Top Real-Time Data Providers
| Provider | Latency | Assets | WebSocket | Free Tier |
|---|---|---|---|---|
| Binance | <50ms | 500+ | ✓ | Unlimited |
| Coinbase | <100ms | 200+ | ✓ | Limited |
| CoinGecko | <1s | 15,000+ | ✓ | 10K/mo |
| CoinMarketCap | <1s | 12,000+ | ✓ | 10K/mo |
| Alchemy | <100ms | 20+ chains | ✓ | 20M units |
WebSocket Example
Connect to Binance WebSocket for real-time prices:
// Binance WebSocket stream
const ws = new WebSocket('wss://stream.binance.com:9443/ws/btcusdt@trade')
ws.onmessage = (event) => {
const trade = JSON.parse(event.data)
console.log(`BTC price: $${trade.p}`)
}Use Cases
- Trading bots
- Price alerts
- Portfolio dashboards
- Arbitrage detection
- Market analytics
Provider Recommendations
- Trading Bots - Binance or Coinbase WebSocket
- Portfolio Apps - CoinGecko or CoinMarketCap
- dApps - Alchemy or QuickNode
💡 Best Practice: Use multiple data sources for critical applications to prevent single points of failure.
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