Cloud-based RESTful web service API supports building phone applications that answer inbound calls and initiate outbound calls (phone, Skype, or SIP), interact with Web applications, and send/receive SMS text messages. XML or JSON responses from your Web pages over HTTP trigger PhoneML, TwiML, and VoiceML scripts to deliver interactive voice response (IVR) telephony applications. Options include playing MP3 or WAV files, speaking text-to-speech prompts, collecting digits and spoken commands, recording audio, dialing numbers, transferring calls, etc.
The following is a list of SDKs from our SDK directory that matched your search term. Though your definition of an SDK may differ, in our world, we define SDKs as platform- specific tools for consuming existing APIs of the sort we list in our API directory. For example, the Ruby SDK for consuming the Twitter Ads API. If you think an SDK, API, or other asset is missing from our directory, be sure to check our guidelines for making contributions to ProgrammableWeb.