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Grokzilla Cron Expression Validator & Next-Run Scheduler
x402
Grokzilla Cron Expression Validator & Next-Run Scheduler is a paid API for AI agents from grokzilla.shop, paid per call via x402, $0.0031/call, status unknown (last checked 2026-10-18).
Validates a cron expression and returns its next 1–20 scheduled run times in any IANA time zone, with DST-aware local ISO, UTC ISO, and epoch seconds outputs.
Price / call$0.0031
Success—
StatusUnknown
How this service works
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.
Output
Returns a structured response containing: validation status of the cron expression, and for valid expressions a list of up to 20 next scheduled run times each expressed as a local ISO 8601 datetime (in the requested IANA time zone), a UTC ISO 8601 datetime, and a Unix epoch seconds integer.
Example use cases
Verify CI/CD pipeline schedule
“I have a CI job scheduled with the cron expression '0 2 * * *' — can you confirm it's valid and tell me the next 7 times it will run in UTC?”
Debug DST-affected cron job
“My cron '30 1 * * SUN' keeps running at weird times — can you show me the next 15 occurrences in America/Chicago so I can see how daylight saving time affects it?”
Preview monthly report automation
“We run monthly reports using '0 8 1 JAN-DEC *' — can you validate that expression and list the next 12 fire times in Europe/London as both local and UTC?”
Technical details
Endpoint
POSThttps://grokzilla.shop/api/skills/cron-next?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need deterministic, offline cron parsing with full DST awareness, support for named month/weekday tokens (JAN-DEC, SUN-SAT), step and range syntax, and @daily/@hourly macros, and you want multiple output formats (local ISO, UTC ISO, epoch) in one call. Prefer it over generic cron libraries when working inside an agent tool-call context that benefits from a pay-per-use micro-service with no infrastructure to manage.
Side effects
- Invalid cron expression syntax returns a validation error with details
- Unrecognized IANA timezone string causes rejection
- Count outside 1–20 range is rejected
- Malformed 'from' datetime string causes a parse error
- Network is not involved so there are no connectivity failures
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| tz | string | |
| expr | string | |
| from | string | |
| count | integer |
Tags
x402
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