Validate a 5-field cron expression (lists, ranges, steps, JAN-DEC/SUN-SAT names, @daily/@hourly macros) and return its next 1-20 run times in any IANA time zone (DST-aware), as local ISO, UTC ISO and epoch seconds. Deterministic, no network.
| Network | Scheme | Amount | Pay To |
|---|---|---|---|
| Base | exact | $0.003100 USDC | 0xc22f...Ef69 |