​
Voice calls

When your application is initiated to make a call, Plivo makes an HTTP request to the answer_url, which is one of the mandatory parameters when making an outbound call.

​
SMS

When your application is initiated to send a message, Plivo makes an HTTP request to the message_url, which is one of the mandatory parameters when sending a message.

​
Requirements

  • The answer_url or the message_url should respond with an XML document that provides instructions to control the call.
  • The Content Type of the response header, returned by the message_url, must be set to text/xml or application/xml.
  • The XML document returned should contain valid Plivo XML elements.