include.aioverview — no separate API call. For use cases, pricing context, and copy-paste examples, see the Google AI Overview API page on the product site.

AI Overview in Google Search
When Google shows no AI Overview, including in a country where Google doesn’t offer one, the response is a 200 with no
aioverview key and the rest of the search data intact. That case is not retried, and the AI Overview add-on is still charged. Call the /v1/countries endpoint with model=aioverview for the countries where AI Overview is available.Example request
include.aioverview: true and include.aioverview: {} return the AI Overview without markdown. Send {"markdown": true}, as above, to get result.aioverview.markdown.
AI Overview requests are geo-targeted the same way as any Google Search request. Pass country and, when you need city- or state-level precision, a single location string in Google’s canonical format (for example Olympia,Washington,United States). There are no separate city or state parameters. See city and state-level geo-targeting.