US Stock Market Data API
Covering NYSE, NASDAQ & AMEX with 12,000+ symbols. WebSocket millisecond-level streaming for quant trading and market terminals.
Market Coverage
| Exchange / Category | Symbols | Data Types | Frequency |
|---|---|---|---|
| NYSE (New York Stock Exchange) | ~4,200+ | Tick / Trade / Depth | Real-time |
| NASDAQ | ~5,500+ | Tick / Trade / Depth | Real-time |
| AMEX | ~2,700+ | Tick / Trade | Real-time |
Technical Specs
Code Examples
Quick Start
# pip install websocket-client
import websocket
import json
api_key = 'your_api_key_here'
ws_url = f'wss://api.tickdb.ai/v1/realtime?api_key={api_key}'
def on_open(ws):
ws.send(json.dumps({
'cmd': 'subscribe',
'data': {
'channel': 'ticker',
'symbols': ['AAPL.US', 'TSLA.US', 'MSFT.US']
}
}))
def on_message(ws, message):
data = json.loads(message)
print('Received:', data)
ws = websocket.WebSocketApp(ws_url, on_open=on_open, on_message=on_message)
ws.run_forever() Full documentation available at API Documentation
Comparison
Comparison based on publicly available documentation as of April 2026. Please refer to each provider for the latest information.
| Provider | Real-time | WebSocket | Depth | Coverage | Chinese Docs | Price |
|---|---|---|---|---|---|---|
| Polygon.io Leading US stock data provider | โ Real-time | โ Robust | โ Crypto L2 | US stocks/options/forex/crypto | โ English only | Free limited; from $29/mo |
| Alpha Vantage Legacy financial data API | โ ๏ธ Real-time from $99/mo; free 15min delay | โ REST only | โ | US stocks/forex/crypto/indicators | โ English only | Free 25/day; from $49.99/mo |
| TickDB Unified multi-market API | โ Sub-100ms | โ | โ L2 (paid) | US/HK/CN/Forex/Crypto | โ Chinese-first | Free tier; paid unlocks all |
Use Cases
Quant Backtesting
High-precision historical tick data replay for strategy validation and parameter optimization.
Trading Terminal
Real-time streaming to power custom trading UIs with millisecond price updates.
Cross-market Monitoring
Subscribe to US-listed Chinese ADRs and HK stocks simultaneously to monitor price spreads.
Choose Your Plan
All paid plans support monthly / quarterly / semi-annual / annual billing. Prices below are annual (20% off)
Free
- Selected symbols*
- 5 concurrent subscriptions
- Real-time quotes
- Real-time K-line
- 1 WebSocket connection
- 30 req/min API calls
- Email support
Starter
Billed annually $948
- All symbols
- 50 concurrent subscriptions
- Real-time quotes
- Real-time K-line
- Real-time order book
- Real-time trades
- Night session data
- 1 year historical data
- 1 WebSocket connection
- 60 req/min API calls
- Email support
Professional
Billed annually $2868
- All symbols
- 300 concurrent subscriptions
- Real-time quotes
- Real-time K-line
- Real-time order book
- Real-time trades
- Night session data
- 3 years historical data
- 3 WebSocket connections
- 600 req/min API calls
- Telegram support
Enterprise
Billed annually $8628
- All symbols
- 5000+ concurrent subscriptions
- Real-time quotes
- Real-time K-line
- Real-time order book
- Real-time trades
- Night session data
- 10 years historical data
- 10 WebSocket connections
- 1800+ req/min API calls
- Telegram support
FAQ
What is the latency for TickDB US stock data?
Which US exchanges are covered?
Can I get US stock data on the free plan?
How does TickDB compare to Polygon.io?
How do I get started?
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