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Fantasy platform · United States

Yahoo Fantasy Sports API logo

Yahoo Fantasy Sports API

Yahoo's REST API exposing fantasy football, baseball, basketball and hockey data: leagues, teams, players, rosters, transactions and matchups. Requires OAuth 2.0 and an approved developer application.

Facts verified against the provider's site on

Commercial use: not disclosedBetting use: not disclosedMixed
Visit official siteOpen API docsCompare
Featured in:💬 Most discussed sports APIs
39

SportDex Score

#112 of 233 sports APIs

See the full ranking →
Popularity
55

Brand demand, developer discussions, GitHub repos and videos

Community & reliability
46

Tone of public discussions, liked vs criticised points, reliability complaints; based on 25+ public discussions.

Transparency
15

Public prices, docs, terms and coverage you can check before calling sales

Developer experience
24

Free access, docs, SDKs, OpenAPI, sandbox, realtime delivery, ecosystem

Reliability reports from developers: Missing data such as projections and rankings.

Computed from public data only; uptime and latency are not measured yet. Enterprise feeds that sell by contract score lower on transparency by design. How the score works

Starting price
Not public
Free access
Not disclosed
Sports
4 (American football, Baseball…)
Live data
Not disclosed
Delivery
Polling only (REST)
Discussions
47 threads
GitHub adoption
36 repos

Best for

Apps that read or manage a user's Yahoo fantasy football, baseball, basketball or hockey leagues, rosters and matchups through OAuth.

League and roster toolsFantasy lineup helpersMatchup trackers

Not ideal for

General sports stats, scores or odds; the API exposes Yahoo fantasy data only, scoped to leagues the authorising user belongs to.

Limitations to check

  • − Requires an application, review and approval
  • − OAuth 2.0 only
  • − Covers four sports: football, baseball, basketball, hockey
  • − Products must credit Yahoo Fantasy with a backlink
  • − No pricing stated

Written from the provider's own pages (source).

Last checked 2026-11-03

Yahoo Fantasy Sports API at a glance

What is Yahoo Fantasy Sports API best for?
Apps that read or manage a user's Yahoo fantasy football, baseball, basketball or hockey leagues, rosters and matchups through OAuth. Not ideal for: General sports stats, scores or odds; the API exposes Yahoo fantasy data only, scoped to leagues the authorising user belongs to.
How much does Yahoo Fantasy Sports API cost?
Yahoo Fantasy Sports API does not publish prices on the pages we checked.
Does Yahoo Fantasy Sports API have a free tier?
Yahoo Fantasy Sports API does not say whether a free tier exists. Check https://developer.yahoo.com/fantasysports/.
What does Yahoo Fantasy Sports API cover?
Yahoo Fantasy Sports API is a fantasy platform. Its sports: American football, Baseball, Basketball, Ice hockey; data: Fantasy, Player stats, Team stats.
Does Yahoo Fantasy Sports API have a WebSocket or streaming API?
No streaming is listed. Yahoo Fantasy Sports API delivers data by REST, so you poll for updates.
What do developers say about Yahoo Fantasy Sports API?
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.
What are the alternatives to Yahoo Fantasy Sports API?
Close alternatives in the SportDex catalog: SportsDataIO, Entity Sport, FantasyPros API, Fantasy Nerds API, API-Sports / API-Football.

Commercial decision

Pricing & plan limits

No public price list. Check the provider site.

Access via application and review; no pricing stated. Formats not verified on page (historically XML/JSON). Data is user-league-scoped via OAuth.

Before choosing a paid plan, confirm

• What counts as one request (per call, per market, per region?)

• What happens when you exceed the quota: blocked or billed

• Whether live and historical data are on your plan

• Whether your use (public app, betting, resale) is licensed

The critical question

Data coverage

Sports
American footballBaseballBasketballIce hockey
Data types
FantasyPlayer statsTeam stats
Key competitions
Not disclosed
Competitions
Not disclosed
Live / in-play
Not disclosed
Women's competitions
Not disclosed
Betting markets
Not disclosed
Bookmaker regions
Not disclosed
Bookmakers
Not disclosed
History depth
Not disclosed
Update frequency
Not disclosed
Name languages
Not disclosed
ID mapping
Not disclosed

Coverage often depends on the plan; confirm the exact league and season on your plan.

Before you build

Usage rights & access

Commercial use
Not disclosed
Betting products
Not disclosed
Redistribution
Not disclosed
Storing data
Not disclosed
Attribution
Required
Logos & photos
Not disclosed
Who can buy
Individuals, Companiessource
Verification (KYC)
Required
Not available in
Not disclosed
Only available in
Not disclosed

Access requires an application, review and approval plus agreement to the API Access and Use Agreement; OAuth 2.0 only.

Developer-ready evaluation

Integration & documentation

Protocols
REST
Formats
XML, JSON
Authentication
oauth
SDKs
Not disclosed
OpenAPI spec
Not disclosed
Claimed latency
Not disclosed
Status page
Not disclosed
Sandbox / test keys
Not disclosed
Support
Not disclosed
SLA uptime
Not disclosed
Preview brief
# Integration brief: Yahoo Fantasy Sports API

Goal: build a feature on Yahoo Fantasy Sports API data. Use only the official documentation below as the source of truth.

## Known facts (from SportDex, verify before relying on them)
- Website: https://developer.yahoo.com/fantasysports/
- Docs: https://sports.yahoo.com/developer/docs/
- Sports: American football, Baseball, Basketball, Ice hockey
- Data: Fantasy, Player stats, Team stats
- Protocols: REST; formats: xml, json
- Auth: oauth
- Free plan: none listed
- Note: Access via application and review; no pricing stated. Formats not verified on page (historically XML/JSON). Data is user-league-scoped via OAuth.

## Verify before writing code
- pricing and request limits
- live update frequency
- whether commercial use is allowed on the plan you pick
- exact endpoint paths, parameters and response fields (read the official docs, do not guess)

## Implementation rules
- Keep the API key on the server (environment variable, backend route or edge function); never ship it to the browser.
- Cache responses and respect rate limits; count how many requests each screen triggers.
- Handle errors explicitly: invalid key, quota exceeded (429), missing fields, empty fixtures, timeouts.
- Start with one demo request and log the raw response before building UI on assumed field names.

Data quality signals

Data source & company

Official partners
Not disclosed
How data is collected
official feed
Certifications
Not disclosed
Payment methods
Not disclosed
Minimum contract
Not disclosed
Country
United States
Founded
Not disclosed

Reddit · Hacker News · Stack Overflow · GitHub · YouTube

What developers say

Mixeddocscoveragelegal

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.

Praised for

  • Access to own league, roster and transaction data
  • Community wrappers in several languages
  • Active hobby repos for analytics and bots

Complaints

  • OAuth flow is confusing and poorly documented
  • Responses are XML by default
  • Missing data such as projections and rankings
  • Rate limits and non-commercial terms

Our summary of public discussions, not a rating. Vendor posts are not counted as user opinion.

Discussions

Shortlist next steps

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Sleeper vs Yahoo Fantasy Sports API

Evidence & transparency

Official sources

Facts were extracted from the provider's own pages on 2026-11-03. Empty fields mean the provider does not say, not that the feature is missing. How we know