Cron Expression Explainer

x402

Cron Expression Explainer is a paid API for AI agents from agent402.tools, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).

Parses a standard 5-field cron expression and returns a human-readable English explanation of its schedule

Price / call$0.001

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StatusUnknown

How this service works

Parse a standard 5-field cron expression (minute hour day-of-month month day-of-week) and return a human-readable explanation. Supports wildcards (*), ranges (1-5), lists (1,3,5), steps (*/15), and named months/days (JAN, MON). ?expression=0+9+*+*...

Output

A human-readable explanation of when the cron job fires, describing the schedule in plain English (e.g. 'At 9:00 AM, Monday through Friday'). Covers wildcards, ranges, lists, steps, and named month/day values.

Example use cases

Example prompt

“Can you explain what this cron expression means in plain English: 0 9 * * 1-5?”

Technical details

Endpoint

GEThttps://agent402.tools/api/cron-explain

When to prefer

Use this endpoint when an agent needs to explain a cron expression to a user in natural language, validate that a cron string is well-formed, or surface scheduling information in a human-readable way. Ideal for DevOps automation, CI/CD pipeline inspection, or any workflow where a user needs to understand a scheduled task without knowing cron syntax.

Side effects

Missing or empty expression query parameter returns an error
Malformed cron expression with wrong number of fields returns a parse error
Invalid field values (e.g. minute > 59) may return a validation error
Non-standard 6-field cron expressions (with seconds) are not supported

Input

Schema · Request body

Field	Type	Description
inputrequired	object
output	object

Output

Schema · Response

{
  "type": "json",
  "example": {
    "fields": {
      "hour": "9",
      "month": "*",
      "minute": "0",
      "dayOfWeek": "1-5",
      "dayOfMonth": "*"
    },
    "summary": "At 09:00, every day, day of week Monday through Friday",
    "expression": "0 9 * * 1-5"
  }
}

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How this service works

Output

Technical details

Endpoint

GEThttps://agent402.tools/api/cron-explain

When to prefer

Side effects

Missing or empty expression query parameter returns an error
Malformed cron expression with wrong number of fields returns a parse error
Invalid field values (e.g. minute > 59) may return a validation error
Non-standard 6-field cron expressions (with seconds) are not supported

Input

Schema · Request body

Field	Type	Description
inputrequired	object
output	object

Output

Schema · Response

{
  "type": "json",
  "example": {
    "fields": {
      "hour": "9",
      "month": "*",
      "minute": "0",
      "dayOfWeek": "1-5",
      "dayOfMonth": "*"
    },
    "summary": "At 09:00, every day, day of week Monday through Friday",
    "expression": "0 9 * * 1-5"
  }
}