Broken for new users

[JustTemmie]

Message from google:

Note: As of 2023-10-05, new customers attempting to make requests to the Custom Search Site Restricted JSON API will receive a 403 error message response. This does not affect existing customers or our other API products. For additional information, please see the blog post.

We encourage all site search partners - prospective and existing - to explore Google Cloud's Vertex AI Search for their site search needs. You can find transition guidance here.

this means that new accounts will not be able to use this project :p

[E-B3rry]

Same issue there. By the way, the whole service will die by 18th December 2024.
Source: https://developers.google.com/custom-search/v1/site_restricted_api

Note: The Custom Search Site Restricted JSON API endpoints will cease to serve traffic on December 18, 2024.
All Custom Search Site Restricted JSON API customers must begin their transition to Google Cloud's Vertex AI Search. Detailed transition guidance can be found here. If you experience issues, you can contact us here.