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Cron Next-Run Calculator
x402
Cron Next-Run Calculator is a paid API for AI agents from schedule-tools.use.x402atlas.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).
Calculates future scheduled run times for POSIX five-field cron expressions, respecting IANA timezones and configurable daylight-saving time (DST) policies.
Price / call$0.005
Success—
StatusUnknown
How this service works
Cron next-run calculator — generate future times for bounded five-field POSIX cron schedules in IANA timezones with explicit daylight-saving (DST) policies.
Output
Returns a list of future fire times in RFC 3339 format for the given cron expression, honoring the specified IANA timezone and DST handling policy (e.g., skip, repeat, or error on ambiguous/gap times). Each timestamp is explicitly offset-qualified.
Example use cases
Preview nightly batch job schedule
“I have a cron job set to '0 2 * * *' running in Europe/Berlin — can you show me the next 7 fire times so I can check whether it shifts around the DST changeover?”
Verify weekly report cron timing
“My weekly report cron is '0 9 * * 1' in America/New_York — give me the next 4 run times so I can confirm it always fires at 9am and not 8am after the clocks change.”
Debug irregular cron pattern
“I'm not sure when '15 14 1,15 * *' will next fire in Asia/Tokyo — can you calculate the next 3 occurrences so I can plan around them?”
Technical details
Endpoint
POSThttps://schedule-tools.use.x402atlas.com/cron-nextWhen to prefer
Use this endpoint when you need precise, timezone-aware future execution times for POSIX cron schedules — especially when DST transitions must be handled explicitly (skip, duplicate, or error). Prefer this over generic date arithmetic when the input is a cron string rather than an interval or RRULE recurrence pattern. For iCalendar RRULE-based schedules, use the sibling RRULE expander instead.
Side effects
- Invalid cron expression (non-five-field or unsupported syntax) returns a validation error
- Unrecognized IANA timezone string returns an error
- Requested count exceeds bounded maximum returns an error
- Start datetime in a DST gap with strict policy returns an error
- Malformed request body returns HTTP 400
Tags
x402
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