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Predexon API Overview

Predexon is a prediction markets API that solves two key problems: finding equivalent markets across platforms and accessing comprehensive market data for Polymarket and Kalshi.

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What Predexon Provides

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Market Matching API

Find the same markets across Polymarket and Kalshi platforms:
  • Cross-Platform Matching - Provide a market from one platform, get matches from the other
  • Confidence Scoring - Distinguish between exact matches and related markets
  • Active/Closed Filtering - Separate results by market status
  • Batch Operations - Match multiple markets in a single request
Perfect for arbitrage bots, multi-venue monitoring, and cross-platform analytics.

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Markets Data API

Access comprehensive market information:
  • Market Discovery - Search and filter markets by slug, event, tags, status, and volume
  • Historical Orders - Complete order history with time range filtering
  • On-Chain Activity - Track MERGE, SPLIT, and REDEEM operations
  • Market Prices - Current and historical token prices
  • OHLCV Candlesticks - Price data at 1m, 1h, and 1d intervals
  • Wallet Analytics - Realized P&L tracking with flexible time granularity

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Authentication

All requests require an API key passed in the x-api-key header: 
curl -H "x-api-key: YOUR_API_KEY" "https://api.predexon.com/v1/..."
Contact team@predexon.com to request API access.

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Base URLs

  • REST API: https://api.predexon.com/v1

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Why Use Predexon

  • Cross-Platform Intelligence - The only API focused on finding equivalent markets across venues
  • Comprehensive Data - Order history, activity, prices, and candlesticks in one place
  • Production-Ready - Built for reliability and performance
  • Developer-Friendly - Clean REST endpoints with comprehensive documentation

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Get Started

Quickstart

Find matching markets in 5 minutes

Market Matching

Cross-platform market discovery

Polymarket Markets

Search and filter Polymarket markets

Kalshi Endpoints

Kalshi endpoints (coming soon)