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n8n - 💡(How to fix) Fix Adding OPENAI API Key Error: Couldn’t connect with these settings More details

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Error Message

Describe the problem/error/question

I have created and added an OpenAI API Key to n8n OpenAI node. I have a balance in OpenAI wallet. I am running n8n off the cloud server on latest version and I am still running into the error. It won't connect, thus resulting in no models shown on dropdown.

What is the error message (if any)?

  • error: all

Code Example

(Select the nodes on your canvas and use the keyboard shortcuts CMD+C/CTRL+C and CMD+V/CTRL+V to copy and paste the workflow.)
⚠️ WARNING ⚠️ If you have sensitive data in your workflow (like API keys), please remove it before sharing.
RAW_BUFFERClick to expand / collapse
<!-- Please follow the template below. Skip the questions that are not relevant to you. -->

Describe the problem/error/question

I have created and added an OpenAI API Key to n8n OpenAI node. I have a balance in OpenAI wallet. I am running n8n off the cloud server on latest version and I am still running into the error. It won't connect, thus resulting in no models shown on dropdown.

What is the error message (if any)?

Couldn’t connect with these settings More [details]

Please share your workflow/screenshots/recording

<img width="1194" height="692" alt="Image" src="https://github.com/user-attachments/assets/b64f20eb-9e49-4ba3-98b4-2eeded1e907e" /> <img width="1845" height="800" alt="Image" src="https://github.com/user-attachments/assets/a0fede6e-8be8-4738-974e-b4f667a74fab" /> <img width="1233" height="584" alt="Image" src="https://github.com/user-attachments/assets/795de31a-0bb1-497d-8eaf-48b57f53f9a9" /> 
(Select the nodes on your canvas and use the keyboard shortcuts CMD+C/CTRL+C and CMD+V/CTRL+V to copy and paste the workflow.)
⚠️ WARNING ⚠️ If you have sensitive data in your workflow (like API keys), please remove it before sharing.

Share the output returned by the last node

<!-- If you need help with data transformations, please also share your expected output. -->

Debug info

core

  • n8nVersion: 2.19.5
  • platform: docker (cloud)
  • nodeJsVersion: 24.14.1
  • nodeEnv: production
  • database: sqlite
  • executionMode: regular
  • concurrency: 5
  • license: enterprise (sandbox)

storage

  • success: all
  • error: all
  • progress: false
  • manual: true
  • binaryMode: filesystem

pruning

  • enabled: true
  • maxAge: 168 hours
  • maxCount: 2500 executions

client

  • userAgent: mozilla/5.0 (macintosh; intel mac os x 10_15_7) applewebkit/537.36 (khtml, like gecko) chrome/148.0.0.0 safari/537.36
  • isTouchDevice: false

Generated at: 2026-05-12T04:56:56.303Z

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#api#orchestration issue#cache issue#memory leak#API versioning

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