in
The Google Reviews endpoint of Business Data API gives an opportunity to collect reviews that appear in the “Reviews” feature of Google SERP.
By using the Google Reviews endpoint you can obtain all reviews for a business entity in a single request. Your account will be billed for every ten or twenty reviews returned in the results, depending on the endpoint.
Learn more
See docs
*in the Google Extended Reviews endpoint, you can use several parameters to specify a business establishment, which impact the cost of review data:
keyword – add $0.0015 to the cost for every 20 reviews;
place_id – add $0.00075 to the cost for every 20 reviews;
cid – add $0.00075 to the cost for every 20 reviews.