{"currency":"ETH","spot":1639.68,"total_contracts":57,"exchanges":{"deribit":{"count":12},"okx":{"count":6},"bybit":{"count":39}},"summary":{"spot":1639.68,"regime":"CONTANGO","n_maturities":12,"near_expiry":"2026-06-19","near_carry_pct":9.78,"far_expiry":"2027-03-26","far_carry_pct":3.31,"carry_slope":-6.47},"timestamp":"2026-06-11T16:48:00.594875+00:00","preview":true,"signed":false,"note":"Preview only. Paid endpoint returns full per-expiry curve with per-exchange breakdown."}