VAPI•3mo ago

Authentication Failure When Using Tool Integration

Hi 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

Vapi Support BotAPP•10/14/25, 4:47 AM

Thank 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

⤵️ Mention @Vapi Support Bot for follow-ups 🐥

specific-silverOP•10/14/25, 5:43 AM

API key

specific-silverOP•10/15/25, 5:36 AM

Hi, any updates on this?

comprehensive-tomato•10/15/25, 7:41 PM

Does the vapi API key match what's in the connected tool?

specific-silverOP•10/15/25, 8:57 PM

Yes it does, is anyone available for live support, we've done evrything cannot figure it out

VapiAPP•10/16/25, 2:51 AM

If 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.

specific-silverOP•10/16/25, 3:56 AM

Yes I can

specific-silverOP•10/16/25, 4:01 AM

call-logs-2025-10-16T04-00-57-093Z.csv2.13MB

specific-silverOP•10/16/25, 4:01 AM

This is a call log, where I try to book in a meeting, but immediately it has problems with get contact

specific-silverOP•10/17/25, 7:04 PM

any updates?

VapiAPP•10/17/25, 11:47 PM

You 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

Authentication Failure When Using Tool Integration

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