PredTerminal API
Free REST API for prediction market data. No API key required. Access whale bets, market odds, arbitrage opportunities, and top trader data from Polymarket and Kalshi.
Base URL
https://predterminal.com/api/public
Endpoints
GET
/predictions
Markets, arbitrage opportunities, hot markets, and market leaders. The main data endpoint.
GET
/prediction-whales
Recent whale trades ($10K+) across Polymarket and Kalshi. Returns up to 500 trades.
GET
/predictions/top-wallets
Top 1,000 prediction market traders ranked by profit, volume, win rate, or ROI.
GET
/predictions/market/:id
Detailed data for a single market — orderbook, trades, price history.
Rate Limits
Public API: 60 requests per minute per IP. No authentication required.
Example
curl https://predterminal.com/api/public/prediction-whales?limit=10
WebSocket
Real-time streaming is available via WebSocket. Request a token from /api/public/ws-token, then connect to the WebSocket endpoint. Subscribe to whale bets, market updates, and trade events.
Use Cases
- Trading bots — Monitor whale activity and arbitrage gaps programmatically
- Dashboards — Build custom prediction market dashboards
- AI agents — Feed prediction market data into LLM agents for analysis
- Research — Analyze whale behavior, market efficiency, and trader performance
For AI agent integration, see /llms.txt for structured discovery information.
Embeddable Widget
Add live prediction market odds to your website with one line of HTML. Free, no API key needed.
<iframe src="https://predterminal.com/embed" width="400" height="300" frameborder="0"></iframe>
Shows the top 3 trending markets with live YES/NO odds. Links back to PredTerminal for full data.