Forex

{
  "data": {
    "asOf": "2026-09-29",
    "base": "MUR",
    "quote": "Mauritian rupees per `unit` of each foreign currency",
    "rates": [
      {
        "buy": 46.7442,
        "code": "USD",
        "currency": "USD 1",
        "mid": 47.5305,
        "sell": 48.3168,
        "unit": 1
      },
      {
        "buy": 29.3135,
        "code": "JPY",
        "currency": "JPY 100",
        "mid": 29.9972,
        "sell": 30.6809,
        "unit": 100
      }
    ],
    "source": "Bank of Mauritius"
  },
  "status": "ok"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://mru-oracle.com/forex'

# 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://mru-oracle.com/forex' \
  | 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%2Fmru-oracle.com%2Fforex
const res = await pay("https://mru-oracle.com/forex");
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://mru-oracle.com/forex")
    print(res.status_code, res.text)