calls, building call trees, and creating group messaging collaboration tools. Public documentation is not available; interested developers should register here: https://my.icall.com/registration for access.
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