Parlay

Sports & Fitness

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Real-time sports betting odds from 21+ sportsbooks across 38+ sports with free tier (1K req/month).

About Parlay

Parlay API is a sports odds API providing real-time odds aggregated from 30+ sources through a single call, along with player props, consensus pricing, arbitrage and +EV detection, live in-play data, historical odds, and prediction-market event data from sources such as Kalshi, Polymarket, and Novig. It offers REST endpoints, WebSocket and SSE streaming for live and full odds feeds, and a public OpenAPI/Swagger spec that can be imported into Postman. The service is designed as a drop-in replacement for the-odds-api's URL surface and Python client, with additional endpoints for its extended features.

Official SDKs are available for Python (via PyPI) and JavaScript/Node (via npm), both including built-in math helpers for devig calculations, Kelly sizing, and American-to-implied-odds conversion, plus async iterators for streaming data. A sandbox mode with synthetic data is available without an API key for testing integration shape, and a source-health endpoint reports per-source data freshness for live-betting use cases.

Pricing is credit-based, with a free tier offering 1,000 credits per month and one polling connection, scaling through Starter, Pro, Business, Enterprise, and Scale tiers priced from $5 to $200 per month, differentiated by monthly credit allowance and the number of concurrent SSE/WebSocket connections. Full odds streaming via WebSocket or SSE requires the Business tier or above. The product is aimed at developers building sports betting tools, arbitrage scanners, odds-comparison content, or live-betting bots, ranging from individual bettors to teams needing high-volume or reseller-level access.

Key features

Real-time sports odds from 30+ sources in a single API call
Player props, consensus, arbitrage, and +EV picks endpoints
Live in-play data via SSE and WebSocket streaming
Cross-book middles detection with hit/miss economics
Source health diagnostic for detecting stale live-data feeds
Prediction-market event discovery for Kalshi, Polymarket, and Novig

Frequently asked questions

Is there a free tier?

Yes, the Free tier includes 1,000 credits/month with no card required, and supports one concurrent polling connection.

How much does it cost compared to alternatives?

Parlay is advertised as 6x cheaper than the-odds-api, with paid tiers ranging from $5/month (20,000 credits) to $200/month (50,000,000 credits).

What SDKs and integrations are available?

Official Python and JavaScript/Node SDKs are available via pip and npm, and a full OpenAPI spec can be imported directly into Postman.

Is it compatible with the-odds-api?

Yes, Parlay is drop-in compatible with TOA's URL surface and query-param authentication, with the Python SDK offering TOA-compatible methods plus extensions.

Who is this API for?

It targets sports bettors, scanners, live-betting bots, and tools/content/reseller businesses, per the tier descriptions ranging from light testing to high-volume teams.

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