Introduction

Unified API for prediction market data from Kalshi, Polymarket, Limitless, and Pfun

The Delphi Terminal API gives you unified access to prediction market data across multiple exchanges — Kalshi (KLSI), Polymarket (POLY), Limitless, and Pfun — through a single, consistent interface.

What you can build

Trading bots

Access real-time orderbook data and trade history to power automated trading strategies.

Market analytics

Analyze market movements, spreads, and liquidity across exchanges.

Research tools

Search and filter across thousands of prediction markets.

Price feeds

Get live pricing data for any market with WebSocket streaming.

Supported exchanges

Exchange	ID Prefix	Description
Kalshi	klsi_id	US-regulated prediction market exchange
Polymarket	poly_id	Decentralized prediction market platform
Limitless	market_id	Prediction market platform
Pfun	market_id	Prediction market platform

Get started

Quickstart

Get a test API key and make your first request in under a minute.

Authentication

Learn about API keys, rate limits, and error handling.