Gemini Prediction Markets API
API for trading prediction market contracts on Gemini.
Note: Only fields documented in this specification are considered stable. Undocumented fields in API responses may change or be removed without notice.
Tags
Markets
Public endpoints for browsing prediction markets.
Market Data: For real-time order book and market data, use the existing APIs with the contract's
instrumentSymbol (e.g., GEMI-FEDJAN26-DN25):
- Get Current Order Book - View bids and asks
- Get Ticker - Recent trading activity
- WebSocket Market Data - Real-time streaming updates
Trading
Authenticated endpoints for placing and managing orders
Positions
Authenticated endpoints for viewing positions and order history