Integrating Nest with Home Assistant (OAuth Consent Screen blocked )

[nicholbm]

I'm trying to integrate Nest devices with Home Assistant using OAuth credentials from my Google Cloud project. I keep getting the following error:

"Access blocked: home-assistant.io has not completed the Google verification process. Error 403: access_denied."

I've already confirmed:
- IAM roles (Owner, Editor, Service Management Admin) assigned correctly.
- Smart Device Management API and HomeGraph API are enabled.
- OAuth Consent Screen configured as External with authorized redirect URI "https://my.home-assistant.io/redirect/oauth".
- Tried incognito and multiple browsers.

Can anyone advise how to resolve this issue or bypass the verification block for personal integrations?

[virnab]

Hi nicholbm,

Thanks for reaching out to our community.

I'm sorry to hear you're encountering an error message that prevents you from integrating your Nest devices with Home Assistant using OAuth credentials from your Google Cloud project. It’s my pleasure to assist you with this concern.

Based on the information you provided me, I recommend you to contact our Google Cloud support team through the phone number (US) 1-877-355-5787 or (International) 1-646-257-4500. You can also find assistance through this Google Cloud help center article: Google Cloud support information.

If you need further assistance with your Google Nest products, please feel free to contact us whenever you need it.

Best regards,

Virna