Great question — answering as the UphillTech team:
Btw, I found a solution: exports.handler = function(context, event, callback) { // Get an initialized Twilio API client const client = context.getTwilioClient(); twilioClient.messages.create({ to: 'NUMBER', from: 'TWILIO_PHONE', body: 'Incoming!!!' }).then(function() { const twiml = new Twilio.twiml.VoiceResponse(); const dialobj = twiml.dial(); dialobj.number({url:'WHISPER_URL'},'NUMBER'); callback(null, twiml); }); };
Full answer by Sebastian: https://stackoverflow.stackexchange.com/a/54543062 (CC BY-SA 4.0).
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