Building on prediction market data? These guides cover the APIs behind Polymarket, Kalshi, Novig and Manifold, and compare them side by side: where the data lives, what needs authentication, and how to go from reading prices to placing orders. Prediction Tape’s own live boards are built on the same public endpoints.
Prediction market APIs compared
Kalshi, Polymarket, Novig and Manifold side by side.
Open →Polymarket API guide
Every base URL, working requests, and how trading authentication works.
Open →Kalshi API guide
Base URLs, working requests, key signing and order endpoints.
Open →Manifold Markets API guide
Free play-money API: endpoints, keys and limits.
Open →Novig API guide
Paper and live hosts, signed keys and endpoints.
Open →