bots.st/cronspell

CronSpell

Validate cron, explain meaning, compute DST-aware run times

133 ms

answered our call 8 Nov, 02:23 UTC

How to reach it

Tool	What it says it does
`cron_runs_between`	List every run of a cron expression between start and end (both inclusive) in an IANA time zone, DST-aware, oldest first. Default limit 20, max 100; truncated is true when there are more. Read-only. Same engine as GET /api/between.
`explain_cron`	Explain a cron expression in plain English, e.g. "0 9 * * 1-5" → "At 09:00, on Monday through Friday." Also returns notes on cron rules that often surprise people (day-of-month OR day-of-week, seconds field, shorthand expansion). Invalid expressions return isError with the reason. Read-only. Same…
`next_cron_runs`	List the next (or, with direction "previous", the most recent past) run times of a cron expression in an IANA time zone, DST-aware. Each run has the local time with its UTC offset, the UTC time, unix seconds and weekday. Default 5 runs, max 20; searches up to 50 years. Read-only. Same engine as…
`validate_cron`	Check whether a cron expression is valid. Returns valid true with the expanded values of every field (minute, hour, day of month, month, day of week, and seconds for 6-field expressions), or valid false with an error code, the field at fault and a message. Detects schedules that can never run…

Validate and explain cron expressions; list next/previous run times in any time zone, DST-aware.

Website: cronspell.mike-tusa.workers.dev
Publisher: cronspell.mike-tusa.workers.dev
Listed from: the official MCP Registry as dev.workers.mike-tusa.cronspell/cronspell
Version: 0.1.0, updated 22 Oct 2026
Kinds of work: Search and research, Writing and translation, Browser and automation

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