curl "https://www.searchapi.io/api/v1/search?engine=google_flights_calendar&departure_id=sample_google_flights_calendar_departure_id&arrival_id=sample_google_flights_calendar_arrival_id&outbound_date=2026-09-01&api_key=E5oa7LbhkKN7YUyj4CwXppK8"Only required parameters and parameters you set are sent — the request never repeats the API's own defaults back at it.