I have my assistant set up already and working. And I created a calendar booking and availability check workflow on make which is equally working and booking appointments. Issue: 1. When the workflow returns the available time schedule on webhook response, the voice ai still says no available time. 2. When the workflow books appointments successfully. It still says u available for booking in the voice @Sven @Arvind @Vapi

Hi there! 👋 I see you're having issues with your Vapi assistant not correctly interpreting the webhook responses from your Make workflow. Unfortunately, I can't see your specific Make workflow setup or Vapi assistant configuration. However, I can help with common issues that cause webhook responses not to be properly interpreted by Vapi assistants for calendar booking and availability checks. Based on the information I found, here are some potential solutions to your issues: ## 1. Check Your Webhook Response Format The most common issue is incorrect JSON formatting in your webhook response. Vapi expects a very specific format:

json
{
    "results": [
        {
            "toolCallId": "X",
            "result": "Y"
        }
    ]
}

Where: - "X" must exactly match the

toolCallId

sent by Vapi in the initial request - "Y" should be a string containing your available times or booking confirmation According to [Vapi's webhook response requirements](https://docs.vapi.ai/tools-calling), the

result

field should be a string without line breaks, and if you're using JSON, it needs to be stringified first. ## 2. Verify the

toolCallId

Matching Make sure the

toolCallId

in your response exactly matches the one sent by Vapi. If there's a mismatch, Vapi won't be able to associate your response with the correct tool call. ## 3. Check Content-Type Header Ensure your webhook is setting the content-type header to

application/json

. ## 4. Format of Available Time Slots For available time slots, make sure they're formatted correctly. Here's an example of a properly formatted response:

json
{
    "results": [
        {
            "toolCallId": "wwXqTC5kZBqbBmInmrbS2I1T",
            "result": "I have some time slots available for Friday, January 31: \n\n  - 9:00 AM \n  - 12:30 PM \n  - 3:30 PM\n\nWhen would you like to book?"
        }
    ]
}

## 5. Check for Timezone Issues

checking if this is resolved/solved for you?

Hey @OgagaPengist , issue 1: could you share your webhook response format please? Issue 2: Did you create a tool to check the not available times of the connected calendar so the assistant is aware of these?

Yes @Sven the tool webhook works

This issue is likely arises from incorrect webhook response formatting, missing data mappings, or a misconfigured assistant prompt, try check the JSON response from Make.com, ensure it’s correctly formatted, and aligning it with Vapi expectations to resolve the discrepancy.

I had toolcallerid instead of toolcallid... Is solved

Marking this ticket as Solved ✅