# Cron Next 6-5 — Next 5 UTC Execution Times for 6-Field Cron Expression

> Cron Next 6-5 — Next 5 UTC Execution Times for 6-Field Cron Expression is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-02).

Given a 6-field cron expression and a start datetime, returns the next 5 UTC times the cron job would fire.

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/cron-next-6-5?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/cron-next-6-5-next-5-utc-execution-times-for-6-field-cron-expression-f6977017
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_lIcsV-xcDBxzmw9h7klzU

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-next-6-5-next-5-utc-execution-times-for-6-field-cron-expression-f6977017 -d '<json body>'
```

Example prompt: What are the next 5 times this cron job will fire — the expression is '0 30 9 * * MON-FRI' — starting from 2025-06-01T00:00:00Z?

## When to prefer this

Use this endpoint when you need to compute upcoming scheduled execution times for a 6-field cron expression (including seconds field) and want a deterministic, paid computation without running a cron library locally. Prefer the unpaid sandbox variant (POST /v1/sandbox/cron-next-6-5) for testing; use this paid endpoint for production agent workflows where reliability matters.

## Known failure modes

- Invalid or malformed cron expression returns an error
- Expression with fewer or more than 6 fields is rejected
- Invalid 'from' datetime format causes a parsing error
- Cron expression that never fires (e.g. Feb 30) may return an error or empty result
- Payment of $0.01 USDC not provided results in HTTP 402 Payment Required

## How this service works

Call when an agent needs the next 5 UTC times for a 6-field cron expression. Exact $0.01 USDC. Prefer unpaid POST /v1/sandbox/cron-next-6-5 first.

## Output

Returns an ordered list of the next 5 UTC datetimes at which the provided 6-field cron expression would fire, calculated from the given start datetime.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "from": {
   "type": "string",
   "format": "date-time",
   "examples": [
    "2026-01-01T00:00:00.000Z"
   ],
   "description": "ISO datetime to count forward from. Omit it to start at the current time."
  },
  "expression": {
   "type": "string",
   "examples": [
    "0 0 * * * *"
   ],
   "maxLength": 200,
   "minLength": 1,
   "description": "Cron expression. The route says whether it is 5 fields or 6 fields. Example: 0 9 * * 1-5."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/cron-next-6-5-next-5-utc-execution-times-for-6-field-cron-expression-f6977017/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agentshelf.syntexa.ch](https://www.zero.xyz/host/agentshelf.syntexa.ch/llms.txt)