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Prediction Market Data API

Kwery is a prediction market data API that unifies Polymarket and Kalshi with Binance, Chainlink, and Hyperliquid. Full-depth order books, OHLCV, snapshot-at-timestamp—built for sentiment vs price, backtesting, and cross-venue strategies. The prediction market space did $44B+ in trading volume; get clean data via one REST API.

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What you get

Polymarket & Kalshi in one API
Full order book depth and OHLCV (5m–24h)
Snapshot-at-timestamp for backtesting
Binance, Chainlink, Hyperliquid in same schema
Free tier: 14 days history; Pro: 6 months

Sample request & response

GET /v1/snapshots/{identifier}/at?time=2026-03-04T14:00:00Z

{
  "snapshots": [{
    "time": "2026-03-04T14:00:00Z",
    "mid_price": 0.487,
    "orderbook_up": {
      "bids": [{"price": 0.485, "size": 9012}],
      "asks": [{"price": 0.488, "size": 8731}]
    }
  }]
}

Build on prediction market data

Free tier includes Polymarket and Kalshi. No credit card required.

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