Authentication Failure When Using Tool Integration
# supportt
Tobias
10/14/2025, 4:47 AMHi Vapi Support,
I’m currently experiencing a recurring 401 API Error when attempting to make requests through one of my connected tools. The error message I’m seeing is:
Error: API Error: 401 Request failed with status code 401
I have tried all of the steps already listed in this support page, let me know what I can do.
Thank you for your help and support,
Tobias
v
Vapi Support Bot
10/14/2025, 4:47 AMThank you for providing details, Tobias. To help diagnose the recurring 401 API Error, could you please specify which authentication method you are using for the tool integration (e.g., API key, JWT token, OAuth, or custom header)? This will help us provide more targeted troubleshooting steps.
Source:
- [Custom tools troubleshooting](https://docs.vapi.ai/tools/custom-tools-troubleshooting)
t
Tobias
10/14/2025, 5:44 AMAPI key
Tobias
10/15/2025, 5:36 AMHi, any updates on this?
g
G - One
10/15/2025, 7:41 PMDoes the vapi API key match what's in the connected tool?
t
Tobias
10/15/2025, 8:57 PMYes it does, is anyone available for live support, we've done evrything cannot figure it out
c
Chiranjeet Mishra
10/16/2025, 2:51 AMIf this is happening in a call, could you please provide a call id where you experienced this issue? We would like to review the logs to identify the cause.
t
Tobias
10/16/2025, 3:56 AMYes I can
Tobias
10/16/2025, 4:01 AMThis is a call log, where I try to book in a meeting, but immediately it has problems with get contact
Tobias
10/17/2025, 7:04 PMany updates?
c
Chiranjeet Mishra
10/17/2025, 11:48 PMYou might want to also connect your GHL account to your workspace directly. If you just use the API key, it may not be as accurate