CCXT prediction market exchanges
Data and APIs
Multi-language exchange library with prediction-market adapters
- Free option
- Polymarket
- Kalshi
- Limitless
Opinion tools
Tools and dashboards built around Opinion, an on-chain prediction market. 6 listed.
6 listings, fullest profiles first
Website checked 6 Nov 2026
Premarket
Arbitrage and odds
Unified event, orderbook and account API documentation
- Polymarket
- Opinion
Morfi
Other tools
Morfi describes markets on subjective debates about what should happen, rather than only contracts on future factual outcomes.
- Opinion
Opinion Open API
Data and APIs
Opinion Labs' HTTP API at openapi.opinion.trade for BNB Chain markets, prices, order books and history, with one API key shared by WebSocket and CLOB SDKs.
- Free option
- Opinion
ArbBets
Arbitrage and odds
Scanner that flags YES/NO price gaps across Polymarket, Kalshi and Opinion (990+ matched pairs), with alerts and a REST API on higher tiers. Does not place trades.
Website did not answer at the last check
- Paid or fee-based
- Polymarket
- Kalshi
- Opinion
Prediction Hunt
Trading terminals
Odds comparison across Polymarket, Kalshi, Predict.fun, PredictIt, ProphetX and Opinion with matched contracts, divergence flags, calculators and a free-tier API. Links out to trade.
Website now points to a different product
- Free and paid
- Polymarket
- Kalshi
- Predict.fun
Tools for other markets
A product is listed here when its own pages name Opinion; that is not an official integration or an endorsement by Opinion. Nobody pays to be listed or for their position. Add a product for free.
Every profile is built from the product's own pages, and Vultax keeps a dated copy of each one. How the directory is made. Companies already listed can manage their profile.