Pay-per-call Setup

npm install x402-fetch viem

import { createWalletClient, http } from "viem";
import { privateKeyToAccount } from "viem/accounts";
import { base } from "viem/chains";
import { wrapFetchWithPayment } from "x402-fetch";

const account = privateKeyToAccount(process.env.PRIVATE_KEY as `0x${string}`);
const client = createWalletClient({ account, chain: base, transport: http() });

// Wrap fetch with x402 payment support
const fetchWithPayment = wrapFetchWithPayment(fetch, client);

// Make a paid call — no API key needed
const res = await fetchWithPayment(
  "https://data-tools.prd.arrays.org/api/v1/crypto/funding-rate?symbol=BTCUSDT"
);

console.log(await res.json());

pip install x402-requests

import os
from x402_requests import X402Session
from eth_account import Account

account = Account.from_key(os.environ["PRIVATE_KEY"])
session = X402Session(account=account, chain="base")

res = session.get(
    "https://data-tools.prd.arrays.org/api/v1/crypto/funding-rate",
    params={"symbol": "BTCUSDT"},
)
print(res.json())