Vextorium Cron Expression Validator & Explainer

x402

Vextorium Cron Expression Validator & Explainer is a paid API for AI agents from api.vextorium.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-16).

Validates a cron expression, explains it in plain English, and lists upcoming run times with DST-aware timezone support

Price / call$0.003

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StatusUnknown

How this service works

Validate a 5-field cron expression (ranges, steps, names, @daily aliases), explain it in plain English and list its next run times in any time zone, DST-aware.

Output

Returns a JSON object with: a boolean validity flag, the normalized cron expression, a plain-English explanation of each field, an array of the requested next run timestamps in ISO 8601 format (with UTC offset), the resolved timezone, and the maximum number of executions per day.

Example use cases

Debugging a misconfigured cron job

“I wrote this cron expression '0 8 * * 1-5' for a daily morning job but I'm not sure it's right — can you validate it and tell me in plain English what it does, then show me the next 5 runs in America/New_York?”

Verifying a DST-aware production schedule

“We're about to deploy a batch job with cron '0 2 * * *' in the Europe/London timezone — can you confirm it's valid and list the next 20 run times so I can check what happens around the DST transition?”

Explaining a @-alias cron shorthand

“What does the cron shorthand '@hourly' actually mean? Can you validate it, explain it in plain English, and show me the next 5 executions starting from now in UTC?”

Technical details

Endpoint

POSThttps://api.vextorium.com/cron-explicar-pago?utm_source=zero.xyz

When to prefer

Choose this endpoint when you need to validate cron syntax (including @-aliases like @daily), understand what a cron expression actually does in plain English, or preview upcoming run times with correct DST handling in a specific IANA timezone. Prefer this over generic cron parsers when timezone-awareness and human-readable explanations are both required in a single call.

Side effects

Invalid cron syntax — returns valida: false with no run times
Unknown IANA timezone string — likely rejected or defaults to UTC
proximas out of range (must be 1–50) — schema validation error
Invalid ISO datetime in 'desde' field — parsing error
Missing required 'expresion' field — 400 bad request

Input

Schema · Request body

Field	Type	Description
zona	string	IANA time zone (default UTC)
desde	string	Start from this ISO date-time (default now)
proximas	integer	Next runs to list (1-50, default 5)
expresion	string	Cron expression, e.g. 0 8 * * 1-5 or @hourly

Output

Schema · Response

{
  "type": "json",
  "example": {
    "zona": "Europe/Madrid",
    "valida": true,
    "expresion": "*/15 9-17 * * mon-fri",
    "explicacion": "minute 0, 15, 30, 45, hour 9, 10, 11, 12, 13, 14, 15, 16, 17, any day of month, every month, weekday Monday, Tuesday, Wednesday, Thursday, Friday",
    "proximas_ejecuciones": [
      "2026-10-02T16:45+02:00",
      "2026-10-02T17:00+02:00",
      "2026-10-02T17:15+02:00",
      "2026-10-02T17:30+02:00",
      "2026-10-02T17:45+02:00"
    ],
    "ejecuciones_por_dia_max": 36
  }
}

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