Koyomi

Last 30 days

Uptime

100%

Response time

895 ms typical, 938 ms slowest 5%

Last check

30 min ago

Next check

any minute now

How to call it

# See the payment challenge (nothing is charged)
curl -i -X GET "https://japan-business-day-api.matchan962.workers.dev/v1/koyomi?date=2026-10-25"

import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client } from "@x402/core/client";
import { ExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

const client = new x402Client().register(
  "eip155:8453",
  new ExactEvmScheme(privateKeyToAccount(process.env.AGENT_KEY)),
);
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? Preflight it first for $0.005:
// GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fjapan-business-day-api.matchan962.workers.dev%2Fv1%2Fkoyomi
const res = await pay("https://japan-business-day-api.matchan962.workers.dev/v1/koyomi?date=2026-10-25");
console.log(await res.json());

Example input

{
  "date": "2026-10-25"
}

Example output

{
  "date": "2026-10-25",
  "lunar": {
    "text": "旧暦9月15日"
  },
  "rokuyo": {
    "name": "大安",
    "reading": "taian"
  },
  "wareki": {
    "text": "令和8年10月25日"
  }
}

Security scan

• No findings. We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.

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