SERPens measures what Google actually shows

Field notes

The API returns structured result blocks that many search integrations normally have to reconstruct: organic listings, cited AI Overview sources, People Also Ask, related searches, knowledge graphs, sitelinks, and pagination. The public measurement layer runs 4,170 US queries each week, plus a 300-query sample across nine other countries, then publishes feature frequencies and topic comparisons. The extract reports one week of aggregates, so the dataset is useful as a snapshot rather than established trend history.