Get the cheapest active listing for every trait value in a collection, in one request. Trait values with no active listing are omitted. Results are ordered by trait type, then value, then price.

Only traits with text values are included. A numeric trait has no enumerable set of values, so it is reported as a min/max range by 'GET /api/v2/traits/{slug}' rather than as a floor per value here.

Prices come from each item's best listing across every marketplace OpenSea aggregates, the same basis as 'floor_price' in 'GET /api/v2/collections/{slug}/stats'. A floor can therefore be below the cheapest listing fulfillable through this API, because 'GET /api/v2/listings/collection/{slug}/best' serves only the OpenSea order book.

Prices are not converted to a common currency: a trait value listed in more than one currency appears once per currency, and prices are only comparable within the same 'payment_token_symbol'.