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WebSocketCrypto

Binance USD-M Futures WebSocket Market Streams

Binance USD-M Futures WebSocket Market Streams is a websocket from Binance providing crypto data. Free real-time WebSocket market data feeds for Binance USDⓈ-M (USD-margined) perpetual futures, covering mark price, funding rate, aggregate trades, candles, and order books. Polymarket bots use it to track BTC/ETH/altcoin perp prices and funding that lead spot and drive pricing of hourly/daily "will BTC close above $X" crypto markets.

At a glance

ProviderBinance
TypeWebSocket
CategoryCrypto
Real-timeYes — streaming
AuthNone — open endpoint
PricingFree (public market data streams; no API key required) — Public market data streams: Free, no authentication required, User data streams: Free, requires API key (account-scoped, not market data)

What data it provides

  • Mark price stream with funding rate and next funding time (1s or 3s updates)
  • Aggregate trade (aggTrade) stream of executed perp trades
  • Kline/candlestick streams (OHLC) across standard intervals
  • Book ticker (best bid/ask) and mini/full ticker streams
  • Partial and differential (diff) depth / order-book streams
  • Liquidation order, index price, and contract info streams

Features

  • Base endpoint wss://fstream.binance.com (data-only mirror at data-stream.binance.vision)
  • Sub-second mark price updates (markPrice@1s) for low-latency perp tracking
  • Up to 1,024 streams per connection; ~300 connections per 5 min per IP
  • Connection valid up to 24h; server pings every 3 min (pong required)
  • No SDK required (raw WS) but official binance-connector libraries exist for Python/Node/Java
  • Broad coverage of all USDⓈ-M perpetual and delivery futures symbols

Links

Use it in a bot

Other crypto data sources

Listed, not endorsed. Pricing and capabilities change without notice — check the provider's own documentation before you depend on anything here. Browse the full data resources directory or the strategy database.
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