What is Adjacent?

Adjacent (also operating as Adjacent News) is an indexing, benchmarking, and market data aggregation platform built for the prediction market and event contract ecosystem. The platform normalizes fragmented data streams from multiple decentralized and regulated venues—including Polymarket, Kalshi, Manifold, and Metaculus—into a single, unified API feed. Through its developer infrastructure, Adjacent delivers cross-platform reference rates, open-high-low-close (OHLC) historical price action, semantic market searches via vector embeddings, and custom indices tracking political and economic sentiment.