Datetime Validate

{
  "asOf": "2026-10-11T14:26:45.079Z",
  "dayOfYear": 354,
  "degraded": false,
  "disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
  "durationSecondsIfFixed": null,
  "epochSeconds": 851042397,
  "errors": [],
  "hasUtcOffset": true,
  "input": "1996-12-19T16:39:57-08:00",
  "intervalForm": null,
  "isIso8601": true,
  "isRfc3339": true,
  "isoWeekDate": "1996-W51-4",
  "kind": "date-time",
  "leapSecond": false,
  "notChecked": [
    "the ISO 8601 standard text itself (paywalled, not read); rules follow RFC 3339 and common public summaries",
    "time zone names such as Europe/Paris (not part of either format)",
    "…2 more"
  ],
  "reasons": [],
  "reducedPrecision": false,
  "source": "RFC 3339 and public ISO 8601 summaries, computed locally",
  "summary": "\"1996-12-19T16:39:57-08:00\" is a date-time, valid RFC 3339 and ISO 8601.",
  "utcInstant": "1996-12-20T00:39:57Z",
  "utcOffsetMinutes": -480,
  "valid": true,
  "verdict": "VALID_RFC3339",
  "weekday": "Thursday"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://dev-reference.x402tookit.com/datetime-validate?value=1996-12-19T16%3A39%3A57-08%3A00'

# 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://dev-reference.x402tookit.com/datetime-validate?value=1996-12-19T16%3A39%3A57-08%3A00' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode

// 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 $0.02 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.02" });
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 $0.02 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fdev-reference.x402tookit.com%2Fdatetime-validate
const res = await pay("https://dev-reference.x402tookit.com/datetime-validate?value=1996-12-19T16%3A39%3A57-08%3A00");
console.log(res.status, await res.text());

# 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 $0.02 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.02"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://dev-reference.x402tookit.com/datetime-validate?value=1996-12-19T16%3A39%3A57-08%3A00")
    print(res.status_code, res.text)