# x402 Utils – Cron Expression Explainer

> x402 Utils – Cron Expression Explainer is a paid API for AI agents from qcb7fnxsbd7fbhj4.68r.lambda-web.us-east-1.on.aws, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-29).

Parses a cron expression and returns a plain-English description plus its next N scheduled run times in a given time zone.

## Facts

- Endpoint: GET https://qcb7fnxsbd7fbhj4.68r.lambda-web.us-east-1.on.aws/v1/cron?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-utils-cron-expression-explainer-590b454e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_bELg_AP-u4gm73x5mu_E6

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability x402-utils-cron-expression-explainer-590b454e
```

Example prompt: Can you explain what the cron expression '0 9 * * 1-5' means in plain English and show me the next 10 run times in America/New_York?

## When to prefer this

Use this endpoint when you need to interpret or debug a cron expression in natural language, or compute the precise upcoming run times of a scheduled job — especially when dealing with advanced cron syntax like L (last), W (weekday), or # (nth weekday) that many simple parsers do not support. It supports both 5-field (standard Unix) and 6-field (with seconds) expressions.

## Known failure modes

- Invalid cron expression returns an error describing the parse failure
- Unsupported IANA time zone name results in an error
- Count outside 1-50 range is rejected with a validation error
- Missing required 'expr' query parameter returns a bad request error

## How this service works

Explain a cron expression in plain English and list its next run times in a time zone (5 or 6 fields, with ranges, steps, L, W and #).

## Output

Returns a plain-English description of the cron expression's schedule and a list of upcoming run timestamps (up to 50) in the requested IANA time zone, covering 5- and 6-field expressions with ranges, steps, L, W, and # syntax.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "expr"
     ],
     "properties": {
      "tz": {
       "type": "string",
       "description": "IANA time zone, default UTC"
      },
      "expr": {
       "type": "string",
       "description": "the cron expression, such as 0 9 * * 1-5"
      },
      "count": {
       "type": "integer",
       "description": "how many next runs (1-50, default 5)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "next": {},
      "description": {}
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-utils-cron-expression-explainer-590b454e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from qcb7fnxsbd7fbhj4.68r.lambda-web.us-east-1.on.aws](https://www.zero.xyz/host/qcb7fnxsbd7fbhj4.68r.lambda-web.us-east-1.on.aws/llms.txt)