Kalshi streams full order books via DoubleZero for institutional traders

Kalshi, the CFTC-regulated prediction market exchange, is now streaming complete order book data directly to institutional traders through DoubleZero’s decentralized infrastructure. The integration gives algorithmic and high-frequency shops access to Level 1 and Level 2 data without the tedious process of reconstructing order books from public APIs. For Kalshi, which processed over $17B in trading volume in May 2026 alone, the goal is clear: make the platform feel less like a retail curiosity and more like a venue where serious capital can operate at speed. What the integration actually does Kalshi offers a public API, which is fine for checking prices or placing the occasional trade. But if you’re running a quantitative strategy that needs to see every bid and ask updating in real time, rebuilding the full order book from API snapshots is like trying to watch a movie by flipping through screenshots. A 2026 SSRN paper actually documented methods for reconstructing complete Kalshi order books from the free public API, which tells you two things: people wanted the data badly enough to write academic papers about it, and the existing setup was a genuine bottleneck. DoubleZero’s Edge p...