Real-Time Market Data Feeds

StockAPIS delivers real-time prices, full order books, and OHLCV candles from 80+ crypto exchanges, stock markets, brokers, and data providers through one normalized API and WebSocket interface.

Power trading apps, charting tools, execution bots, and analytics dashboards with low-latency market data aggregated from Binance, Coinbase, Kraken, NYSE, Polygon, and dozens more.

The Market Data Challenge

Reliable market data is the foundation of every trading application, but stitching it together yourself is expensive and brittle.

Fragmented Exchange APIs

Every venue (Binance, Coinbase, Kraken, Bybit, OKX) ships its own REST and WebSocket schema
Inconsistent symbol formats, timestamp precision, and field names
Rate limits and auth flows differ on every endpoint
Maintaining 20+ separate integrations consumes entire engineering teams

Latency and Reliability

Self-hosted feed handlers drop messages under load
Reconnect logic and gap recovery are easy to get wrong
A single missed order book update corrupts your local book
Cross-venue clock skew breaks consolidated tape logic

Expensive Direct Feeds

Exchange co-location and direct NYSE/Nasdaq feeds cost thousands per month
Bloomberg and Reuters terminals price out smaller teams
Historical tick data licensing is sold per-venue and per-year
Not practical for prototyping or screening many markets

Inconsistent Data Types

Crypto venues expose trades and depth; equities expose quotes and the tape
OHLCV candle intervals vary (1m, 5m, 1h) and align differently
On-chain, news, and sentiment streams live in entirely separate systems
No single schema to join price, volume, and signal data

Scalability Challenges

Subscribing to thousands of symbols across venues saturates connections
Backfilling history for new symbols is manual and slow
Hard to monitor feed health across dozens of upstream sources
No systematic way to fan out one feed to many downstream consumers

The StockAPIS Solution

StockAPIS provides one normalized API and WebSocket layer over 80+ sources, including crypto exchanges, stock exchanges, brokers, and financial data APIs like Polygon, Alpha Vantage, and Finnhub.

Key Capabilities

Real-Time Trades: Tick-by-tick prints streamed over WebSocket in milliseconds
Full Order Books: L2/L3 depth with incremental updates and snapshot recovery
OHLCV Candles: 1m to 1M intervals, aligned and gap-filled across venues
Consolidated Pricing: Best bid/offer aggregated across multiple exchanges
Historical Backfill: Trades, quotes, and candles from minutes to 10+ years
News and Sentiment: Headlines and scored signals joined to the same symbols
On-Chain Data: Wallet flows and DEX activity alongside CEX prices
Normalized Schema: One symbol format and message shape for every source

Source Coverage

Stream and query market data from multiple venue types:

Binance: Spot, futures, and order book depth for thousands of crypto pairs — see the Binance integration
Coinbase: USD spot markets, trades, and L2 book for major assets
Kraken / Bybit / OKX: Spot and derivatives depth, funding, and OHLCV
NYSE / Nasdaq (via stock exchanges): Quotes, trades, and the consolidated tape
Polygon / Finnhub / Alpha Vantage: Aggregated equities, FX, and historical candles
Bloomberg / Reuters (via financial news): Headlines and reference data
StockTwits / Reddit (via social signals): Sentiment scores per ticker

Note: Available data types, depth levels, and history depend on each source’s licensing and venue.

How It Works

Real-Time Price Stream

Subscribe to live trades over WebSocket:


from stockapis import StockAPIS
 
api = StockAPIS(api_key='your_api_key')
 
# Stream live trades for BTC-USDT on Binance
async for trade in api.platforms.binance.stream_trades(symbol='BTC-USDT'):
    print(f"{trade.timestamp} {trade.symbol}")
    print(f"  Price: ${trade.price:,.2f}  Size: {trade.size}")
    print(f"  Side: {trade.side}")

Consolidated Best Bid/Offer

Aggregate top-of-book across venues:


# Top of book from Binance
binance = api.platforms.binance.get_quote('BTC-USDT')
 
# Top of book from Coinbase
coinbase = api.platforms.coinbase.get_quote('BTC-USD')
 
# Top of book from Kraken
kraken = api.platforms.kraken.get_quote('BTC-USD')
 
# Consolidated best bid / best offer
best_bid = max(binance.bid, coinbase.bid, kraken.bid)
best_ask = min(binance.ask, coinbase.ask, kraken.ask)
 
print(f"Consolidated BBO:")
print(f"  Best Bid: ${best_bid:,.2f}")
print(f"  Best Ask: ${best_ask:,.2f}")
print(f"  Spread:   ${best_ask - best_bid:,.2f}")

Order Book Depth

Pull a full L2 snapshot for execution logic:


# Get L2 order book for ETH-USDT
book = api.platforms.binance.get_order_book(
    symbol='ETH-USDT',
    depth=20
)
 
print(f"\nTop 5 bids:")
for level in book.bids[:5]:
    print(f"  ${level.price:,.2f}  x  {level.size}")
 
print(f"\nTop 5 asks:")
for level in book.asks[:5]:
    print(f"  ${level.price:,.2f}  x  {level.size}")

OHLCV Candles

Fetch aligned candles for charting and indicators:


# Get 1-hour OHLCV candles for the last 24 hours
candles = api.platforms.binance.get_candles(
    symbol='BTC-USDT',
    interval='1h',
    limit=24
)
 
for c in candles:
    print(f"{c.open_time}: O={c.open:,.2f} H={c.high:,.2f} "
          f"L={c.low:,.2f} C={c.close:,.2f} V={c.volume:,.0f}")

Multi-Symbol Subscription

Stream many symbols across venues from one connection:


# Subscribe to a basket of symbols
symbols = [
    ('binance', 'BTC-USDT'),
    ('binance', 'ETH-USDT'),
    ('coinbase', 'SOL-USD')
]
 
async for tick in api.stream_trades(symbols):
    print(f"[{tick.source}] {tick.symbol}: ${tick.price:,.2f}")

Historical Backfill

Backfill candles when onboarding a new symbol:


# Pull 30 days of daily candles for backfill
history = api.platforms.binance.get_candles(
    symbol='BTC-USDT',
    interval='1d',
    start='2026-05-06',
    end='2026-06-05'
)
 
# Compute 30-day return
first_close = history[0].close
last_close = history[-1].close
pct_change = ((last_close - first_close) / first_close) * 100
 
print(f"30d change: {pct_change:.1f}%")
print(f"Range: ${first_close:,.2f} -> ${last_close:,.2f}")

Quick Start


from stockapis import StockAPIS
 
api = StockAPIS(api_key='your_api_key')
 
# Get a real-time quote
quote = api.platforms.binance.get_quote('BTC-USDT')
 
print(f"Bid: ${quote.bid:,.2f}")
print(f"Ask: ${quote.ask:,.2f}")
print(f"Last: ${quote.last:,.2f}")

Ready to build? See the API getting-started guide, browse all supported platforms, check pricing, or contact us for high-volume feed access.