Sleeper vs Yahoo Fantasy Sports API (2026)
Short answer: Sleeper scores clearly higher overall (64 vs 39). Yahoo Fantasy Sports API is the better pick for apps that read or manage a user's Yahoo fantasy football, baseball, basketball or hockey leagues, rosters and matchups through OAuth.
From public data checked . How we know
Choose Sleeper if you…
Fantasy platform
Best for: Hobby and community tools that read Sleeper fantasy football leagues, rosters, drafts and matchups without needing a key.
- ✓ want to start on a free tier
- ✓ value a large open-source ecosystem of wrappers and examples
- ✓ care most about what developers report in practice
Not ideal for: Commercial products without a licence, non-NFL sports, or anyone needing a stats feed rather than fantasy league data.
What developers say
Free, read-only fantasy football API widely used by hobbyists for league websites, Google Sheets exports, power rankings, draft and waiver analysis, plus wrappers in Python and Ruby and MCP servers. Easy to start with and many repos build on it. Complaints: no player scoring or projections, hard to get bench totals, non-commercial licence.
Choose Yahoo Fantasy Sports API if you…
Fantasy platform
Best for: Apps that read or manage a user's Yahoo fantasy football, baseball, basketball or hockey leagues, rosters and matchups through OAuth.
- ✓ need Baseball, Basketball, Ice hockey
Not ideal for: General sports stats, scores or odds; the API exposes Yahoo fantasy data only, scoped to leagues the authorising user belongs to.
What developers say
Used by hobbyists to pull their own fantasy league data for dashboards, bots and analytics, with community wrappers in Node, Go and Python. Developers struggle with OAuth setup, XML-only responses, thin docs and missing fields such as projections or stats. Access is limited to approved apps and rate-limited.
Side by side
| Sleeper | Yahoo Fantasy Sports API | |
|---|---|---|
| SportDex Score | 64/100 (#10) | 39/100 (#112) |
| Popularity | 59 | 55 |
| Community & reliability | 85 | 46 |
| Transparency | 60 | 15 |
| Developer experience | 52 | 24 |
| Type | Fantasy platform | Fantasy platform |
| Starting price | Free tier | Price not public |
| Free tier | Yes | Not disclosed |
| Free trial | Not stated | Not stated |
| Sports | American football | American football, Baseball, Basketball, Ice hockey |
| Data | Fantasy, Team stats | Fantasy, Player stats, Team stats |
| Delivery | Polling only (REST) | Polling only (REST) |
| Protocols | REST | REST |
| Live / in-play | Not disclosed | Not disclosed |
| Commercial use | Commercial: Licence required | Commercial: not disclosed |
| Betting products | Betting: not disclosed | Betting: not disclosed |
| Documentation | Docs | Docs |
| Developer discussions | 44 | 47 |
| GitHub repos | 389 | 36 |
| Community tone | Mostly positive | Mixed |
Empty fields mean the provider does not say, not that the feature is missing.
Quick answers
- Is Sleeper or Yahoo Fantasy Sports API better?
- Sleeper scores clearly higher overall (64 vs 39). Yahoo Fantasy Sports API is the better pick for apps that read or manage a user's Yahoo fantasy football, baseball, basketball or hockey leagues, rosters and matchups through OAuth.
- Which is cheaper, Sleeper or Yahoo Fantasy Sports API?
- Sleeper: Free tier. Yahoo Fantasy Sports API: Price not public. Entry plans differ in limits and coverage, so compare what each plan includes.
- Do Sleeper and Yahoo Fantasy Sports API have a free tier?
- Sleeper: yes. Yahoo Fantasy Sports API: not disclosed.