prediction-market-mcp

Prediction Market Data MCP Server

Give your AI agent access to real-time prediction market data from Polymarket & Kalshi.

An MCP (Model Context Protocol) server that connects Claude, ChatGPT, and other AI agents to the Prediction Market Data API — 4,800+ markets, arbitrage detection, cross-platform matching, and strategy signals.

Quick Setup (Claude Desktop)

• Get a free API key at RapidAPI

• Add to your claude_desktop_config.json:

{
  "mcpServers": {
    "prediction-market-data": {
      "command": "npx",
      "args": ["-y", "prediction-market-mcp"],
      "env": {
        "PREDICTION_MARKET_API_KEY": "your-rapidapi-key"
      }
    }
  }
}

• Restart Claude Desktop. You can now ask things like:
  • "What are the top prediction markets right now?"
  • "Find arbitrage opportunities on Polymarket"
  • "Show me cross-platform price differences for political markets"
  • "What are the best-performing trading strategies?"

Available Tools

Tool	Description
search_markets	Search 4,800+ markets by query, platform, category, volume
get_market	Get a specific market by Polymarket conditionId or Kalshi ticker
list_categories	List all categories with per-platform market counts
find_arbitrage	Find single-platform arb opportunities (YES + NO < $1)
find_cross_platform_arbitrage	Find same market priced differently across platforms
calculate_arbitrage	Calculate exact profit with fee breakdown
get_top_strategies	Top strategies from 24/7 forward-testing (864 combos, 82% win rate)
get_recent_triggers	Recent strategy trigger events with profit/loss data

Platform Coverage

• Polymarket — Crypto-native prediction market (largest by volume)
• Kalshi — CFTC-regulated US prediction market exchange

Other MCP Clients

For any MCP-compatible client, run:

npx prediction-market-mcp

Set the PREDICTION_MARKET_API_KEY environment variable to your RapidAPI key.

API Key

Get your free key (50 requests/day) at: https://rapidapi.com/illgottengainsss/api/prediction-market-data

Paid plans available for higher limits ($14.99-$149.99/mo).

License

MIT