Real-Time Crypto Price API - 2026 Comparison
Looking for live cryptocurrency prices? Here's a comparison of the best real-time APIs with WebSocket support.
Top Real-Time Price APIs
| API | Latency | WebSocket | Free Tier |
|---|---|---|---|
| Binance | ~50ms | Yes | Unlimited |
| Coinbase | ~80ms | Yes | Yes |
| OKX | ~60ms | Yes | Yes |
| Kraken | ~100ms | Yes | Limited |
| Bitstamp | ~120ms | Yes | No |
| CoinAPI | ~150ms | Yes | Limited |
WebSocket Implementation Example
// Binance WebSocket - Multiple streams
const ws = new WebSocket('wss://stream.binance.com:9443/stream?streams=btcusdt@trade/ethusdt@trade');
ws.onmessage = (event) => {
const { data } = JSON.parse(event.data);
console.log(`Price: $${data.p}`);
};
// Coinbase WebSocket
const ws2 = new WebSocket('wss://ws-feed.exchange.coinbase.com');
ws2.onopen = () => {
ws2.send(JSON.stringify({
type: 'subscribe',
product_ids: ['BTC-USD', 'ETH-USD'],
channels: ['ticker']
}));
};
When to Use Real-Time vs REST
Use WebSocket When:
- Building trading platforms
- Need sub-second price updates
- High-frequency data needed
- Real-time dashboards
Use REST When:
- Simple price display
- Scheduled updates OK
- Lower traffic applications
- Easier implementation