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Introduction

This quickstart walks you through your first request to the Bitcoin Data API. Under the hood it’s the Moralis Universal API — every endpoint is the same one EVM and Solana developers already use, just with bitcoin as the chain. You’ll fetch BTC balances and a page of wallet history, then call the xpub utility. The interesting part: the wallet endpoints accept either an address or an xpub as input, so you can drop the API into whichever shape your app already has.

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Prerequisites

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Step 1: Set up your project

mkdir bitcoin-quickstart && cd bitcoin-quickstart
npm init -y

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Step 2: Fetch a BTC balance — by address

Create a file called balance-by-address.js: 
const API_KEY = 'YOUR_API_KEY';
const ADDRESS = 'bc1qar0srrr7xfkvy5l643lydnw9re59gtzzwf5mdq';

async function getBalance() {
  const response = await fetch(
    `https://api.moralis.com/v1/wallets/${ADDRESS}/tokens?chains=bitcoin`,
    { headers: { 'X-API-Key': API_KEY } }
  );

  const data = await response.json();
  console.log(JSON.stringify(data, null, 2));
}

getBalance();
Run it: 
node balance-by-address.js
You should see the native BTC balance for the address.

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Step 3: Fetch the same kind of balance — by xpub

The same endpoint accepts an xpub. Create balance-by-xpub.js: 
const API_KEY = 'YOUR_API_KEY';
const XPUB =
  'xpub6CUGRUonZSQ4TWtTMmzXdrXDtypWKiKrhko4egpiMZbpiaQL2jkwSB1icqYh2cfDfVxdx4df189oLKnC5fSwqPfgyP3hooxujYzAu3fDVmz';

async function getBalance() {
  const response = await fetch(
    `https://api.moralis.com/v1/wallets/${XPUB}/tokens?chains=bitcoin`,
    { headers: { 'X-API-Key': API_KEY } }
  );

  const data = await response.json();
  console.log(JSON.stringify(data, null, 2));
}

getBalance();
The API derives every address from the xpub and aggregates balances for you. No client-side derivation, no extra libraries.

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Step 4: Pull wallet transaction history

const API_KEY = 'YOUR_API_KEY';
const ADDRESS_OR_XPUB = 'bc1qar0srrr7xfkvy5l643lydnw9re59gtzzwf5mdq';

async function getHistory() {
  const response = await fetch(
    `https://api.moralis.com/v1/wallets/${ADDRESS_OR_XPUB}/history?chains=bitcoin&limit=10`,
    { headers: { 'X-API-Key': API_KEY } }
  );

  const data = await response.json();
  console.log(JSON.stringify(data, null, 2));
}

getHistory();
Use the returned cursor to paginate.

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Step 5: Get the current BTC price (with sparkline)

const API_KEY = 'YOUR_API_KEY';

async function getPrice() {
  const [priceRes, sparkRes] = await Promise.all([
    fetch('https://api.moralis.com/v1/chains/bitcoin/tokens/native/price', {
      headers: { 'X-API-Key': API_KEY },
    }),
    fetch(
      'https://api.moralis.com/v1/chains/bitcoin/tokens/native/price/sparkline',
      { headers: { 'X-API-Key': API_KEY } }
    ),
  ]);

  console.log('price:', await priceRes.json());
  console.log('sparkline:', await sparkRes.json());
}

getPrice();

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Step 6: Enumerate the addresses derived from an xpub

If your UI needs to display every address controlled by an xpub (not just query against it), call the utility endpoint: 
const API_KEY = 'YOUR_API_KEY';
const XPUB =
  'xpub6CUGRUonZSQ4TWtTMmzXdrXDtypWKiKrhko4egpiMZbpiaQL2jkwSB1icqYh2cfDfVxdx4df189oLKnC5fSwqPfgyP3hooxujYzAu3fDVmz';

async function getAddresses() {
  const response = await fetch(
    `https://api.moralis.com/v1/chains/bitcoin/wallets/${XPUB}/addresses`,
    { headers: { 'X-API-Key': API_KEY } }
  );

  const data = await response.json();
  console.log(JSON.stringify(data, null, 2));
}

getAddresses();
You’ll get every derived address with its transfer count.

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What’s next