Fx Rates

Last 30 days

Uptime

100%

Response time

234 ms typical, 234 ms slowest 5%

Last check

2 h ago

Next check

any minute now

How to call it

# See the payment challenge (nothing is charged)
curl -i -X GET "https://4yearcycle.com/x402/fx-rates?base=USD&symbols=EUR%2CGBP%2CJPY%2CCHF"

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%2F4yearcycle.com%2Fx402%2Ffx-rates
const res = await pay("https://4yearcycle.com/x402/fx-rates?base=USD&symbols=EUR%2CGBP%2CJPY%2CCHF");
console.log(await res.json());

Example input

{
  "base": "USD",
  "symbols": "EUR,GBP,JPY,CHF"
}

Example output

{
  "base": "USD",
  "date": "2026-08-17",
  "notice": "ECB euro foreign exchange reference rates, available free of charge at ecb.europa.eu; non-EUR bases are cross-rates computed via EUR.",
  "rates": {
    "CHF": 0.809885,
    "EUR": 0.862589,
    "GBP": 0.737514,
    "JPY": 159.225395
  },
  "source": "ECB"
}

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