- The fastest WebSocket — mempool-aware streams, up to 5 seconds ahead of Polymarket’s RTDS.
- Orderbook tick history — every book update at every granularity, as bulk Parquet.
- Blockchain-indexed analytics — wallet P&L, smart money, and leaderboards, accurate to the block.
Your first call
What’s in this tab
Ticks — orderbook history
New, and the most-requested dataset by quant teams. Raw, tick-level orderbook deltas as bulk Parquet — every update at full resolution across Polymarket, Kalshi, and Opinion. Replay the book at any moment; aggregate to any granularity.
Markets
List markets and events across all venues, plus live lifecycle events (creation, resolution) over WebSocket.
Pricing & Candles
Spot price, OHLCV candlesticks (1m–1d), volume curves, open interest, Binance reference candles, and Chainlink crypto streams.
Orderbooks
Historical orderbook snapshots across venues plus the live L2 WebSocket stream for Polymarket.
Trades
Full historical trade tape (Polymarket, Kalshi) plus live trades and mempool pending-trade signals over WebSocket.
Activity & Positions
On-chain activity (splits, merges, redemptions, NegRisk conversions), position snapshots, and the live activity WebSocket channel.
Wallets & P&L
Wallet profiles, positions, realized + unrealized P&L, similar-wallet discovery, and connected-wallet clusters on Polymarket.
Smart Money & Leaderboards
Profitable-wallet positioning, top holders, smart-activity-per-market, global + per-market leaderboards, cohort stats.
Oracle & Settlement
UMA resolution markets and live oracle + collateral events for tracking how questions resolve.
Backtesting
Replay historical orderbook state, reconcile candles with the trade tape, and backtest signals against the pending-trade leading indicator.
Common recipes
List trending markets
GET /v2/polymarket/markets?sort=volumeSearch & discovery
GET /v2/polymarket/search?q=trumpFetch OHLCV candles
GET /v2/polymarket/candlesticks/{condition_id}Orderbook history
GET /v2/polymarket/orderbooksWallet P&L (free)
GET /v2/polymarket/wallet/pnl/{wallet}Smart-money for a market
GET /v2/polymarket/market/{condition_id}/smart-moneyDownload orderbook ticks
GET /v2/data/ticks/quote → GET /v2/data/ticksStream pending trades
Subscribe with
filters.status: "pending" on the trades channel.Authentication & limits
All endpoints in this tab live onhttps://api.predexon.com and authenticate via the x-api-key header. See Authentication and Rate limits in Start Here for plan details, free-endpoint lists, and best-practice patterns (caching, retries, connection pooling).