Last updated: March 2026
leaguemate.fyi is an independent, fan-made tool and is not affiliated with, endorsed by, or sponsored by Sleeper or any other fantasy sports platform. Sleeper is a trademark of Sleeper Holdings Inc. All league data displayed on this site is fetched directly from the public Sleeper API on your behalf and is owned by you and Sleeper.
Dynasty player values are sourced from KeepTradeCut. leaguemate.fyi is not affiliated with or endorsed by KeepTradeCut.
By accessing or using leaguemate.fyi (the “Service”), you agree to be bound by these Terms of Service. If you do not agree, please do not use the Service.
leaguemate.fyi is a read-only fantasy football analytics tool. It retrieves publicly available data from the Sleeper API using your Sleeper username, and uses that data to generate personalized dynasty strategy analysis, player recommendations, draft projections, and trade simulations. Optional account creation (via Google OAuth) enables persistent league access and one-tap switching across your leagues. The Service does not interact with your Sleeper account beyond reading publicly available data.
leaguemate.fyi is an independent project and is not affiliated with, partnered with, or approved by Sleeper Holdings Inc. or any of its subsidiaries. Use of the Sleeper API is subject to Sleeper's own terms of service. leaguemate.fyi makes no representations on behalf of Sleeper.
If you use the Service anonymously, your Sleeper username is stored only in your browser's session storage and is never transmitted to our servers. If you create an account, we store your email address, Google account identifier, and linked Sleeper account details (username, user ID, display name, avatar) in our database to provide persistent access. Subscription status is stored to manage Pro plan access. We do not sell personal information. League and roster data is fetched directly from the Sleeper public API on demand and is not persisted on our servers. We may collect anonymous, aggregated usage analytics (e.g. page views) via PostHog to improve the Service.
All analysis, verdicts, projections, and recommendations provided by leaguemate.fyi are generated algorithmically and are intended for informational and entertainment purposes only. They do not constitute professional sports or financial advice. Accuracy is not guaranteed. Fantasy sports involve inherent uncertainty, and no tool can reliably predict player performance or trade outcomes.
The Service is provided “as is” without warranties of any kind. leaguemate.fyi and its operators shall not be liable for any direct, indirect, incidental, or consequential damages arising from your use of or inability to use the Service, including any decisions made based on analysis provided by the Service.
The leaguemate.fyi name, design, and original content are the property of the Service operator. Sleeper, Sleeper-related trademarks, and all associated intellectual property belong to their respective owners. Third-party data sources (including KeepTradeCut dynasty values and FantasyCalc trade data) are subject to their own terms.
These terms may be updated at any time. Continued use of the Service after changes are posted constitutes your acceptance of the revised terms. The “last updated” date at the top of this page will reflect the most recent revision.
Questions about these terms can be directed to gvem@duck.com.