Issue with Setting Up Outbound Calls on Make.com Using VAPI - Getting 400 Bad Request Error

Hi everyone,

I am currently trying to set up outbound calls using VAPI on Make.com by following the video tutorial: Outbound Calls to Lead Lists. However, I am encountering a 400 Bad Request error after setting everything up.

Here’s what I’ve done so far:

Added the correct Assistant ID and Phone Number ID.
Created the VAPI connection in Make.com using the API key.
Configured all necessary parameters as shown in the tutorial.

Despite this, I’m still getting the 400 Bad Request error when trying to run the workflow, and the call is not being created. I’ve attached the screenshots for better context so you can review and help me identify where the issue might be.

Can anyone please help me troubleshoot this or point out any mistakes I might have made?

Thanks in advance for your help!

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