Bet your fantasy league

Leagues are public on ShadowBets, like they are on Sleeper. Paste the numeric league id from your Sleeper league URL (the digits after /league/). Linking fetches the league from Sleeper and stores it here so your leaguemates can claim rosters, chat, and settle side pots. Linking grants no special powers — commissioner controls unlock when the league's Sleeper commissioner claims and verifies their own roster. Sign-in is one gasless SIWE signature — the same one that unlocks market chat.