ToolVet
80trust / 100

Fx Rate

by 3HZ Daily FX Reference Rate in Markets & finance

x402 APIPassing, checked 9 min ago

Daily reference foreign-exchange rate for any supported fiat currency pair using Frankfurter/ECB reference data. Query base and quote ISO 4217 codes. For conversion, normalization, accounting and reporting; not live trading data.

GET https://wallet-services-poc-clean.3hz-services.workers.dev/fx-rate

Last 30 days

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Status and outage history · Atom feed

Uptime
100%
Response time
238 ms typical, 355 ms slowest 5%
Last check
9 min ago
Next check
in 21 min

How to call it

GET https://wallet-services-poc-clean.3hz-services.workers.dev/fx-rate

Each call costs $0.001 in USDC on Base Sepolia, 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.

GET https://wallet-services-poc-clean.3hz-services.workers.dev/fx-rate?base=EUR&quote=USD

Parameters

ParameterTypeRequiredDescription
basestringNoThree-letter base currency code Default: "EUR".
quotestringNoThree-letter quote currency code Default: "USD".

Example response

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

{
  "base": "EUR",
  "date": "2026-09-16",
  "fetched_at": "2026-09-16T12:00:00.000Z",
  "quote": "USD",
  "rate": 1.1549,
  "rate_type": "daily_reference",
  "source": "Frankfurter",
  "source_url": "https://api.frankfurter.dev/v2/rate/EUR/USD"
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.001.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://wallet-services-poc-clean.3hz-services.workers.dev/fx-rate?base=EUR&quote=USD'

# 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://wallet-services-poc-clean.3hz-services.workers.dev/fx-rate?base=EUR&quote=USD' \
  | 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 $0.001 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.001" });
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 $0.001 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fwallet-services-poc-clean.3hz-services.workers.dev%2Ffx-rate
const res = await pay("https://wallet-services-poc-clean.3hz-services.workers.dev/fx-rate?base=EUR&quote=USD");
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 $0.001 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.001"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://wallet-services-poc-clean.3hz-services.workers.dev/fx-rate?base=EUR&quote=USD")
    print(res.status_code, res.text)

Security scan

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

Recent checks

WhenResultHTTPTimePrice
9 min agoPassed402355 ms$0.001
4 h agoPassed402327 ms$0.001
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