{"currency":"BTC","spot":63946.64333333333,"total_contracts":56,"exchanges":{"deribit":{"count":12},"okx":{"count":6},"bybit":{"count":38}},"summary":{"spot":63946.64333333333,"regime":"CONTANGO","n_maturities":12,"near_expiry":"2026-07-24","near_carry_pct":2.7,"far_expiry":"2027-06-25","far_carry_pct":4.27,"carry_slope":1.57},"timestamp":"2026-07-18T00:18:18.701951+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}