ToolVet
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Exchange Rates

by AgentUtility.ai in Markets & finance

x402 APIPassing, checked 4 h ago

Exchange rates. Latest or historical FX rates between currencies, sourced from the European Central Bank (Frankfurter API). 30+ currency pairs. Optional amount conversion. No commercial restrictions. Specify a base currency (default USD), an optional quote currency or list, an optional date (YYYY-MM-DD or 'latest'), and an optional amount to also receive a converted value when a single quote is supplied.

POST
https://x402.agentutility.ai/exchange-rates
Price
$0.002
per call in USDC
Uptime
79.2%
last 30 days
Response time
275 ms
4.5 s slowest 5%
Last check
Passed
4 h ago, next any minute now

Run a free test callHow to call it

Reliability

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Status and outage history · Atom feed

How to call it

POST https://x402.agentutility.ai/exchange-rates

Each call costs $0.002 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://x402.agentutility.ai/exchange-rates
content-type: application/json

{
  "amount": 100,
  "base": "USD",
  "quote": [
    "EUR",
    "GBP",
    "JPY"
  ]
}

Parameters

ParameterTypeRequiredDescription
amountnumberNoOptional amount in the base currency. When a single quote is supplied, the response includes the converted amount.
basestringNoISO 4217 base currency code (e.g. 'USD', 'EUR'). Default 'USD'.
datestringNo'latest' (default) or a historical date in YYYY-MM-DD format.
quoteanyNoSingle ISO 4217 quote currency, or array of codes. Omit for all available rates.

Example response

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

{
  "base": "USD",
  "date": "2026-05-06",
  "rates": {
    "EUR": 0.92,
    "GBP": 0.79,
    "JPY": 154.21
  },
  "source": "https://api.frankfurter.dev"
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.002.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://x402.agentutility.ai/exchange-rates' \
  -H 'content-type: application/json' \
  --data-raw '{"amount":100,"base":"USD","quote":["EUR","GBP","JPY"]}'

# 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://x402.agentutility.ai/exchange-rates' \
  -H 'content-type: application/json' \
  --data-raw '{"amount":100,"base":"USD","quote":["EUR","GBP","JPY"]}' \
  | 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 $0.002 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.002" });
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 $0.002 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fx402.agentutility.ai%2Fexchange-rates&method=POST
const res = await pay("https://x402.agentutility.ai/exchange-rates", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "amount": 100,
    "base": "USD",
    "quote": [
      "EUR",
      "GBP",
      "JPY"
    ]
  }),
});
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 $0.002 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.002"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://x402.agentutility.ai/exchange-rates",
        json={
            "amount": 100,
            "base": "USD",
            "quote": [
                "EUR",
                "GBP",
                "JPY",
            ],
        },
    )
    print(res.status_code, res.text)

Security scan

No findings

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Recent checks

WhenResultHTTPTimePrice
4 h agoPassed402131 ms$0.002
8 h agoPassed402159 ms$0.002
12 h agoPassed4024.5 s$0.002
16 h agoPassed4024.6 s$0.002
20 h agoPassed402275 ms$0.002
Show 10 older checks
24 h agoPassed402391 ms$0.002
28 h agoPassed4022.4 s$0.002
32 h agoPassed402220 ms$0.002
36 h agoPassed402147 ms$0.002
39 h agoTimed out---
43 h agoTimed out---
46 h agoPassed4024.0 s$0.002
2 days agoPassed402143 ms$0.002
2 days agoPassed402397 ms$0.002
2 days agoTimed out---