Free of charge. Mirrors metadata.list_unit_prices. Prices are US dollars
per gibibyte (2^30 bytes), per feed mode and schema, not per decimal
gigabyte. Measured on 2026-09-12, a quote equals
db_get_billable_size() / 2^30 * unit_price to six decimal places, so
dividing by 1e9 instead overstates the cost by about 7%.
Value
A tibble with mode, schema and unit_price. When the server
answers with a shape this function does not recognise, the parsed JSON is
returned unchanged and a warning is raised.
