How does Call API using VoiceXML work for outbound calls?

  • How can I use Call API?
  • What IP does VoiceXML use?
  • Does VoiceXML support SSL or HTTPS?


When you initiate an API request, we connect your call and run the script. You can play text-to-speech, play audio files, create voicemails, create IVR menus with call transfer or transfer the call to a phone number.

Example VoiceXML scripts can be found in our documentation.

If you are using a firewall, you should whitelist the following IPs:

We discourage anybody from using HTTPS for VoiceXML URLs, as we are only able to support SHA-1 certifications which are vulnerable. We advise all of our customers to use HTTP for the VoiceXML URLs.

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