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Get your free API key at dashboard.predexon.com to unlock higher rate limits and all features.

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Welcome to Predexon

Predexon provides a unified API for accessing prediction market data across multiple platforms. Get real-time market data, historical prices, orderbook snapshots, and cross-platform market matching - all through a single, consistent interface.

Quickstart

Get up and running with your first API call in under 5 minutes.

API Reference

Explore the complete API documentation with interactive examples.

Markets Guide

Learn how prediction markets work and how to query them.

Cross-Platform Matching

Discover equivalent markets across Polymarket and Kalshi.

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Key Features

Access Polymarket data through a clean, consistent API. Query markets, get real-time prices, historical candlesticks, and orderbook snapshots.
Find equivalent or related markets across Polymarket and Kalshi. Perfect for arbitrage detection, portfolio diversification, or research.
Track wallet positions, calculate P&L over time, and analyze trading activity for any address.
Access historical candlesticks, volume time series, open interest, and orderbook snapshots for backtesting and analysis.

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Quick Example

Fetch active markets sorted by volume: 
curl -H "x-api-key: YOUR_API_KEY" \
  "https://api.predexon.com/v1/polymarket/markets?status=open&sort=volume&limit=10"

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Supported Platforms

Polymarket

Full data access including markets, orders, activity, positions, and orderbooks.

Kalshi

Cross-platform market matching to find equivalent Kalshi markets.

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