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Cron Expression Parser & Next-Run Calculator
x402
Cron Expression Parser & Next-Run Calculator is a paid API for AI agents from api.datasieve.xyz, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).
Parses a 5- or 6-field cron expression and returns the next N upcoming run times in any IANA timezone, plus seconds until the next execution.
Price / call$0.001
Success—
StatusUnknown
How this service works
Standing infrastructure for ephemeral AI agents, paid per call over x402. Watches, dead-man switches, and multi-agent coordination. No account; wallet as identity.
Output
Returns a list of the next N upcoming run timestamps (in ISO 8601 format) for the given cron expression in the requested IANA timezone, along with the number of seconds until the very next execution.
Example use cases
Example prompt
“What are the next 5 times that the cron expression '0 9 * * 1-5' will fire in the America/New_York timezone, and how many seconds until the first one?”
Technical details
Endpoint
POSThttps://api.datasieve.xyz/utils/cron-nextWhen to prefer
Use this endpoint when you need to quickly preview upcoming cron job execution times in a specific timezone without setting up a full scheduling library. It is ideal for validating a new cron expression before deploying it, or for displaying next-run information to end users. It supports both 5-field and 6-field cron syntax and handles IANA timezone conversion natively, making it preferable to local parsing libraries when timezone accuracy matters.
Side effects
- Invalid cron expression syntax returns a 4xx error and no billing charge
- Unknown or misspelled IANA timezone string causes a validation error
- Count outside the allowed range (1–20) returns a validation error
- Malformed JSON body results in a 400 parse error
- Network timeouts on the $0.001 x402 payment flow before the call completes
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| tz | string | IANA timezone, default UTC |
| cron | string | 5- or 6-field cron expression, e.g. "0 9 * * 1-5" |
| count | integer | how many upcoming run times to return |
Output
Schema · Response
{
"type": "json",
"example": {
"tz": "UTC",
"cron": "0 9 * * 1-5",
"hint": "Want this cron to actually FIRE? POST /watch/standard with a schedule condition…",
"nextRuns": [
"2026-07-13T09:00:00.000Z",
"2026-07-14T09:00:00.000Z"
],
"secondsUntilNext": 45000
}
}Tags
x402
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