ToolVet
78trust / 100

Fx Reference Rate

by Eckari in Markets & finance

x402 APIPassing, checked 43 min ago

European Central Bank euro foreign exchange reference rate for a pair - the official daily fix used for accounting, invoicing and reporting - latest or any date in the last 90 days. The ECB publishes EUR/XXX only, so inverse and cross rates are computed from the same fix and named in rate_derivation. One fix per TARGET working day, not a tradable market rate. Use when: Convert or report an amount at an official daily rate both sides of a contract can verify against the ECB.

GET
https://api.eckari.com/v1/fx/reference-rate
Price
$0.002
per call in USDC
Uptime
100%
last 30 days
Response time
531 ms
785 ms slowest 5%
Last check
Passed
43 min 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

GET https://api.eckari.com/v1/fx/reference-rate

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://api.eckari.com/v1/fx/reference-rate?base=EUR&quote=USD

Parameters

ParameterTypeRequiredDescription
basestringYesISO 4217 code of the base currency. EUR is always available; other currencies must be in the ECB reference rate list for the selected date.
datestringNoOptional ISO calendar date (YYYY-MM-DD) within the last 90 days. When the ECB published no fix on that date (a TARGET closing day), the latest prior fix is returned with a note.
quotestringYesISO 4217 code of the quote currency. EUR is always available; other currencies must be in the ECB reference rate list for the selected date.

Example response

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

{
  "data": {
    "base": "EUR",
    "note": "no ECB fix published for today yet (weekend, TARGET closing day, or before the ~16:00 CET publication); the latest published fix is returned",
    "published_pairs_used": [
      "EUR/USD"
    ],
    "quote": "USD",
    "rate": "1.159300",
    "rate_date": "2026-08-17",
    "rate_derivation": "published",
    "rate_kind": "reference"
  },
  "meta": {
    "capability": "fx.reference_rate",
    "freshness": "near_live",
    "source": "ecb_fx",
    "version": "2.1.0"
  }
}

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://api.eckari.com/v1/fx/reference-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://api.eckari.com/v1/fx/reference-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 $0.002 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%2Fapi.eckari.com%2Fv1%2Ffx%2Freference-rate
const res = await pay("https://api.eckari.com/v1/fx/reference-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 $0.002 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://api.eckari.com/v1/fx/reference-rate?base=EUR&quote=USD")
    print(res.status_code, res.text)

Security scan

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Recent checks

WhenResultHTTPTimePrice
43 min agoPassed402785 ms$0.002
5 h agoPassed402570 ms$0.002
9 h agoPassed402421 ms$0.002
13 h agoPassed402569 ms$0.002
18 h agoPassed402727 ms$0.002
Show 10 older checks
22 h agoPassed402536 ms$0.002
26 h agoPassed402628 ms$0.002
30 h agoPassed402482 ms$0.002
34 h agoPassed402386 ms$0.002
38 h agoPassed402442 ms$0.002
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2 days agoPassed402545 ms$0.002
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2 days agoPassed402400 ms$0.002