Can't make outbound call work

Questions
1

Describe the problem/error/question

Hello.
I’m trying to create a simple workflow where a VAPI AI calls a telefone number that’s in a google spreadsheet. I have already configured a number on Twilio and everythinh looks right. Actually, it works sometimes and then it stops working. I’m afraid it has something to do with a bad IP or whatever, but I can’t find the error.
The HTTP node make call fails and gives a bad request 400 error.

What is the error message (if any)?

Please share your workflow

Share the output returned by the last node

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Information on your n8n setup

  • n8n version:
  • Database (default: SQLite):
  • n8n EXECUTIONS_PROCESS setting (default: own, main):
  • Running n8n via (Docker, npm, n8n cloud, desktop app): n8n cloud
  • Operating system:
2

hello @Davi_Bastos

Check what’s inside your Telefone variable when the node fails.

3

It has the correct number and it even calls it (I’m testing with my own phone number). I even answer it and the VAPI AI starts. But the flow fails immediately on Make call.

4

Additionally, the first half hour I tested it it was working, then suddenly it started showing the error.

5

What’s inside the “From HTTP Request” section of the error?

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