A Yahoo account in the league
Sign in with the Yahoo account that manages your team. League Loom finds the current-season leagues on that account after you sign in.
Your Yahoo league, answered by AI
Connect Yahoo Fantasy to ChatGPT & Claude
League Loom is a free, read-only MCP connector that brings your Yahoo Fantasy football, basketball, baseball and hockey leagues into ChatGPT and Claude.
You sign in on Yahoo's own page and approve read-only access, so League Loom never sees your Yahoo password. Add it on a computer, then ask in Claude's phone app or ChatGPT on the web.
Free connector · ESPN, Sleeper, Fantrax & Yahoo · Works with compatible AI tools
Looking for Claude-only setup steps? See Connect Yahoo Fantasy to Claude.
Looking for the MCP endpoint and tool list? See Yahoo Fantasy MCP server.
Looking for what each platform returns? See Provider and sport compatibility.
Looking for help reconnecting your AI app? See League Loom support.
Last updated
Before you start
What you need for Yahoo
Your team in each league
Football, basketball, baseball and hockey leagues are found together. Check the team selected in each league and remove any league you do not want read.
Realistic data expectations
Yahoo returns rosters, matchups, standings, drafts, available players and recent transactions. Player projections, news, playoff odds and past seasons are not returned, so supply or research those separately.
Get connected
From your league to your AI tool
1
Add League Loom to your AI tool
Add https://leagueloom.com/mcp as a remote connector in your AI tool. Follow the authorization prompt to open the guided setup.
2
Choose Yahoo and sign in
Choose Yahoo, then Connect Yahoo. Sign in on Yahoo's own page and approve read-only access. Your current-season leagues appear; check the team you manage in each.
3
Confirm your teams
Finish authorization and return to your AI conversation. Use the first prompt below to confirm the season and roster before asking about adds.
Remote connector URL
https://leagueloom.com/mcpAdd this URL in your AI tool, then follow the guided setup.
On your phone? Send yourself this setup link to finish on a computer.
Worked example
Turn a category matchup into a waiver question
Illustrative walkthrough for a sample Yahoo basketball league. No real player availability or matchup result is implied.
Confirm the team
Ask the assistant to list your connected Yahoo league, season and team. Correct any mismatch before going on.
Read the matchup
Ask how many categories you are winning and which ones your league counts. Have it flag anything Yahoo did not return.
Compare available players
Ask which available players help the categories you trail and what you would drop. Confirm your league's add limits and waiver timing, then make any move in Yahoo.
More about this connection
Yahoo leagues connect through Yahoo's own sign-in, so setup has no password, cookie or league ID to copy. League Loom asks Yahoo for read-only Fantasy Sports access and brings your current-season league into your AI conversation: scoring and roster settings, rosters with lineup slots and eligible positions, standings, weekly matchups with category wins in category leagues, draft results, available players with Yahoo's rank and percent owned, and recent transactions.
Waiver priority and FAAB balance appear where Yahoo returns them. Player projections, news, playoff odds and past seasons are not returned for Yahoo, so ask the assistant to flag missing details and cite outside research separately. No League Loom tool can change your league; you make roster moves in Yahoo.
Build your own
Build a Yahoo league bot or AI agent
League Loom is also the Yahoo data layer for an agent you build yourself, such as a league Slack bot or a weekly recap. Your code sends the setup token to https://leagueloom.com/mcp, and the model reads your Yahoo league through League Loom's tools, so your code never handles a Yahoo sign-in or calls Yahoo's API directly.
What your agent can read
League settings, rosters, standings, matchups with category wins, draft results, recent transactions and the available-player pool, for current-season Yahoo football, basketball, baseball and hockey leagues.
Yahoo sign-in stays in setup
You sign in with Yahoo once on League Loom's setup page. The sign-in is sealed into your connection token, so your bot never sees a Yahoo password or token.
Start from working code
The build guide has League Loom connection code for the OpenAI Responses API, the Claude API and the Claude Agent SDK.
Build your own fantasy sports AI agent, with code · How a league Slack bot uses League Loom
Before you connect
Questions, answered
Is the Yahoo Fantasy connector free?
League Loom is free, with no subscription or per-league fee. Fair-use request budgets apply. Your chosen AI service has its own account and access requirements. No League Loom tool can change your league; you make roster moves yourself.
Do I need my Yahoo password?
No. You sign in on Yahoo's own page and approve read-only access to Fantasy Sports, so League Loom never sees your Yahoo password. The sign-in Yahoo returns is sealed into your encrypted connection. If Yahoo later replaces it, League Loom keeps the newer one encrypted for up to 400 days so your connection keeps working. You can remove League Loom's access any time in your Yahoo account settings.
Which Yahoo sports and seasons work?
Current-season Yahoo football (NFL), basketball (NBA), baseball (MLB) and hockey (NHL) leagues. Past seasons are not supported. One League Loom connection can hold several Yahoo leagues alongside ESPN, Sleeper and Fantrax ones.
Does it work with Yahoo category and points leagues?
Yes. In head-to-head category leagues, matchups show how many categories each team is winning, and league info lists your categories. Points leagues return their point values, and rotisserie leagues return standings and scoring settings.
Can it change my Yahoo lineup?
No. League Loom asks Yahoo only for read access, and no League Loom tool can change your lineup, roster or account. You make every move in Yahoo.
Can I share a page with my Yahoo league?
Yes. After your AI writes a recap or power ranking, ask for a link to post in the league chat. A Yahoo league's page lasts one day, because Yahoo's terms limit how long its data may be kept; pages for other platforms last 30 days.
Is League Loom an official Yahoo product?
No. League Loom is an independent, free connector that reads Yahoo Fantasy through Yahoo's Fantasy Sports API after you sign in. It is not made or endorsed by Yahoo.
Before you connect a league, read how League Loom is built, what the privacy policy says is stored, the terms of service and the full FAQ, or check the press kit with key facts and who builds it.