This file is self contained. It reads public data only and never writes to the machine. All output is bounded and honest about what could not be fetched.

Tools

markets List PredictIt prediction markets with their leading contract, ranked by that contract's yes price. A yes price is the market's implied probability.
search_markets Search PredictIt markets by keyword, e.g. 'election', 'Fed', 'bitcoin', 'oscars'.
market_detail Every contract in one market with full buy/sell yes and no prices.
contract_price Price and implied probability for one named contract inside a market.
biggest_movers Contracts whose last trade price moved most versus the previous close, across all markets.
market_summary Totals across PredictIt right now — how many markets are open, how many contracts trade — plus the most contested open markets.
arbitrage_check Add up every YES price in each open PredictIt market and flag fields whose total is under $1.00, where buying the whole field could cost less than the payout. Only applies to markets whose outcomes are mutually exclusive.
compare_markets Two to five markets side by side, contract by contract, with today's move on each and which market is the most decided and which is the most open.
search_contracts Search the tradeable contracts across every market by name, with each contract's price, last trade and the market it belongs to.
long_shots Open contracts the market prices as unlikely, cheapest first, with the multiple each one returns if it pays out and the market it sits in.

Usage

npm install
npm run build
node dist/index.js

Data comes from the public PredictIt market data API.

Premium tools

These tools need a license key:

expiry_ladder
spread_analysis

Buy a key at https://mcp-marketplace.io/server/io-github-mrfentmen-predictit-mcp and set it in your MCP client config:

"env": { "MCP_LICENSE_KEY": "mcp_live_..." }

The key is checked against MCP Marketplace, cached for 24 hours, and keeps working offline once one check has succeeded. Every other tool on this server stays free.