Unified prediction market API for Polymarket, Kalshi and 14 more venues. Normalized prices, order books, cross-venue arbitrage and WebSockets. Free tier.

Predictefy helps prediction market traders find and execute better trades by aggregating markets across platforms into one interface. In private beta we’ve reached 36K+ waitlist signups and 2.2K users. Our data has been cited by Polymarket and Business Insider, and we’re a Superteam grant recipient.