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Predexon has three interfaces that work together. Here’s how to choose the right one for your use case.

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At a Glance

Data APITrading APIWebSocket
PurposeMarket data and analyticsOrder placement and executionReal-time event streaming
Base URLapi.predexon.comtrade.predexon.comwss.predexon.com
ProtocolRESTRESTWebSocket
Authx-api-key headerx-api-key headerAPI key in URL path

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Data API

Use the Data API to access market data, analytics, and wallet insights:
  • List and search markets across all platforms
  • Fetch prices, candlesticks, volume, and open interest
  • Get orderbook snapshots
  • Query historical trades and activity
  • Look up wallet profiles, positions, and P&L
  • Access smart money analytics and leaderboards
  • Find cross-platform market matches
The Data API covers multiple platforms including Polymarket, Kalshi, Dflow, Limitless, Opinion, Predict.fun, and Binance.

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Trading API

Use the Trading API to place and manage orders on prediction markets:
  • Create and manage users with managed wallets
  • Place limit and market orders on Polymarket and Predict.fun
  • Cancel orders
  • Check balances
  • Get deposit addresses and withdraw funds
  • Redeem resolved positions
  • Configure partner fees
The Trading API handles all wallet management and transaction signing through Turnkey’s secure key infrastructure. You never need to manage private keys. Currently supports: Polymarket (USDC.e on Polygon) and Predict.fun (USDT on BSC).

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WebSocket

Use the WebSocket for real-time streaming:
  • Live trade events as they happen
  • Pending trades (mempool events, Pro tier)
  • Position activity (splits, merges, redemptions)
  • Market lifecycle events (creation, resolution)
WebSocket requires a Dev plan or higher.