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SiteCheck Cron Expression Parser
x402
SiteCheck Cron Expression Parser is a paid API for AI agents from api.sitecheck-api.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-27).
Parses a cron expression and returns the next N scheduled run times with human-readable explanations, optionally localized to a given timezone.
Price / call$0.002
Success—
StatusUnknown
How this service works
Explains a cron expression in plain English and lists its next runs in UTC and in a time zone. Five fields (minute hour day month weekday), or six with seconds first. Names (MON, JAN) and steps are supported. Computed in the Worker; no network call.
Output
Returns a JSON object with: a plain-English explanation of the cron expression, an array of next run times in local time with UTC offset, the corresponding UTC timestamps, the timezone used, and a checkedAt ISO timestamp. Computed entirely server-side with no external network calls.
Example use cases
Preview cron job schedule before deploying
“Before I deploy this job, can you tell me when '0 8 * * 1' will next run — show me the next 5 occurrences in America/New_York time?”
Explain cryptic cron expression to non-technical teammate
“What does the cron expression '30 6 1 * *' actually mean in plain English, and when will it fire next — show me 3 upcoming runs in UTC?”
Audit scheduled tasks firing too frequently
“I have a cron set to '*/5 * * * *' — can you show me the next 10 times it will run in Asia/Tokyo time so I can confirm it's not triggering too often?”
Technical details
Endpoint
GEThttps://api.sitecheck-api.workers.dev/api/cron?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to quickly compute and preview upcoming cron job fire times without setting up a local cron library. Ideal for DevOps agents validating deployment schedules, automation builders previewing task cadences, or any workflow that needs a human-readable explanation of a cron expression in a specific timezone — all with a single cheap API call at $0.001.
Side effects
- Invalid or malformed cron expression returns an error
- count outside 1-20 range may be rejected or clamped
- Unrecognized IANA timezone string causes a timezone resolution error
- 6-field cron expressions may not be supported by all parsers — behavior may vary
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"source": "built-in cron parser (no network)",
"nextRuns": [
{
"local": "2026-10-14 09:15:00",
"utcOffset": "+02:00"
},
{
"local": "2026-10-14 09:30:00",
"utcOffset": "+02:00"
},
{
"local": "2026-10-14 09:45:00",
"utcOffset": "+02:00"
}
],
"timezone": "Europe/Berlin",
"checkedAt": "2026-10-14T07:00:59.160Z",
"expression": "*/15 9-17 * * 1-5",
"explanation": "Every 15 minutes, from 09:00 to 17:59, on Monday to Friday",
"nextRunsUtc": [
"2026-10-14T07:15:00.000Z",
"2026-10-14T07:30:00.000Z",
"2026-10-14T07:45:00.000Z"
]
}
}Tags
x402
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