Sleeper API
Free fantasy football API with no authentication required
Overview
The Sleeper API is a free, no-authentication-required API for fantasy football data, providing access to league data, rosters, matchups, transactions, drafts, and player information. Sleeper has become one of the most popular fantasy football platforms, and its open API enables developers to build custom tools, bots, draft boards, and analytics applications. The API also provides NFL news, trending players, and projection data.
Pros
- Completely free with no auth required
- Excellent documentation
- WebSocket support for real-time updates
- Active fantasy community
- Draft and trade data
- No rate limit configuration needed
Cons
- Fantasy-focused only (no odds or betting)
- Limited to NFL and NBA
- No official SDK
- Soft rate limits can be unpredictable
- No historical data beyond recent seasons
Best For
Not Ideal For
Specifications
SDKs
Leagues
Our Verdict
Sleeper API is a solid choice for fantasy football tools and draft board applications, with an overall score of 8.4/10. While it performs well in most areas, consider fantasy-focused only (no odds or betting) when making your decision.
Coverage
Sports Supported
Leagues & Competitions
2 leagues and competitions covered
Developer Experience
API Paradigms
SDKs
Documentation
Commercial Terms
Pricing Plans
Free
1,000/minute
- All endpoints
- League data
- Player data
- Draft data
- No authentication required
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