The Vocode API allows you to configure your outbound call agent’s behavior when the other end of a phone call is an answerphone as well as subscribe to events relating to machine detection.

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Example 1: Hang up the call if it goes to voicemail

The on_no_human_answer parameter defines what should happen if a machine answers the phone.

from vocode import CreateCallAgentParams, PromptParams

vocode_client.calls.create_call(
    from_number="<YOUR VOCODE NUMBER>",
    to_number="15555555555",
    agent=CreateCallAgentParams(
        prompt=PromptParams(
            content="Ask Ajay if his refrigerator is running"
        ),
    ),
    on_no_human_answer="hangup",
)

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Example 2: Hook into when a call goes to voicemail

If you’d like the bot to stay on the call and leave a voicemail, set on_no_human_answer to "continue". You can also configure a webhook to be fired when the answering machine detection status is populated.

from vocode import CreateCallAgentParams, PromptParams

vocode_client.calls.create_call(
    from_number="<YOUR VOCODE NUMBER>",
    to_number="15555555555",
    agent=CreateCallAgentParams(
        prompt=PromptParams(
            content="Ask Ajay if his refrigerator is running"
        ),
        webhook=WebhookParams(
            url="<YOUR WEBHOOK URL>",
            subscriptions=["event_human_detection"]
        )
    ),
    on_no_human_answer="continue"
)

Once the call is picked up, the webhook URL configured above will get the following POST request:

{
  "type": "event_human_detection",
  "call_id": "<some UUID>",
  "payload": {
    "result": "no_human" # or "human"
  }
}

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On the horizon

Stay tuned for more features here, for example:

  • Instructing your agent to leave a particular voicemail
  • Routing the call to a human when a human picks up, otherwise leave a voicemail
Retrieve Call DataDo Not Call Detection