fair-rose•4w ago

Custom function Doesn't return response n8n + Vapi

Hello I am trying to make a custom Function and return availability to VAPI but I keep getting this error: I also included my respond webhook as well. any ideas ?

3 Replies

Vapi•4w ago

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Vapi Support Bot•4w ago

Thanks for sharing the details! Based on the error and your description, a common cause is returning a JSON object (not a string) in the result field of your webhook response. Could you confirm:
Are you returning the result as a single-line string (not an object or array) in your results array, like this?

{
  "results": [
    {
      "toolCallId": "call_casKyF5DieBITQ3MAMHH",
      "result": "Your availability details as a single-line string"
    }
  ]
}

{
  "results": [
    {
      "toolCallId": "call_casKyF5DieBITQ3MAMHH",
      "result": "Your availability details as a single-line string"
    }
  ]
}

If not, updating your response to match this format should resolve the "No result returned" error.
See troubleshooting guide Source: - Custom tools troubleshooting

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Vapi•4w ago

Hi Чебурашка, How can I assist you today with your Vapi setup or integration? If you have any issues or questions, feel free to share the details. I’m here to help.

Custom function Doesn't return response n8n + Vapi

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