ToolVet
80trust / 100

Cron

by SiteCheck in Developer tools

x402 APIPassing, checked 3 h ago

Explains a cron expression in plain English and lists its next runs in UTC and in a time zone. Five fields (minute hour day month weekday), or six with seconds first. Names (MON, JAN) and steps are supported. Computed in the Worker; no network call.

GET
https://api.sitecheck-api.workers.dev/api/cron
Price
$0.001
per call in USDC
Uptime
100%
last 30 days
Response time
234 ms
849 ms slowest 5%
Last check
Passed
3 h ago, next any minute now

Run a free test callHow to call it

Reliability

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Status and outage history · Atom feed

How to call it

GET https://api.sitecheck-api.workers.dev/api/cron

Each call costs $0.001 in USDC on Base, paid with the request over x402.

Run a free test callOne unpaid request, the way an agent sends it. You see the payment challenge it gets back. Nothing is charged.

Example request

From the listing.

GET https://api.sitecheck-api.workers.dev/api/cron?count=3&expression=*%2F15+9-17+*+*+1-5&tz=Europe%2FBerlin

Parameters

ParameterTypeRequiredDescription
countstringNoNext runs, 1 to 20 (default 5)
expressionstringYesCron expression, 5 or 6 fields
tzstringNoIANA time zone for the local times, e.g. Europe/Berlin (default UTC)

Example response

The provider's example. We can't check it without paying.

Example response, 26 lines
{
  "checkedAt": "2026-10-14T07:00:59.160Z",
  "explanation": "Every 15 minutes, from 09:00 to 17:59, on Monday to Friday",
  "expression": "*/15 9-17 * * 1-5",
  "nextRuns": [
    {
      "local": "2026-10-14 09:15:00",
      "utcOffset": "+02:00"
    },
    {
      "local": "2026-10-14 09:30:00",
      "utcOffset": "+02:00"
    },
    {
      "local": "2026-10-14 09:45:00",
      "utcOffset": "+02:00"
    }
  ],
  "nextRunsUtc": [
    "2026-10-14T07:15:00.000Z",
    "2026-10-14T07:30:00.000Z",
    "2026-10-14T07:45:00.000Z"
  ],
  "source": "built-in cron parser (no network)",
  "timezone": "Europe/Berlin"
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.001.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://api.sitecheck-api.workers.dev/api/cron?count=3&expression=*%2F15+9-17+*+*+1-5&tz=Europe%2FBerlin'

# x402 v2 sends the challenge base64-encoded in the PAYMENT-REQUIRED header (v1 sends it in the body).
# To read the header:
curl -sS -g -o /dev/null -D - 'https://api.sitecheck-api.workers.dev/api/cron?count=3&expression=*%2F15+9-17+*+*+1-5&tz=Europe%2FBerlin' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode
JavaScript: pay and call
// npm i @x402/fetch @x402/evm viem
import { wrapFetchWithPayment, x402Client } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

// Pays at most $0.001 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.001" });
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.EVM_PRIVATE_KEY) });
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? ToolVet checks it first for $0.005. Pay for that from a separate
// client: this one is capped at $0.001 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapi.sitecheck-api.workers.dev%2Fapi%2Fcron
const res = await pay("https://api.sitecheck-api.workers.dev/api/cron?count=3&expression=*%2F15+9-17+*+*+1-5&tz=Europe%2FBerlin");
console.log(res.status, await res.text());
Python: pay and call
# pip install "x402[requests,evm]"
import os
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client

# Pays at most $0.001 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.001"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://api.sitecheck-api.workers.dev/api/cron?count=3&expression=*%2F15+9-17+*+*+1-5&tz=Europe%2FBerlin")
    print(res.status_code, res.text)

Security scan

No findings

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Recent checks

WhenResultHTTPTimePrice
3 h agoPassed402349 ms$0.001
7 h agoPassed402234 ms$0.001
12 h agoPassed40254 ms$0.001
16 h agoPassed402285 ms$0.001
20 h agoPassed40241 ms$0.001
Show 1 older checks
24 h agoPassed402849 ms$0.001