Search Polymarket prediction markets, where prices express market estimates of event probabilities. Retrieve current prices, trading volume, buy and sell orders, and price history to examine expectations and market movements.
Query Polymarket: markets, prices, orderbooks, history.
Search Polymarket prediction markets and view an event's estimated likelihood as a percentage derived from market prices. Results show the market question, Yes/No prices, and trading volume when available. The skill also retrieves order books listing buy and sell orders, price history, and trade data through public APIs.
Use it to see how likely market participants consider an event, or to find prediction markets related to a topic you follow. You can examine current prices alongside changes over time and the orders available in a market.
The skill only reads public APIs and requires no authentication or API key. It cannot place trades. Percentages are converted from prediction market prices and represent participants' expectations. New markets may have no price history. Supported systems are Linux, macOS, and Windows.
This overview was written by AI (OpenAI Codex) from the public SKILL.md. Check the original below for the exact behavior.
AI rated this skill on four points using only the contents of its SKILL.md. Stars and popularity are not taken into account.
The total counts each point as A = 25, B = 15, C = 5. Rated by AI (OpenAI Codex) as of Oct 19, 2026. Treat it as a guide and read the original before installing.
Review the instructions the agent will receive before you install.
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.
outcomePrices field: JSON-encoded array like ["0.80", "0.20"]clobTokenIds field: JSON-encoded array of two token IDs [Yes, No] for price/book queriesconditionId field: hex string used for price history queriesgamma-api.polymarket.com — Discovery, search, browsingclob.polymarket.com — Real-time prices, orderbooks, historydata-api.polymarket.com — Trades, open interestWhen a user asks about prediction market odds:
Format prices as percentages for readability:
["0.652", "0.348"] becomes "Yes: 65.2%, No: 34.8%"Example: "Will X happen?" — 65.2% Yes ($1.2M volume)
The Gamma API returns outcomePrices, outcomes, and clobTokenIds as JSON strings
inside JSON responses (double-encoded). When processing with Python, parse them with
json.loads(market['outcomePrices']) to get the actual array.
Generous — unlikely to hit for normal usage:
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