All Gemini API projects show "Quota Tier Unavailable" and return PERMISSION_DENIED

Gemini API
1

Hello Google AI Team,

I’m experiencing an issue with Gemini API access.

Account details:

  • Personal Gmail account (not a Workspace account)
  • Located in a supported region
  • No previous Gemini API usage
  • No policy violations that I am aware of

Problem:
All newly created Gemini API projects show:

“Quota Tier: Unavailable”

When calling the API, every project returns:

{
“error”: {
“code”: 403,
“message”: “Your project has been denied access. Please contact support.”,
“status”: “PERMISSION_DENIED”
}
}

Additional information:

  • Multiple projects have been created and all exhibit the same behavior.
  • API keys are generated successfully.
  • Projects appear normally in AI Studio.
  • The issue affects every newly created project.
  • I have never successfully used Gemini API on this account.

Could you please check whether my account or projects have been incorrectly restricted, and advise how I can regain access to Gemini API Free Tier?

Thank you for your help.