403 PERMISSION_DENIED — Your project has been denied access

Hello Gemini API team,

I am requesting a review of an unexpected project-level access restriction.

Project name: My Project 1
Project ID: my-project-1-5023..
Account type: Personal Google account
Billing: Free tier, no Cloud Billing account attached

Exact error:
403 PERMISSION_DENIED
Your project has been denied access. Please contact support.

Observed behavior:

  • Google AI Studio Playground works normally.
  • Gemini API requests fail in both Cline and OpenCode.
  • AI Studio shows the project’s billing tier as “Unavailable”.
  • No warning or appeal banner appears in Google Cloud Console.
  • Cloud Billing Support is unavailable because I do not have a billing account.

The API key has not been shared publicly and is used only for personal development testing.

Could a Google team member please review whether this project or account was incorrectly flagged?