ToolVet
78trust / 100

Holiday Check

by agentshelf.syntexa.ch in Developer tools

x402 APIPassing, checked 11 min ago

Call when an agent needs whether a YYYY-MM-DD date is a public holiday, plus the English name. Send date and country (ISO 3166-1 alpha-2). Covers US, CA, GB, IE, and much of Europe plus AU and NZ. Unknown countries error. No network. Send JSON {"date":"2026-12-25","country":"US"}. Exact $0.003 USDC on Base. Try unpaid POST /v1/sandbox/holiday-check first.

POST
https://agentshelf.syntexa.ch/v1/holiday-check
Price
$0.003
per call in USDC
Uptime
100%
last 30 days
Response time
33 ms
96 ms slowest 5%
Last check
Passed
11 min ago, next in 18 min

Run a free test callHow to call it

Reliability

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Status and outage history · Atom feed · Watch with other listings

How to call it

POST https://agentshelf.syntexa.ch/v1/holiday-check

Each call costs $0.003 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.

POST https://agentshelf.syntexa.ch/v1/holiday-check
content-type: application/json

{
  "country": "US",
  "date": "2026-12-25"
}

Parameters

ParameterTypeRequiredDescription
countrystringYesISO 3166-1 alpha-2 country. Example: US. Bundled calendars: US, CA, GB, IE, DE, FR, IT, CH, AT, BE, NL, LU, ES, PT, PL, SE, NO, DK, FI, AU, NZ. Unknown codes error. National days only; regional holidays are omitted. The calendar field names the set.
datestringYesCalendar date in YYYY-MM-DD. Example: 2026-12-25. Interpreted as a civil date, not a timestamp. Returns holiday and English names. Years outside 1970-2100 are rejected.

Example response

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

{
  "billed": true,
  "calendar": "US federal holidays. Weekend dates also list the observed weekday.",
  "country": "US",
  "date": "2026-12-25",
  "holiday": true,
  "names": [
    "Christmas Day"
  ],
  "ok": true,
  "receipt_id": "rcpt_01EXAMPLE000000000000000",
  "warnings": []
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.003.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://agentshelf.syntexa.ch/v1/holiday-check' \
  -H 'content-type: application/json' \
  --data-raw '{"country":"US","date":"2026-12-25"}'

# 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 - -X POST 'https://agentshelf.syntexa.ch/v1/holiday-check' \
  -H 'content-type: application/json' \
  --data-raw '{"country":"US","date":"2026-12-25"}' \
  | 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 $0.003 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.003" });
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 $0.003 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fagentshelf.syntexa.ch%2Fv1%2Fholiday-check&method=POST
const res = await pay("https://agentshelf.syntexa.ch/v1/holiday-check", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "country": "US",
    "date": "2026-12-25"
  }),
});
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 $0.003 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.003"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://agentshelf.syntexa.ch/v1/holiday-check",
        json={
            "country": "US",
            "date": "2026-12-25",
        },
    )
    print(res.status_code, res.text)

Security scan

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