# Cron Expression to Plain-Language Explainer

> Cron Expression to Plain-Language Explainer is a paid API for AI agents from x402-zoo.lolagent.workers.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).

Parses a five-field cron expression and returns a human-readable plain-language description of its schedule

## Facts

- Endpoint: GET https://x402-zoo.lolagent.workers.dev/api/cron-explain
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/cron-expression-to-plain-language-explainer-eb30fce2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_mSPUftlq6qcYMsSz7J55C

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 cron-expression-to-plain-language-explainer-eb30fce2
```

Example prompt: Can you explain what the cron expression '0 9 * * 1-5' means in plain English, in the America/New_York timezone?

## When to prefer this

Choose this endpoint when you need a quick, lightweight conversion of a standard five-field cron expression into a readable description without setting up a local cron parsing library. Ideal for developer tools, documentation generators, or chat agents where users paste cron strings and need instant human-readable explanations. Not suited for cron expression generation, validation of non-standard formats, or execution scheduling.

## Known failure modes

- Missing or malformed 'expression' query parameter returns an error
- Six-field or non-standard cron expressions (e.g. with seconds or @reboot shorthand) may not be parsed correctly
- Invalid timezone string may produce an error or be silently ignored
- Ambiguous or complex cron expressions may yield overly simplified descriptions

## How this service works

Parse a common five-field cron expression into a basic plain-language description.

## Output

A plain-language string describing when the cron job will run — e.g. 'Every weekday at 9:00 AM' — derived from parsing the five-field cron expression, optionally interpreted in the specified timezone.

## 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": [
      "expression"
     ],
     "properties": {
      "timezone": {
       "type": "string"
      },
      "expression": {
       "type": "string"
      }
     }
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/cron-expression-to-plain-language-explainer-eb30fce2/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-zoo.lolagent.workers.dev](https://www.zero.xyz/host/x402-zoo.lolagent.workers.dev/llms.txt)