$0.005
per call · USD Coin on Base
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.
Endpoint
GET https://data.greeneris.io/v1/fx/official4
Calls / 30d
1
Unique payers / 30d
Sep 6
Last called
exact
Payment scheme
Call this service
import { wrapFetchWithPayment } from "@x402/fetch";
import { privateKeyToAccount } from "viem/accounts";
const account = privateKeyToAccount(process.env.PRIVATE_KEY);
const fetchWithPay = wrapFetchWithPayment(fetch, account);
const res = await fetchWithPay("https://data.greeneris.io/v1/fx/official", {
method: "GET",
});
const data = await res.json();curl -X GET \
"https://data.greeneris.io/v1/fx/official?currencies=Euro+Zone-Euro%2CJapan-Yen&date=2026-06-30" \
-H "X-PAYMENT: <signed x402 payment>"Example response
{
"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)"
}Payment details
0x6ab8efe305cce67daa48c97bde29c04402822dffUSD Coin · 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913Is this your API?
Pin it to the top of Social & Community and the homepage with a featured placement.
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