cron-schedule-audit-mcp
Validates cron expressions and computes correct next-fire times using the real IANA timezone database — catches the specific DST footgun that silently skips a scheduled job every spring or fires it twice every fall, plus the day-of-month/day-of-week OR-not-AND surprise almost everyone hits once.
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Deploys three tools built on the platform's real IANA timezone database rather than a hand-rolled fake-UTC-offset table: validate_cron_expression parses and validates standard cron syntax including the day-of-month/day-of-week OR-not-AND quirk that trips up most implementations; get_next_fire_times computes the actual next N fire times across a DST transition, not just naive offset math; detect_dst_risk flags schedules that land inside a spring-forward gap (never fires) or a fall-back overlap (fires twice) for a given year and timezone. Verified against real 2026/2027 US transition dates during testing. Free tier included, no API key required.