# NVIDIA NIM API returns 403 Authorization failed while /v1/models works

**URL:** <https://forums.developer.nvidia.com/t/nvidia-nim-api-returns-403-authorization-failed-while-v1-models-works/385403>\
**Category:** Access/Accounts\
**Tags:** nemotron, nim\
**Created:** [October 9, 2026, 2:08am UTC](https://forums.developer.nvidia.com/t/nvidia-nim-api-returns-403-authorization-failed-while-v1-models-works/385403 "2026-10-09T02:08:56Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![ahmadrezaa710](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@ahmadrezaa710](https://forums.developer.nvidia.com/u/ahmadrezaa710)\
**Post date:** [October 9, 2026, 2:08am UTC](https://forums.developer.nvidia.com/t/nvidia-nim-api-returns-403-authorization-failed-while-v1-models-works/385403/1 "2026-10-09T02:08:57Z")

</div>

Hello NVIDIA Support,

I am using NVIDIA NIM with a personal NVIDIA Developer account.

- `GET https://integrate.api.nvidia.com/v1/models` returns HTTP 200.
- `POST https://integrate.api.nvidia.com/v1/chat/completions` consistently returns HTTP 403:  
`{"status":403,"title":"Forbidden","detail":"Authorization failed"}`

I tested directly from Windows PowerShell, outside my application, using the model `nvidia/nemotron-3.5-lightning-30b-a3b`. I also created a new API key, but the issue persists.

Could you please check whether my account has the required authorization for hosted NIM inference / Public API Endpoints?

Thank you.