Welcome
Unified prediction market API for Polymarket and Kalshi
PAPI Documentation
PAPI is a unified REST API and SDK for prediction markets. Query Polymarket and Kalshi through a single interface with consistent response schemas, cross-exchange matching, and real-time WebSocket streaming.
Getting Started
Sign up, create an API key, and make your first request.
API Reference
Complete endpoint documentation with interactive playground.
Rust SDK
Unified Rust SDK for querying markets across exchanges.
Supported exchanges
| Exchange | Market Data | WebSocket |
|---|---|---|
| Polymarket | Yes | Yes |
| Kalshi | Yes | Yes |
Base URL
https://api.papi.marketDashboard
https://dashboard.papi.market