alchemy-hello-world

name	alchemy-hello-world
description	Create a minimal Alchemy Web3 example: get ETH balance, fetch NFTs, read token balances. Use when starting blockchain development, testing Alchemy setup, or learning basic blockchain query patterns. Trigger: "alchemy hello world", "alchemy example", "alchemy quick start", "get ETH balance", "fetch NFTs alchemy".
allowed-tools	Read, Write, Edit, Bash(npm:*)
version	1.0.0
license	MIT
author	Jeremy Longshore <[e-mail]>
tags	["saas","blockchain","web3","alchemy","nft"]
compatible-with	claude-code

Alchemy Hello World

Overview

Minimal working examples with the real Alchemy SDK: get ETH balance, fetch NFTs for a wallet, read ERC-20 token balances, and subscribe to pending transactions.

Prerequisites

• Completed alchemy-install-auth setup
• alchemy-sdk installed (npm install alchemy-sdk)
• Valid API key configured

Instructions

Step 1: Get ETH Balance

// src/hello-world/get-balance.ts
import { Alchemy, Network, Utils } from 'alchemy-sdk';

const alchemy = new Alchemy({
  apiKey: process.env.ALCHEMY_API_KEY,
  network: Network.ETH_MAINNET,
});

async function getBalance(address: string) {
  const balanceWei = await alchemy.core.getBalance(address);
  const balanceEth = Utils.formatEther(balanceWei);
  console.log(`Balance of ${address}: ${balanceEth} ETH`);
  return balanceEth;
}

// Query Vitalik's address
getBalance('0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045').catch(console.);