Parlay

About Parlay

Parlay API provides real-time and historical sports odds data pulled from more than 30 sportsbooks across 90+ sport keys. Endpoints cover live odds, period markets, and historical data going back to 2005, including over 30 million prop closing lines since 2022. The service also supports prediction market data from Kalshi alongside traditional sportsbook odds, and offers line movement tracking for closing-line analysis.

Access is authenticated via an API key, with a Python client available (pip install parlay-api) and documented REST endpoints for sports odds, live odds with in-play games, and historical/period market data. WebSocket and SSE streaming are available starting at the Business plan tier, with coalescing intervals varying by plan (1s, 0.5s, or raw/uncoalesced). Usage is metered through a credit system, where a single request can consume multiple credits depending on the number of markets and regions requested.

The product targets developers building sports data applications such as odds comparison tools, trackers, spreadsheets, or prop-pick models, including AI agent integrations (drop-in prompts for Claude, GPT, and Cursor, plus llms.txt and agents.json support). A free tier offers 1,000 credits per month without a credit card. Paid self-serve plans do not automatically include redistribution, public display, or commercial-use rights; those require contacting the provider directly.

Key features

• Real-time sports odds across 30+ sportsbooks and 90+ sport keys
• Historical odds data from 2005, plus 30M+ prop closing lines since 2022
• WebSocket and SSE live streaming with coalescing options by plan
• Line movement tracking for closing-line analysis
• Prediction market odds from Kalshi alongside traditional sportsbooks
• Period market and replay endpoints with archived line-state timestamps

Frequently asked questions