Rates

{
  "data": {
    "base": "UAH",
    "count": 1,
    "date": "2026-10-09",
    "rates": [
      {
        "currency": "USD",
        "name": "US Dollar",
        "nameUk": "Долар США",
        "numericCode": 840,
        "rate": 44.8526,
        "ratePerUnit": 44.8526,
        "setOn": "2026-10-08",
        "specialConditions": false,
        "units": 1
      }
    ]
  },
  "meta": {
    "cached": false,
    "endpoint": "GET /v1/rates",
    "params": {
      "currency": "USD",
      "date": "2026-10-09"
    },
    "retrievedAt": "2026-10-12T12:00:00.000Z",
    "source": "National Bank of Ukraine open data (bank.gov.ua)",
    "sourceUrl": "https://bank.gov.ua/ua/open-data/api-dev",
    "terms": "Ukrainian public open data: free reuse including commercial use, with mandatory attribution to the source (Law of Ukraine 'On Access to Public Information', art. 10-1; https://bank.gov.ua/ua/open-data). Values are passed through unchanged. Not affiliated with or endorsed by the NBU.",
    "upstreamUrl": "https://bank.gov.ua/..."
  }
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://nbu.navistri.com/v1/rates?currency=USD&date=2026-10-09'

# 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://nbu.navistri.com/v1/rates?currency=USD&date=2026-10-09' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode

// 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 $0.001 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.001" });
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 $0.001 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fnbu.navistri.com%2Fv1%2Frates
const res = await pay("https://nbu.navistri.com/v1/rates?currency=USD&date=2026-10-09");
console.log(res.status, await res.text());

# 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 $0.001 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.001"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://nbu.navistri.com/v1/rates?currency=USD&date=2026-10-09")
    print(res.status_code, res.text)