The Twilio C# library created by Twilio affords to write code in C# to make HTTP requests to the API. Installation and usage guide are available. Because the API features implementation with telephony, voice, and messaging services, Twilio offers quick start guides in which users can receive income calls, make ongoing calls, send and receive messages, and make authorized requests.
YouMail launched its Spam Risk API. YouMail uses algorithms to analyze a database of hundreds of millions of phone numbers to determine the likelihood a particular phone number is spam. Historical call patterns and crowdsourced data are combined to determine an OK, caution, or danger designation.
In theory the rise of software-defined networking is supposed to give rise to a new class of applications that will give developers more control over, for example, location-based services. In actual practice no one is quite certain how developer will invoke SDN capabilities, but the folks at Hewlett-Packard are anxious to find out.