{"currency":"BTC","spot":64671.56333333333,"total_contracts":56,"exchanges":{"deribit":{"count":12},"okx":{"count":8},"bybit":{"count":36}},"summary":{"spot":64671.56333333333,"regime":"CONTANGO","n_maturities":13,"near_expiry":"2026-08-07","near_carry_pct":3.9,"far_expiry":"2027-09-24","far_carry_pct":4.4,"carry_slope":0.5},"timestamp":"2026-07-26T18:48:27.489702+00:00","preview":true,"signed":false,"note":"Preview only. Paid endpoint returns full per-expiry curve with per-exchange breakdown. Data cached — may be up to 60 minutes old.","preview_cached":true,"cache_max_age_minutes":60}