Introducing Prediction Markets API

Today, we're adding a new type of data to our platform with the release of Prediction Markets API. This new API provides programmatic access to data from event-based markets, allowing you to track the probabilities of future outcomes.

While our other APIs focus on traditional financial instruments, the Prediction Markets API gives you a direct feed to data from platforms like Polymarket, Kalshi, and others.

What is the Prediction Markets API?

Prediction Markets API is a REST API that delivers data on event contracts. These are markets based on the outcome of real-world events, like elections, economic reports, or regulatory decisions. The API provides a structured way to get information on what markets are available, their current prices (probabilities), and their trading history.

The API offers multiple response formats, including JSON and MessagePack, and follows a clear, resource-oriented structure.

Key Features

• Market Listings: You can list all active and historical markets for any supported exchange. This includes the market's title, a description of its resolution criteria, and its current status.
• Real-time Activity: The API provides endpoints to get the latest trades and quotes for any market, giving you a near-real-time view of trading activity.
• Historical OHLCV Data: For quantitative analysis, you can retrieve historical Open, High, Low, Close, and Volume (OHLCV) data for any market outcome. The API supports a wide range of time periods, from seconds to years.
• Order Book Snapshots: Get the current order book (bids and asks) for a specific market to analyze market depth and liquidity.

Who Will Benefit from This API?

This API is for anyone who needs structured data from prediction markets.

• Quantitative Analysts: You can apply familiar financial analysis techniques to a new asset class. Use the historical OHLCV data to backtest strategies based on event outcomes.
• Developers: Build applications that display prediction market data, create alerting tools for specific market movements, or develop automated trading systems.
• Data Journalists and Researchers: Track public sentiment and the perceived probabilities of political, social, and economic events over time. Use the data to support articles and studies with quantitative information.

Example Use Cases

• Visualizing Political Race Probabilities: A developer could use the /v1/ohlcv/{exchange_id}/{market_id}/history endpoint to fetch daily price data for a market like "Who will win the next presidential election?". This data can then be used to plot a time-series chart showing how the implied probabilities have changed.
• Monitoring Market Volatility: An analyst could monitor the /v1/activity/{exchange_id}/{market_id}/latest endpoint for markets related to upcoming economic reports. A sudden increase in trade volume could indicate a shift in expectations.
• Finding Arbitrage Opportunities: A trading application could poll the /v1/orderbook/{exchange_id}/{market_id}/current endpoint for all outcomes of a single event to identify and act on pricing inefficiencies between "Yes" and "No" contracts.

To get started, you can look at the full Prediction Markets API documentation.