ROSTER·LOCKER Start Free
← roster.locker
Sleeper · NFL · NBA · MLB

The AI assistant your Sleeper leagues have been waiting for

Connect Sleeper with one username — no password, no league-ID hunting — and ask an AI that actually reads your rosters, your scoring, and your matchups. Trade grades, start/sit, waivers, and free live-draft help.

Start free Read the guides
One username → every Sleeper leagueNFL · NBA · MLBDynasty · redraft · best ballFree draft help
No credit card. No passwords — ever. Connect in under a minute.

How to connect your Sleeper league

Sleeper is the fastest platform to connect in Roster Locker — you only need your Sleeper username (the public one on your profile), never a password.

  1. Start free at app.roster.lockerCreate your account and pick the sports you play.
  2. Enter your Sleeper usernameThe same username you log in with — it's public, so that's all we need.
  3. Roster Locker imports every Sleeper league you're inAcross NFL, NBA and MLB in one shot — leagues, rosters, and players, via Sleeper's public API.
  4. Pick your team and start askingTrade ideas, waiver targets, start/sit, dynasty windows — grounded in your actual roster.
Roster Locker never asks for, stores, or scrapes your platform password — it connects through each platform's public or sanctioned API and encrypts anything sensitive before it touches the database.

What one Sleeper username unlocks

One username covers all three Sleeper sports at once — no separate connect for football, basketball and baseball.

  • Trade grades that read both sides' rosters and your league's scoring, plus a read on your trade partner's angle.
  • Start/sit and waiver calls grounded in your bench, byes, and injuries — not generic national rankings.
  • Live draft help — pick-by-pick tracking, on-the-clock push alerts, and free AI pick advice while any of your Sleeper drafts is live.
  • Dynasty tools — contend-or-rebuild reads and rookie-draft targets, with season rollover handled automatically when Sleeper mints a new league ID.

Playing on other platforms too? One Roster Locker account also connects ESPN, Yahoo, Fantrax, MyFantasyLeague, Fleaflicker and FPL.

Built for how you actually play Sleeper

Whether you run a 12-team dynasty superflex, a redraft home league, or a best-ball portfolio, the AI answers in the context of *your* setup. See the format guides for dynasty, redraft and best ball.

Roster Locker is free to start. Paid plans (Pro $7.99, All-Pro $14.99, Hall of Fame $22.99 per month) add more AI credits — but live-draft help is always free and unmetered, on every plan, on every platform.

Frequently asked questions

Do I need my Sleeper password to connect?

No. Roster Locker connects to Sleeper using only your public Sleeper username through Sleeper's public API. We never ask for or store your password.

Which sports does the Sleeper connection cover?

NFL, NBA and MLB. One Sleeper username imports all of your leagues across those three sports in a single step.

Does Roster Locker work with Sleeper dynasty and best-ball leagues?

Yes. It supports dynasty, keeper, redraft and best-ball Sleeper leagues, and it follows Sleeper's season rollover automatically so your dynasty league carries over each year.

Is live draft help really free on Sleeper?

Yes. While any of your Sleeper drafts is upcoming or live, AI pick advice is completely free and unmetered, including live pick-by-pick tracking and on-the-clock alerts.

How much does Roster Locker cost?

It is free to start. Paid plans (Pro, All-Pro and Hall of Fame) add more AI credits, but live-draft help is free on every plan.

One AI for every fantasy league you own.

6 sports, 7 platforms, one AI that reads your actual rosters and scoring. Free to start — and draft-day help is always free.

Start free