ToolVet
78trust / 100

Fx Official

by eu-verify in Markets & finance

x402 APIPassing, checked 3 h ago

Official US Treasury Reporting Rates of Exchange: the legal USD conversion rates required for FBAR/8938 filings and US federal accounting, covering ~170 currencies including exotics absent from ECB feeds. Query: ?currencies=Euro Zone-Euro,Japan-Yen (optional, all if omitted) and ?date=YYYY-MM-DD (latest quarterly rate at or before that date, default today). Returns units of foreign currency per 1 USD. Source updates quarterly; served with a 7-day cache.

GET
https://data.greeneris.io/v1/fx/official
Price
$0.005
per call in USDC
Uptime
100%
last 30 days
Response time
180 ms
356 ms slowest 5%
Last check
Passed
3 h ago, next any minute now

Run a free test callHow to call it

Reliability

All checks passedSome failedAll failedNot checked

Status and outage history · Atom feed

How to call it

GET https://data.greeneris.io/v1/fx/official

Each call costs $0.005 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.

GET https://data.greeneris.io/v1/fx/official?currencies=Euro+Zone-Euro%2CJapan-Yen&date=2026-06-30

Parameters

ParameterTypeRequiredDescription
currenciesstringNoComma-separated Treasury 'Country-Currency' descriptors, max 30 (optional -> all)
datestringNoYYYY-MM-DD; latest quarterly rate at or before this date (default today)

Example response

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

{
  "as_of": "2026-06-30",
  "count": 2,
  "rates": [
    {
      "country": "Euro Zone",
      "country_currency": "Euro Zone-Euro",
      "currency": "Euro",
      "effective_date": "2026-06-30",
      "rate_per_usd": 0.877,
      "record_date": "2026-06-30"
    }
  ],
  "source": "US Treasury FiscalData, Reporting Rates of Exchange (quarterly official rates, public domain)"
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.005.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://data.greeneris.io/v1/fx/official?currencies=Euro+Zone-Euro%2CJapan-Yen&date=2026-06-30'

# 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://data.greeneris.io/v1/fx/official?currencies=Euro+Zone-Euro%2CJapan-Yen&date=2026-06-30' \
  | 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 $0.005 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.005" });
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 $0.005 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fdata.greeneris.io%2Fv1%2Ffx%2Fofficial
const res = await pay("https://data.greeneris.io/v1/fx/official?currencies=Euro+Zone-Euro%2CJapan-Yen&date=2026-06-30");
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 $0.005 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.005"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://data.greeneris.io/v1/fx/official?currencies=Euro+Zone-Euro%2CJapan-Yen&date=2026-06-30")
    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
3 h agoPassed402356 ms$0.005
7 h agoPassed402323 ms$0.005
11 h agoPassed402181 ms$0.005
15 h agoPassed402183 ms$0.005
19 h agoPassed402176 ms$0.005
Show 10 older checks
23 h agoPassed402368 ms$0.005
27 h agoPassed402180 ms$0.005
31 h agoPassed402175 ms$0.005
35 h agoPassed402175 ms$0.005
39 h agoPassed402175 ms$0.005
43 h agoPassed402176 ms$0.005
47 h agoPassed402187 ms$0.005
2 days agoPassed402336 ms$0.005
2 days agoPassed402333 ms$0.005
2 days agoPassed402183 ms$0.005