How to fix endpoint URL returning {"error":{"code":"404","message": "Resource not found"}}

Question

How to fix endpoint URL returning {"error":{"code":"404","message": "Resource not found"}}

Inioluwa Olaposi 20

Hello Community,

I created an Azure OpenAI service recently, however, my endpoint URL https://lghai.openai.azure.com/ is returning a "{"error":{"code":"404","message": "Resource not found"}}"

{"error":{"code":"404","message": "Resource not found"}}

I am not sure if it an issue with my storage account or subscription. I would appreciate if I can receive more help on this. Similarly, using my API is returning 'Preview url https://lghai.openai.azure.com/openai/deployments/gpt-4o-mini/extensions/chat/completions?api-version=2024-02-15-preview not found' error on my website , so I believe it is an issue from the Azure OpenAI service itself.

Can you help please?

VSawhney 715 Microsoft External Staff Moderator

Hello Inioluwa Olaposi,

Could you please use the latest GA or preview available in the given documents.

API	Latest preview release	Latest GA release	Specifications	Description

Control plane	`2024-06-01-preview`	`2024-10-01`	Spec files	Azure OpenAI shares a common control plane with all other Azure AI Services. The control plane API is used for things like creating Azure OpenAI resources, model deployment, and other higher level resource management tasks. The control plane also governs what is possible to do with capabilities like Azure Resource Manager, Bicep, Terraform, and Azure CLI.
Data plane - authoring	`2025-02-01-preview`	`2024-10-21`	Spec files	The data plane authoring API controls fine-tuning, file-upload, ingestion jobs, batch and certain model level queries
Data plane - inference	`2025-02-01-preview`	`2024-10-21`	Spec files	The data plane inference API provides the inference capabilities/endpoints for features like completions, chat completions, embeddings, speech/whisper, on your data, Dall-e, assistants, etc.

Inference GA ref link: https://learn.microsoft.com/en-us/azure/ai-services/openai/reference#api-specs
Inference preview ref link: https://learn.microsoft.com/en-us/azure/ai-services/openai/reference-preview#api-specs

Inioluwa Olaposi 20 Reputation points

2025-03-19T10:50:59.64+00:00

Thank you. The subscription plan is Azure subscription 1.

ID: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxx

Parent Management group: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx

Kindly let me know if you need any other details.
VSawhney 715 Reputation points Microsoft External Staff Moderator

2025-03-19T11:01:53.2533333+00:00

Hello Inioluwa Olaposi,

Could you please try the latest API versions and try again as per the below documents.
Inference GA ref link: https://learn.microsoft.com/en-us/azure/ai-services/openai/reference#api-specs Inference preview ref link: https://learn.microsoft.com/en-us/azure/ai-services/openai/reference-preview#api-specs
Inioluwa Olaposi 20 Reputation points

2025-03-19T11:13:43.1433333+00:00

Can you demystify what is on these pages for me, VSawhney? The custom domain of every Azure Openai resource I create return 'Resource not found'. For example: https://lghai.openai.azure.com/. For LGHAI, I use gpt-4o-mini (version:2024-07-18). What are the latest API versions.
VSawhney 715 Reputation points Microsoft External Staff Moderator

2025-03-20T09:32:11.68+00:00

Hello Inioluwa Olaposi,

We checked on our end and we were able to repro the scenario without any issues. Please try clearing the browser cache and cookies, and try using a different browser, this might help you in getting desired result.
If you are still unable to access, please share the region you are using in the portal.

Thank you!
VSawhney 715 Reputation points Microsoft External Staff Moderator

2025-03-21T07:00:51.59+00:00

Hello Inioluwa Olaposi,

We wanted to know if the above solution helped you?
If the issue is unresolved even after trying the above steps, please provide the region you are using in the Azure portal.

Thank you!
VSawhney 715 Reputation points Microsoft External Staff Moderator

2025-03-24T01:46:28.11+00:00

Hello Inioluwa Olaposi,

Following up to check if the above solution helped you? If the issue is unresolved even after trying the above steps, please provide the region you are using in the Azure portal.
Please feel free to reach us if you have further queries.

Thank you!

1 answer

Your answer

VSawhney 715 Reputation points Microsoft External Staff Moderator

2025-03-19T10:37:24.2+00:00

Hello Inioluwa Olaposi,

Could you please use the latest GA or preview available in the given documents.

API Latest preview release Latest GA release Specifications Description

Control plane 2024-06-01-preview 2024-10-01 Spec files Azure OpenAI shares a common control plane with all other Azure AI Services. The control plane API is used for things like creating Azure OpenAI resources, model deployment, and other higher level resource management tasks. The control plane also governs what is possible to do with capabilities like Azure Resource Manager, Bicep, Terraform, and Azure CLI.

Data plane - authoring 2025-02-01-preview 2024-10-21 Spec files The data plane authoring API controls fine-tuning, file-upload, ingestion jobs, batch and certain model level queries

Data plane - inference 2025-02-01-preview 2024-10-21 Spec files The data plane inference API provides the inference capabilities/endpoints for features like completions, chat completions, embeddings, speech/whisper, on your data, Dall-e, assistants, etc.

Inference GA ref link: https://learn.microsoft.com/en-us/azure/ai-services/openai/reference#api-specs
Inference preview ref link: https://learn.microsoft.com/en-us/azure/ai-services/openai/reference-preview#api-specs
Inioluwa Olaposi 20 Reputation points

2025-03-19T10:50:59.64+00:00

Thank you. The subscription plan is Azure subscription 1.

ID: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxx

Parent Management group: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx

Kindly let me know if you need any other details.
VSawhney 715 Reputation points Microsoft External Staff Moderator

2025-03-19T11:01:53.2533333+00:00

Hello Inioluwa Olaposi,

Could you please try the latest API versions and try again as per the below documents.
Inference GA ref link: https://learn.microsoft.com/en-us/azure/ai-services/openai/reference#api-specs Inference preview ref link: https://learn.microsoft.com/en-us/azure/ai-services/openai/reference-preview#api-specs
Inioluwa Olaposi 20 Reputation points

2025-03-19T11:13:43.1433333+00:00

Can you demystify what is on these pages for me, VSawhney? The custom domain of every Azure Openai resource I create return 'Resource not found'. For example: https://lghai.openai.azure.com/. For LGHAI, I use gpt-4o-mini (version:2024-07-18). What are the latest API versions.
VSawhney 715 Reputation points Microsoft External Staff Moderator

2025-03-20T09:32:11.68+00:00

Hello Inioluwa Olaposi,

We checked on our end and we were able to repro the scenario without any issues. Please try clearing the browser cache and cookies, and try using a different browser, this might help you in getting desired result.
If you are still unable to access, please share the region you are using in the portal.

Thank you!
VSawhney 715 Reputation points Microsoft External Staff Moderator

2025-03-21T07:00:51.59+00:00

Hello Inioluwa Olaposi,

We wanted to know if the above solution helped you?
If the issue is unresolved even after trying the above steps, please provide the region you are using in the Azure portal.

Thank you!
VSawhney 715 Reputation points Microsoft External Staff Moderator

2025-03-24T01:46:28.11+00:00

Hello Inioluwa Olaposi,

Following up to check if the above solution helped you? If the issue is unresolved even after trying the above steps, please provide the region you are using in the Azure portal.
Please feel free to reach us if you have further queries.

Thank you!

Answer 1

Make sure your Deployment Name (gpt-4o-mini) is the same as your configured deployment in Azure.
Check if You Are Using the Correct API Key. Go to Azure OpenAI Service > Keys and Endpoint and copy the correct API Key and update your requests.

Try accessing the endpoint via Postman or CURL:

curl -X POST "https://lghai.openai.azure.com/openai/deployments/gpt-4o-mini/chat/completions?api-version=2024-02-15-preview" \

-H "Content-Type: application/json" \

-H "api-key: YOUR_API_KEY" \

-d '{ "messages": [{"role": "system", "content": "Hello"}] }'

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How to fix endpoint URL returning {"error":{"code":"404","message": "Resource not found"}}

1 answer

Your answer