Help Needed: VAPI Assistant + Make Automation Issue

Hi everyone,

I’m building a VAPI assistant and have also set up automation in Make. Everything works fine in Make—scenarios run successfully—but when I call VAPI to check appointment availability, the tools response doesn’t return anything.

Here’s what I’ve done so far:

Created VAPI assistant for scheduling.
Made Make scenario to handle booking and availability.
Set up time, calendar, and timezone variables.
Make scenario runs successfully, but VAPI doesn’t return expected results in the webhook.

I’ve tried sending all required parameters (service, name, email, time) in JSON, but still no tools response.

Does anyone know why VAPI might not be returning the tools response even though Make scenario executes without errors? Any tips or similar experiences would be really appreciated.

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