ToolVet
75trust / 100

Fx History

by eu-verify in Markets & finance

x402 APIPassing, checked 43 min ago

European Central Bank reference exchange rates for any past date or date range (business days since 1999-01-04), via frankfurter.dev. Query: ?date=2026-05-01 for one day, or ?start=2026-05-01&end=2026-05-08 for a daily series (max 366 days), plus ?base=EUR&symbols=USD,GBP (symbols optional -> all). Series responses nest rates by date. Historical data is immutable; served with a 24h cache.

GET
https://data.greeneris.io/v1/fx/history
Price
$0.002
per call in USDC
Uptime
100%
last 30 days
Response time
329 ms
408 ms slowest 5%
Last check
Passed
43 min 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/history

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.

GET https://data.greeneris.io/v1/fx/history?base=EUR&end=2026-05-08&start=2026-05-01&symbols=USD

Parameters

ParameterTypeRequiredDescription
basestringNoBase currency code Default: "EUR".
datestringNoSingle day YYYY-MM-DD (mutually exclusive with start/end)
endstringNoSeries end YYYY-MM-DD (default today, max 366 days after start)
startstringNoSeries start YYYY-MM-DD
symbolsstringNoComma-separated target currencies, max 12 (optional -> all)

Example response

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

{
  "base": "EUR",
  "end_date": "2026-05-08",
  "rates": {
    "2026-04-30": {
      "USD": 1.1702
    },
    "2026-05-04": {
      "USD": 1.17
    },
    "2026-05-05": {
      "USD": 1.1686
    }
  },
  "source": "ECB reference rates via frankfurter.dev (business days, since 1999)",
  "start_date": "2026-04-30"
}

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 'https://data.greeneris.io/v1/fx/history?base=EUR&end=2026-05-08&start=2026-05-01&symbols=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://data.greeneris.io/v1/fx/history?base=EUR&end=2026-05-08&start=2026-05-01&symbols=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 $0.002 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%2Fdata.greeneris.io%2Fv1%2Ffx%2Fhistory
const res = await pay("https://data.greeneris.io/v1/fx/history?base=EUR&end=2026-05-08&start=2026-05-01&symbols=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 $0.002 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.get("https://data.greeneris.io/v1/fx/history?base=EUR&end=2026-05-08&start=2026-05-01&symbols=USD")
    print(res.status_code, res.text)

Security scan

No findings

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Recent checks

WhenResultHTTPTimePrice
43 min agoPassed402408 ms$0.002
5 h agoPassed402188 ms$0.002
9 h agoPassed402344 ms$0.002
14 h agoPassed402371 ms$0.002
18 h agoPassed402177 ms$0.002
Show 10 older checks
22 h agoPassed402343 ms$0.002
26 h agoPassed402374 ms$0.002
30 h agoPassed402480 ms$0.002
34 h agoPassed402182 ms$0.002
38 h agoPassed402382 ms$0.002
41 h agoPassed402177 ms$0.002
45 h agoPassed402371 ms$0.002
2 days agoPassed402329 ms$0.002
2 days agoPassed402328 ms$0.002
2 days agoPassed402323 ms$0.002