For Earwig's Copyvio Detector, we rely on WMF-provided access to the Google Custom Search JSON API as a critical component in running copyvio checks. Their overview page now has the following warning:

Note: The Custom Search JSON API is closed to new customers. Vertex AI Search is a favorable alternative for searching up to 50 domains. Alternatively, if your use case necessitates full web search, contact us to express your interest in and get more information about our full web search solution.

Existing Custom Search JSON API customers have until January 1, 2027 to transition to an alternative solution.

Vertex is pretty clearly not what we want. I assume we need more information about this "full web search solution"?