Polymarket data
Predexon indexes Polymarket directly from the Polygon blockchain and our own market-data infrastructure: every market, trade, and price since 2020, plus an always-on recorder capturing every orderbook event tick by tick. No scraping, no sampled snapshots — data accurate to the block.
Query markets and trade history over REST, stream live activity over a mempool-aware WebSocket that runs up to 5 seconds ahead of Polymarket's RTDS, and download tick-level orderbook history as Parquet for research and backtesting.
Full catalog with metadata, outcomes, status, and resolutions
Complete trade history for every market since 2020
Historical and live prices at every granularity
Tick-level book replay — every placement, cancel, and fill
Positions, profit and loss, and trade history per wallet
Leaderboards and signals from the most profitable wallets
curl "https://api.predexon.com/v2/polymarket/markets?search=fed&status=open" \
-H "x-api-key: <your-api-key>"
# Trades for a market
curl "https://api.predexon.com/v2/polymarket/trades?market_slug=<market-slug>" \
-H "x-api-key: <your-api-key>"
# Wallet PnL
curl "https://api.predexon.com/v2/polymarket/wallet/pnl/<address>" \
-H "x-api-key: <your-api-key>"Sign up at dashboard.predexon.com for an API key, then query REST endpoints for markets, trades, prices, and wallets, or connect to the WebSocket for live streams. A free tier is available with no credit card.
Trade and price history is complete since 2020 — every market and trade since the venue launched, indexed from the blockchain. Tick-level orderbook capture has been running continuously since January 2026 and grows every day.
Yes — tick-level orderbook history capturing every placement, update, cancel, and fill since January 2026, downloadable as compressed Parquet and finalized daily through the previous day.
For real-time streaming, yes: Predexon watches the Polygon mempool and pushes pending events before they confirm, up to 5 seconds ahead of Polymarket's RTDS.
Yes. Because Predexon indexes from the chain, every wallet's positions, trade history, and realized/unrealized PnL are available and accurate to the block, plus leaderboards of the most profitable traders.
Tick-level orderbook history, the fastest WebSocket, and blockchain-indexed analytics for every major prediction market — through one clean, predictable API.