polymarket

# Polymarket — Prediction Market Data Query prediction market data from Polymarket using their public REST APIs. All endpoints are read-only and require zero authentication. See `references/api-endpoints.md` for the full endpoint reference with curl examples. ## When to Use - User asks about prediction markets, betting odds, or event probabilities - User wants to know "what are the odds of X happening?" - User asks about Polymarket specifically - User wants market prices, orderbook data, or price history - User asks to monitor or track prediction market movements ## Key Concepts - **Events** contain one or more **Markets** (1:many relationship) - **Markets** are binary outcomes with Yes/No prices between 0.00 and 1.00 - Prices ARE probabilities: price 0.65 means the market thinks 65% likely - `outcomePrices` field: JSON-encoded array like `["0.80", "0.20"]` - `clobTokenIds` field: JSON-encoded array of two token IDs [Yes, No] for price/book queries - `conditionId` field: hex string used for price history queries - Volume is in USDC (US dollars) ## Three Public APIs 1. **Gamma API** at `gamma-api.polymarket.com` — Discovery, search, browsing 2. **CLOB API** at `clob.polymarket.com` — Real-time prices, orderbooks, history 3. **Data API** at `data-api.polymarket.com` — Trades, open interest ## Typical Workflow When a user asks about prediction market odds: 1. **Search** using the Gamma API public-search endpoint with their query 2. **Parse** the response — extract eve...