Get your Google Custom Search API credentials in 3 simple steps
* (asterisk for all sites)Once you have both credentials, enter them in the API Configuration section on the main page. They'll be saved in your browser's local storage.
Make sure you've enabled the Custom Search API in your Google Cloud project and that you're using the correct API key.
Verify that your Custom Search Engine is configured to search * (all sites) and that both credentials are entered correctly.
The free tier provides 100 searches/day. If you need more, you can upgrade to a paid plan in Google Cloud Console.