Vector store search in Azure OpenAI service returns "Resource not found"

Question

Vector store search in Azure OpenAI service returns "Resource not found"

Elier Delgado 20

Hello, I was able to create / upload files, create a vector store, etc. "inside" the Azure OpenAI Resource. However, I cannot make the search work. I'm wondering what I might be doing wrong?

I'm able to GET the vector store resource as shown below, so it exists, therefor the 404 Resource not found on the /search make no sense. The search always returns: 404 Resource Not found.

## Get vector store
GET https://abc123.openai.azure.com/openai/vector_stores/vs_abc123?api-version=2025-03-01-preview
Authorization: Bearer {{$OPENAI_API_KEY}}

## Search vector store returns 404 Resource Not Found
POST https://abc123.openai.azure.com/openai/vector_stores/vs_abc123/search?api-version=2025-03-01-preview
Authorization: Bearer {{$OPENAI_API_KEY}}
Content-Type: application/json
OpenAI-Beta: assistants=v2

{
    "query": "do something"
}

Here is the documentation:
https://learn.microsoft.com/en-us/azure/ai-services/openai/reference-preview#search-vector-store

Can someone confirms if that works?

FYI: it works just fine in api.openai.com

kothapally Snigdha 3,020 Reputation points Microsoft External Staff Moderator

2025-04-04T07:40:16.17+00:00
Hi Elier Delgado

I understand that you're experiencing an issue with "Resource not found

Ensure that the endpoint you are using in your search request matches the one you used to successfully retrieve the vector store.

make sure that the vector_store_id in your search request is correct and matches the one you used when you created the vector store.

Make sure that the authorization token you are using is valid and has the necessary permissions to perform the search operation.

Ensure that the request body for the search operation is correctly formatted as JSON. The query should be a valid string or array.

Confirm that you are using the correct API version in your request URL, which should be api-version=2025-03-01-preview.

I hope these helps you. Thank you!
Elier Delgado 20 Reputation points

2025-04-04T14:26:37.1033333+00:00

Hi Kothapally, I was careful to ensure that nothing was wrong on my end. As I mentioned, the same works perfectly on api.openai.com. All your suggestions are okay, so I don't think the problem is on my side. Here are a few posible explanations:

a) The error is something else, but it is returning Resource not found, which is confusing cause the resource exists (the GET works)

b) The documentation doesn't reflect the implementation, so the resource "search" doesn't exists, but the documentation saids so.

c) The vector store is not intended to be used as in OpenAI, but the documentation doesn't say so. Actually, the documentation is scattered, and suggest to use rather AI Search, but I need to use the vector store for now. I'm expecting a similar behavior in both OpenAI and Azure OpenAI.

I hope someone can clarify the situation.
JAYA SHANKAR G S 4,035 Reputation points Microsoft External Staff Moderator

2025-04-10T04:28:35.1+00:00

Hi @Elier Delgado ,

I can able to reproduce the issue from my end, checking with internal team, will update you once we get the details.

Thank you

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kothapally Snigdha 3,020 Reputation points Microsoft External Staff Moderator

2025-04-04T07:40:16.17+00:00

Hi Elier Delgado

I understand that you're experiencing an issue with "Resource not found

Ensure that the endpoint you are using in your search request matches the one you used to successfully retrieve the vector store.

make sure that the vector_store_id in your search request is correct and matches the one you used when you created the vector store.

Make sure that the authorization token you are using is valid and has the necessary permissions to perform the search operation.

Ensure that the request body for the search operation is correctly formatted as JSON. The query should be a valid string or array.

Confirm that you are using the correct API version in your request URL, which should be api-version=2025-03-01-preview.

I hope these helps you. Thank you!
Elier Delgado 20 Reputation points

2025-04-04T14:26:37.1033333+00:00

Hi Kothapally, I was careful to ensure that nothing was wrong on my end. As I mentioned, the same works perfectly on api.openai.com. All your suggestions are okay, so I don't think the problem is on my side. Here are a few posible explanations:

a) The error is something else, but it is returning Resource not found, which is confusing cause the resource exists (the GET works)

b) The documentation doesn't reflect the implementation, so the resource "search" doesn't exists, but the documentation saids so.

c) The vector store is not intended to be used as in OpenAI, but the documentation doesn't say so. Actually, the documentation is scattered, and suggest to use rather AI Search, but I need to use the vector store for now. I'm expecting a similar behavior in both OpenAI and Azure OpenAI.

I hope someone can clarify the situation.
JAYA SHANKAR G S 4,035 Reputation points Microsoft External Staff Moderator

2025-04-10T04:28:35.1+00:00

Hi @Elier Delgado ,

I can able to reproduce the issue from my end, checking with internal team, will update you once we get the details.

Thank you

Answer 1

JAYA SHANKAR G S 4,035 Microsoft External Staff Moderator

Hello @Elier Delgado ,

Got updates from product team, the /search endpoint is not currently supported. However, it is on the roadmap and expected to add support.

We’ll continue to monitor the rollout and will notify you as soon as the endpoint becomes available.

Thank you

Elier Delgado 20 Reputation points

2025-04-22T13:27:13.31+00:00

Thanks for the update, much appreciated.
CuriousDeveloper 0 Reputation points

2025-05-18T00:32:16.7066667+00:00

Any timeline on when /search will roll out?
JAYA SHANKAR G S 4,035 Reputation points Microsoft External Staff Moderator

2025-05-19T10:46:21.84+00:00

@CuriousDeveloper As of now there is not ETA for this, but it is on the roadmap and expected to add support.

Thank you
CuriousDeveloper 0 Reputation points

2025-06-18T03:36:08.8033333+00:00

@JAYA SHANKAR G S Just wanted to check in if there has been any movement on this over the last month, and if there is any indication of when this will be available. Thank you.

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Vector store search in Azure OpenAI service returns "Resource not found"

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