Issues with Unrecognized Assistant ID in OpenAI Assistants API (v2)

API
1

Hey everyone,

I’m working on integrating a custom Assistant using the OpenAI Assistants API (v2), but I’ve hit a snag. No matter what I try, it seems like the Assistant ID isn’t being recognized when I make API requests.

What’s Happening:

  1. Assistant ID Not Being Recognized:

• When I send a message to my custom Assistant using the Assistant ID, I keep getting this error:

{
“error”: {
“message”: “Invalid URL (POST /v1/assistants/{assistant_id}/messages)”,
“type”: “invalid_request_error”,
“param”: null,
“code”: null
}
}

• This makes me think the API isn’t recognizing the Assistant ID, even though I’ve double-checked it.

  1. Tried Both V1 and V2 Endpoints:

• I’ve tried the API with both v1 and v2 endpoints:

• POST /v1/assistants/{assistant_id}/messages

• POST /v2/assistants/{assistant_id}/messages

• The error keeps coming up, even though I can pull the Assistant details using a GET request without any issues.

Code I’m Using:

Here’s a snippet of the Python code I’m working with:

import requests

My API Key and Assistant ID

api_key = “YOUR_API_KEY”
assistant_id = “asst_YOUR_ASSISTANT_ID”

The endpoint I’m hitting

url = f"https ://api.openai.com/v2/assistants/{assistant_id}/messages"

Headers for the request

headers = {
“Authorization”: f"Bearer {api_key}",
“Content-Type”: “application/json”,
“OpenAI-Beta”: “assistants=v2”
}

The payload I’m sending

data = {
“messages”: [
{
“role”: “user”,
“content”: “Hello Leia, can you help?”
}
]
}

Sending the request

response = requests.post(url, headers=headers, json=data)

Outputting the response

print(response.json())

What I’ve Tried:

  1. Checked API Key and Assistant ID:

• Both seem fine. I can get Assistant details with a GET request, so I know the ID is correct.

  1. Different Endpoints:

• I’ve tried both v1 and v2 endpoints, but no luck.

  1. Updated to Match Latest API Docs:

• Added the OpenAI-Beta: assistants=v2 header as suggested, but still hitting the same issue.

Looking for Help:

Has anyone else run into this problem? Is there something I’m missing about how to properly link the Assistant ID in these requests? Any tips or guidance would be really appreciated!

Thanks in advance for your help!