Polymarket gives you read-only access to the world's largest prediction market. Browse thousands of active markets on elections, macroeconomic events, sports, crypto, and geopolitics. Fetch real-time prices, order books, spreads, and historical probability charts for any outcome token — all without needing a trading account.
Prediction markets express collective beliefs as probabilities priced between 0 and 1. A price of 0.65 on a "Yes" token means the market currently gives that outcome a 65% chance. This makes Polymarket data useful not just for traders, but for researchers, journalists, and analysts who want to understand how the crowd is pricing specific future events compared to polls, forecasts, or models.
What you can do
- Browse active markets with condition IDs, token IDs, and current prices
- Get real-time bid and ask prices, midpoint prices, and last traded prices
- View full order book depth for any outcome token
- Fetch historical price charts at multiple intervals (1m, 1h, 1d, 1w, 1mo, 1y)
- Calculate estimated fill price for a specific order size
- Check bid-ask spreads, tick sizes, and fee rates
- Batch multiple token queries in a single request
Who it's for
Traders monitoring positions and market depth, researchers studying crowd-based probability forecasting, journalists tracking event odds, data analysts building prediction market datasets, and developers integrating Polymarket data into applications.
How to use it
- Use list_simplified_markets for a quick scan of active markets with prices
- Use get_market with a condition ID for full market details and token IDs
- Use get_order_book with a token ID to inspect liquidity and depth
- Use get_prices_history to chart how probability has changed over time
- Use calculate_market_price to estimate slippage for a specific order size
Getting started
No setup required — all skills use the public read-only market data endpoint.
