Issue with Webhook and Retell AI - LLM does not receive output from Make.com

[JanGoMak]

What are you trying to achieve?

Hi there, I have been battling with this issue for a few days now and need your help.
I am a newbie and start to get my head around Make and Retell AI inbound agent.

I created a Retell inbound agent that checks an Airtable base for properties.
The results are filtered by the parameters from the Retell call via JSON Payload.

{
“additional_properties”: false,
“type”: “object”,
“properties”: {
“bedrooms”: {
“type”: “integer”,
“description”: “The number of bedrooms in the property.”
},
“location”: {
“type”: “string”,
“description”: “The location of the property.”
},
“price”: {
“type”: “number”,
“description”: “The price of the property.”
},
“status”: {
“type”: “string”,
“description”: “The status of the property.”
}
},
“required”: [
“location”,
“status”,
“price”,
“bedrooms”
]
}

All seems to work and the output is correct as well on make.com.
However, the Retell LLM does not receive the output and can’t return the available property.

What am I doing wrong?
Any help is highly appreciated.

Warm regards,

Jan

Steps taken so far

I connected Make and Retell AI through web hook, transmit the JSON payload with requirements and filter values.
Set up the filter and Text aggregator and get all relevant information on Make.com

Screenshots: scenario setup, module configuration, errors

[arbi]

create a webhook response that is what i did and i was able to get response to LLM

[JanGoMak]

Hi arbi,

Thank you very much for replying.
However, I created a web hook response already.

I thought I had uploaded a screengrab of my flow. in the original post.
Do you have any other ideas or solutions?

Warm regards

Jan

[DavidGurr_Make]

What are the field values in your Webhook Response module?

If I’m right (I’ve not checked) this should be:

Status - 200

Body

{
    "result": "{8.text}}"
}

Custom headers

Key: content-type
Value: application/json

[Shah]

Also Define in the prompt that this webhook result is equals to this {{variable }} to be used by ai to answer

[JanGoMak]

Hi DavidGurr,

Thank you very much for your help - It seemed to have fixed my issue.
I somehow completely forgot to include the ‘result’.

I updated my web hook and it is working like a charm.

Hi Shah,

Thanks for your comment.
I included the variable in my prompt as well.

Now I can iron out a few more things but at least I get a result.

Warm regards,

Jan