Validate a 5-field cron expression (lists, ranges, steps, JAN-DEC/SUN-SAT names,
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.
Answeringour last check, 2026-10-18
1 of 1checks answered this week
281 msmedian answer time
$0.0031listed price per call
$0.0031price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
POST https://grokzilla.shop/api/skills/cron-next
| Category | Everything else |
|---|---|
| Provider host | grokzilla.shop |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 2 from 2 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-18 | valid payment request | 402 | $0.0031 | 281 ms |
Example input (from the provider)
{
"body": {
"count": 3,
"expr": "*/15 9-17 * * MON-FRI",
"from": "2026-10-16T12:42:00-05:00",
"tz": "America/Chicago"
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"properties": {
"count": {
"default": 5,
"maximum": 20,
"minimum": 1,
"type": "integer"
},
"expr": {
"maxLength": 200,
"minLength": 1,
"type": "string"
},
"from": {
"maxLength": 64,
"minLength": 1,
"type": "string"
},
"tz": {
"default": "UTC",
"maxLength": 64,
"minLength": 1,
"type": "string"
}
},
"required": [
"expr"
],
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"count": {
"type": "integer"
},
"expr": {
"type": "string"
},
"fields": {
"properties": {
"day_of_month": {
"items": {
"type": "integer"
},
"type": "array"
},
"day_of_week": {
"items": {
"type": "integer"
},
"type": "array"
},
"hour": {
"items": {
"type": "integer"
},
"type": "array"
},
"minute": {
"items": {
"type": "integer"
},
"type": "array"
},
"month": {
"items": {
"type": "integer"
},
"type": "array"
}
},
"type": "object"
},
"from": {
"type": "string"
},
"next": {
"items": {
"type": "string"
},
"type": "array"
},
"next_epoch_s": {
"items": {
"type": "integer"
},
"type": "array"
},
"next_utc": {
"items": {
"type": "string"
},
"type": "array"
},
"normalized": {
"type": "string"
},
"ok": {
"type": "boolean"
},
"skill": {
"type": "string"
},
"tz": {
"type": "string"
}
},
"required": [
"ok",
"skill"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}