One API for Every Prediction Market
Unified REST API, WebSocket, and Trading SDK across Polymarket, Kalshi, Dflow, and more. Ship in minutes, not months.
Trusted by teams at
One API for every prediction market. Predexon gives traders, developers, and quant teams unified REST API, WebSocket, and Trading SDK access across Polymarket, Kalshi, Dflow, and more.
Real-time WebSocket
Streams mempool-level pending trades 3–5 seconds before on-chain confirmation — up to 5+ seconds faster than Polymarket's native feed.
Cross-venue trading SDK
Handles wallet setup, signing, gas, and smart routing across all venues. Write three lines of code, not three months of infrastructure.
Deep historical data
5+ years of complete trade data, full orderbook snapshots, and 99%+ accurate cross-venue market matching — no caps on historical depth.
Real-time WebSocket
Streams mempool-level pending trades 3–5 seconds before on-chain confirmation — up to 5+ seconds faster than Polymarket's native feed.
Cross-venue trading SDK
Handles wallet setup, signing, gas, and smart routing across all venues. Write three lines of code, not three months of infrastructure.
Deep historical data
5+ years of complete trade data, full orderbook snapshots, and 99%+ accurate cross-venue market matching — no caps on historical depth.
One API for Every Prediction Market
Predexon gives traders, developers, and quant teams unified REST API, WebSocket, and Trading SDK access across Polymarket, Kalshi, Dflow, and more. Ship faster, trade smarter, and stop building infrastructure.
One API for Every Prediction Market
Unified REST API, WebSocket, and Trading SDK across Polymarket, Kalshi, Dflow, and more. Replace months of blockchain engineering with an integration you finish in minutes.
One API for Every Prediction Market
Predexon gives traders, developers, and quant teams unified REST API, WebSocket, and Trading SDK access across Polymarket, Kalshi, Dflow, and more. Ship faster, trade smarter, and stop building infrastructure.
Updates
WebSocket mempool feed live
Stream pending trades 3–5 seconds before on-chain confirmation across Polymarket and Kalshi
MAR 10, 2026Cross-venue trading SDK
Execute trades across all venues with wallet setup, signing, gas, and smart routing handled for you
FEB 24, 2026Historical data access
5+ years of full trade history, orderbook snapshots, and 99%+ cross-venue market matching on every plan
FEB 11, 2026Free tier — no card needed
Generate your API key instantly and access core endpoints with unlimited historical data right away
JAN 30, 2026"We went live in a day. Predexon just works — the data is fast and the SDK is clean."
Alex Mercer
TradeFox"The WebSocket feed is 5 seconds ahead of anything else. It's a real edge."
Sara Lindqvist
Quant Trader, RatioPredexon powers over 100+ prediction market teams. From solo devs to quant funds.
Customer stories →