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Invalid Content-Type



ERROR: 12300

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ERROR

Twilio is unable to process the Content-Type of the provided URL. Please see Twilio's documentation on accepted content types (link takes you to an external page) for more information on valid Content-Types.

You must return a Content-Type for all requests. Requests without a Content-Type will appear in the Debugger as a 502 Bad Gateway error.

Possible Causes

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  • Having a phone number, outgoing call request or action attribute refer to a non-XML or audio resource.
  • Having a Play verb attempt to play non-audio content, such as XML or text.

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