// Query Polymarket prediction market data — search markets, get prices, orderbooks, and price history. Read-only via public REST APIs, no API key needed.
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| name | polymarket |
| description | Query Polymarket prediction market data — search markets, get prices, orderbooks, and price history. Read-only via public REST APIs, no API key needed. |
| version | 1.0.0 |
| author | Hermes Agent + Teknium |
| tags | ["polymarket","prediction-markets","market-data","trading"] |
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: