ElevenLabs Node: 401 Error on Execute Despite Successful Test and Valid Key

Questions
1

Hello n8n Team,

I am experiencing a bug with the ElevenLabs node on the n8n Cloud platform.

The Problem:
The “Convert text to speech” operation fails with a 401 Authorization failed error.

Contradictory Evidence:

  1. The credential test in the “Edit ElevenLabs account” window shows “Connection tested successfully”.
  2. I have confirmed my API key is valid by making a direct API call using cURL, which worked perfectly and generated an audio file.

Troubleshooting Steps Taken:

  • I am on the latest n8n Cloud version.
  • I have confirmed my ElevenLabs account has plenty of character quota remaining.
  • I have tested with both custom voices and standard voices (e.g., “Rachel”).
  • I have tested with both dynamic and simple hardcoded text (e.g., “Hello world”).
  • I have regenerated my API key multiple times.

The error persists despite all of these steps. Since the curl test works, the bug appears to be within the n8n node’s execution logic.

Could you please investigate this issue?

Thank you!

1 Like
2

Yo! same issue. looking forward to a fix from someone!

3

I got the same issue

4

issue is still happening please support fix this!

5

Observe the same problem. Please fix this

6

I had this issue, it was because eleven labs had flagged my free account (I wasn’t abusing it, but must be sensitive) when i moved to creator plan the issue went away. hope that helps : )

7

Update / Solution:

I found the cause of the issue. The ElevenLabs node on n8n will return a 401 Unauthorized error if you’re on a free ElevenLabs account. The node starts working normally as soon as you upgrade to a paid plan.

It would be really helpful if the node showed a clearer error message, or if this limitation were documented somewhere in the ElevenLabs node docs, right now it can be quite confusing, since the credentials test passes and the API key works directly via curl.

Hopefully this saves others some debugging time :nerd_face: !

3 Likes
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