Problem in node ‘Create an assistant

[Ai_Department]

Describe the problem/error/question

I am building an n8n workflow that uses an openai node with operation create and assistant. I added the description, instructions, and credentials. But when I am executing the step I am getting this error “ Bad request - please check your parameters. You must provide the ‘OpenAI-Beta’ header to access the Assistants API. Please try again by setting the header ‘OpenAI-Beta: assistants=v2’“

Bad request - please check your parameters. You must provide the ‘OpenAI-Beta’ header to access the Assistants API. Please try again by setting the header 'OpenAI-Beta: assistants=v2

• n8n version: 1.113.2
• Running n8n via : cloud

[Naufal_Fayyadh]

Hello Ai_Department, i’ll try to help yaa!

I think that error comes from OpenAI, not n8n. The assistant API (/v2/assistants) is still in beta, and OpenAI requires a special header on every request:

OpenAI-Beta: assistants=v2

Maybe you can try this:

• Use HTTP Request node::
  • Method: POST
  • URL: https://api.openai.com/v1/assistants (or endpoint you need)
  • Headers:
    • Authorization: Bearer {{$credentials.openAiApi.apiKey}}
    • OpenAI-Beta: assistants=v2
  • Body: your assistant config (model, instructions, etc)
  • This is the only way to talk to the beta Assistants API from n8n today

I think n8n’s OpenAI node doesnt yet send OpenAI-Beta: assistants=v2. For now, switch to HTTP Request and set that header yourself.

Thats all i can share to you, hope this will be works!