Kwery is a unified REST API that delivers normalized historical market data from prediction markets (Polymarket, Kalshi), centralized exchanges (Binance spot and futures), on-chain oracles (Chainlink), and decentralized perpetual exchanges (Hyperliquid). One API key, one consistent schema — no juggling multiple providers, authentication flows, or response formats.
Start Building
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Quickstart — Make your first API call in under 2 minutes. Get an API key, hit an endpoint, and inspect the response.
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Plans & Pricing — The free Basic plan includes 150K credits per month. Upgrade when you need higher throughput or volume.
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API Reference — Full endpoint documentation with parameters, response schemas, and examples for every data type.
Sources
| Source | Data Types | Assets |
|---|---|---|
| Binance Spot | Candles, trades, order book snapshots | BTC, ETH, SOL, XRP |
| Binance Futures | Candles, funding rates, open interest, liquidations | BTC, ETH, SOL, XRP |
| Polymarket | Event markets, outcome prices, volume | Political, sports, crypto, macro events |
| Kalshi | Event contracts, order book, settlement history | Economic indicators, weather, policy, crypto |
| Chainlink | Price feed updates, round data, heartbeat events | BTC, ETH, SOL, XRP |
| Hyperliquid | Candles, funding rates, open interest, liquidations | BTC, ETH, SOL, XRP |
Use Cases
- Backtesting trading strategies — Pull clean OHLCV candles across multiple timeframes and venues to validate systematic strategies against historical data.
- Funding rate arbitrage — Compare perpetual funding rates across Binance Futures and Hyperliquid to identify and backtest basis trading opportunities.
- Liquidation cascade detection — Analyze historical liquidation events alongside price and open interest data to model cascade dynamics.
- Basis trading — Track spot vs. perpetual pricing across exchanges to study convergence patterns and historical carry returns.
- Oracle and MEV research — Examine Chainlink price feed update timing, round-level data, and on-chain oracle latency for MEV and DeFi research.