Timezone convert

Convert a datetime from one IANA timezone to another. Send GET /api/timezone-convert with the required fields datetime, from and to and pay $0.001 per call over x402 or MPP, or call it free by solving a proof-of-work challenge. It returns a JSON object with input, from, to and utc.

Accepts ISO 8601, Unix timestamps (seconds or milliseconds), or natural date strings. Returns the converted time in both timezones with UTC offset. ?datetime=2026-06-23T14:00:00&from=America/New_York&to=Asia/Tokyo.

Category: Live public data · Tags: timezone convert datetime iana utc

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Parameters

Example request

curl -i "https://agent402.tools/api/timezone-convert?datetime=2026-06-23T14%3A00%3A00&from=America%2FNew_York&to=Asia%2FTokyo"

Without payment this returns HTTP 402 Payment Required with the exact price for timezone-convert; any x402 v2 or MPP client pays it and retries.

Example response

{
  "input": "2026-06-23T14:00:00",
  "from": {
    "timezone": "America/New_York",
    "formatted": "06/23/2026, 14:00:00 EDT"
  },
  "to": {
    "timezone": "Asia/Tokyo",
    "formatted": "06/24/2026, 03:00:00 JST"
  },
  "utc": "2026-06-23T18:00:00.000Z"
}

From an MCP client

catalog.call {
  "slug": "timezone-convert",
  "params": {
    "datetime": "2026-06-23T14:00:00",
    "from": "America/New_York",
    "to": "Asia/Tokyo"
  }
}

On the hosted connector at https://agent402.tools/mcp, catalog.call runs timezone-convert free (rate-limited, no wallet). Local install: npx -y agent402-mcp.

Errors and behavior

• datetime, from and to are required. An input the tool rejects returns an HTTP 4xx whose body carries error, tool, expected, required and example, so the caller can correct it.
• A paid call that ends in any status of 400 or above is not charged over x402, MPP or a prepaid credits key: settlement is cancelled when the tool fails. The exception is a Tempo push credential, a transfer the buyer sent before the call: it settles before the tool runs, so if the tool then fails the payment is recorded as a refund owed to the paying wallet.
• Free tier: no outbound network call leaves the server for this tool, so proof-of-work (16 leading zero bits of sha256) pays for it.
• A POST with a JSON body to /api/timezone-convert is served as this GET, with the body as the input.
• An Idempotency-Key header makes a retried paid call replay the first 200 instead of charging again (an answer larger than 1 MB is not replayed).

Paid call (JavaScript agent)

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

const client = new x402Client();
client.setSpendControls?.(false); // keep your own spending ceiling in code
registerExactEvmScheme(client, { signer: privateKeyToAccount(KEY) });
const payFetch = wrapFetchWithPayment(fetch, client);

const res = await payFetch("https://agent402.tools/api/timezone-convert?datetime=2026-06-23T14%3A00%3A00&from=America%2FNew_York&to=Asia%2FTokyo");

No wallet? Pay with compute

Fetch a challenge, solve the sha256 puzzle (16 leading zero bits, a fraction of a second of CPU), and resend with the X-Pow-Solution header:

import { createHash } from "node:crypto";
const lz = (b) => { let t = 0; for (const x of b) { if (!x) { t += 8; continue; } t += Math.clz32(x) - 24; break; } return t; };
const c = await (await fetch("https://agent402.tools/api/pow/challenge?slug=timezone-convert")).json();
let n = 0;
while (lz(createHash("sha256").update(c.challenge + ":" + n).digest()) < c.difficulty) n++;
await fetch("https://agent402.tools/api/timezone-convert?datetime=2026-06-23T14%3A00%3A00&from=America%2FNew_York&to=Asia%2FTokyo", { method: "GET", headers: { "X-Pow-Solution": c.token + ":" + n } });

Part of these workflows

Timezone convert is one step in this skill pack, each sold as a single call:

• Locale brief - "Can I reach this counterparty this week?" - country facts, this year's public holidays, working days remaining this week, and what time it is there right now, in one call.

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