Personal Analytics Suite for Yahoo Fantasy Sports

Smart Analytics for Yahoo Fantasy Basketball

Alfred's NBA Fantasy Analyst is a non-commercial, private decision-support tool. It securely connects to the Yahoo Fantasy Sports API to synchronize league rosters, model 9-category head-to-head matchups, and project weekly schedules.

Yahoo API Scope & Security Privacy & Data Policy

Application Capabilities

Built specifically to assist the team owner in weekly lineup decisions and category forecasting.

🔄

Automated Roster Sync

Connects to Yahoo Fantasy Sports using secure OAuth 2.0 to retrieve current team rosters, active players, injury tags, and weekly head-to-head opponent matchups.

📊

9-Category Projections

Evaluates team strengths across PTS, REB, AST, STL, BLK, 3PM, FG%, FT%, and TO using population standard deviation, rolling games, and z-score models.

📅

Two-Week Schedule Planner

Scrapes and aggregates NBA schedules to analyze games played per day (Mon–Sun), highlight off-night streaming advantages, and back-to-back distributions.

🔥

Matchup Heatmaps

Color-coded statistical comparisons versus current weekly opponents to pinpoint category deficits and optimal waiver wire acquisitions.

🛡️

Read-Only Architecture

All API interactions are strictly read-only. The application never performs trades, edits rosters, drops players, or alters league settings on Yahoo Sports.

🔒

Local & Isolated Storage

Operates within a local Docker / Jupyter container. No user data or tokens are stored on public servers or exposed to external cloud services.

Yahoo Developer API Integration

Transparent documentation of OAuth 2.0 authentication and API usage.

OAuth 2.0 & Permissions

Alfred's NBA Fantasy Analyst adheres strictly to the Yahoo Developer Network Guidelines and Yahoo Fantasy Sports API terms of use.

  • ✓
    Scope: Fantasy Sports (Read-Only, fspt-r).
  • ✓
    Endpoints Used: /fantasy/v2/game/nba, /fantasy/v2/league/{league_id}, /fantasy/v2/team/{team_key}/roster
  • ✓
    Authorization Flow: OAuth 2.0 Authorization Code flow with local token management.
  • ✓
    Intended Audience: Personal private use for the league manager.
OAuth2 Token Exchange Flow
# 1. User authorizes read-only access
GET https://api.login.yahoo.com/oauth2/request_auth
    ?client_id={CONSUMER_KEY}
    &redirect_uri=oob
    &response_type=code

# 2. Local container exchanges auth code
POST https://api.login.yahoo.com/oauth2/get_token
    grant_type=authorization_code

# 3. Read-only roster sync request
GET https://fantasysports.yahooapis.com/fantasy/v2/team/{team_id}/roster
    Authorization: Bearer {ACCESS_TOKEN}

Privacy Policy

Last updated: October 25, 2026

1. Information We Access

Alfred's NBA Fantasy Analyst requests authorization through Yahoo OAuth 2.0 solely to access:

  • Basic Yahoo user identification for authentication verification.
  • Fantasy basketball league names, IDs, team names, manager nicknames, and player rosters.

2. How Information is Used

All retrieved fantasy data is used exclusively for generating personal analytics:

  • Computing category averages (points, rebounds, assists, etc.) across active rosters.
  • Evaluating upcoming head-to-head schedule volume for the manager's team.

3. Data Storage & Security

OAuth tokens and roster information are saved locally within the user's private container environment. Tokens are never published, uploaded to public clouds, or transmitted to any third parties.

4. Zero Third-Party Sharing

We do not sell, license, share, or monetize any data obtained from the Yahoo Fantasy Sports API. There are no analytics trackers, tracking cookies, or third-party advertising scripts on this site.

5. Revocation of Access

Users may revoke API access at any time through their Yahoo Account Security Settings under "Recent Activity" and "Connected Apps".

Terms of Service

Last updated: October 25, 2026

1. Acceptance of Terms

By accessing or utilizing Alfred's NBA Fantasy Analyst, you acknowledge that this tool is designed strictly for private, non-commercial sports analytical purposes.

2. Description of Service

Alfred's NBA Fantasy Analyst is an independent desktop and container-based analytics dashboard. It provides mathematical projections and schedule summaries for Yahoo Fantasy Basketball teams.

3. Intellectual Property & Trademarks

Yahoo, Yahoo Sports, and Yahoo Fantasy are registered trademarks of Yahoo Inc. NBA, its member teams, and associated trademarks are properties of NBA Properties, Inc. Alfred's NBA Fantasy Analyst is an independent tool and is not endorsed by or affiliated with Yahoo Inc. or the National Basketball Association.

4. Disclaimer of Warranties

This service is provided "as is" without warranties of any kind. Projections and analytics are for recreational enjoyment and informational purposes only.

5. Developer Contact

For questions regarding Yahoo API compliance or technical details, please contact:

Developer: Alfred (GitHub: @adimaunahan)
Application Repository: nba-fantasy-docker