CoinGecko API

// Fetch current cryptocurrency prices
const headers = { 'X-Api-Key': 'YOUR_API_KEY' };
const response = await fetch(`https://www.coingecko.com/api`, { headers });
const data = await response.json();
const coins = data.data || data.coins || data;
const top5 = Array.isArray(coins) ? coins.slice(0, 5) : [coins];
top5.forEach(coin => {
  console.log(`${coin.name || coin.symbol}: $${coin.price || coin.current_price}`);
});

// Track portfolio value with current prices
const headers = { 'X-Api-Key': 'YOUR_API_KEY' };
const holdings = { BTC: 0.5, ETH: 2.0 };
const response = await fetch(`https://www.coingecko.com/api`, { headers });
const data = await response.json();
let total = 0;
Object.entries(holdings).forEach(([symbol, amount]) => {
  const price = data[symbol]?.usd || 0;
  total += price * amount;
  console.log(`${symbol}: ${amount} x $${price} = $${(price * amount).toFixed(2)}`);
});
console.log(`Total portfolio value: $${total.toFixed(2)}`);

// Monitor price and trigger alerts
const headers = { 'X-Api-Key': 'YOUR_API_KEY' };
const ALERT_THRESHOLD = 50000;
const response = await fetch(`https://www.coingecko.com/api`, { headers });
const data = await response.json();
const price = data.price || data.bitcoin?.usd || 0;
console.log(`Current BTC price: $${price}`);
if (price > ALERT_THRESHOLD) {
  console.log('🚀 Price alert: BTC is above $' + ALERT_THRESHOLD);
}