{"currency":"ETH","preview":true,"note":"Next 2 expiries only. Paid endpoint returns next 8 expiries tagged weekly/monthly/quarterly, Ed25519 signed. Data cached — may be up to 60 minutes old.","next":{"date":"2026-07-18","timestamp":1784361600,"weekday":"Saturday","days_away":1,"type":"weekly"},"upcoming":[{"date":"2026-07-18","timestamp":1784361600,"weekday":"Saturday","days_away":1,"type":"weekly"},{"date":"2026-07-19","timestamp":1784448000,"weekday":"Sunday","days_away":2,"type":"weekly"}],"fetched_at":"2026-07-17T23:33:19.328839+00:00","preview_cached":true,"cache_max_age_minutes":60}