Remove This Application Was Created By A Google Apps Script User -

If the warning persists after 48 hours, try:

Choose user type if you are publishing to the public web.

In your GCP console:

As suggested by users on Reddit , you can install uBlock Origin and create a custom filter.

By default, Apps Script uses a hidden default GCP project. You need to create your own. If the warning persists after 48 hours, try:

The warning's behavior depends heavily on the type of Google account involved. The following table outlines who sees what under different conditions.

Configure your OAuth consent screen details and add your privacy policy. You need to create your own

Once approved, you will never see that grey warning banner again.

Create a dedicated cloud project within the Google Cloud Console. Configure your OAuth consent screen details and add

A well‑known workaround is to on a page you control. This effectively hides the warning banner because the banner is part of the outer Google frame, and iframe restrictions prevent it from being displayed.