Roast your league in Claude or ChatGPT

How to set it up

1. Add the connector

Claude: Settings → Connectors → Add custom connector
ChatGPT: Settings → Apps → Developer mode → Create

Then paste this address:

2. Sign in

It sends you to Fantasy God Mode to sign in, with Google or an email code. That makes your free account. No card.

3. Connect your league

Paste your league link in the chat. Then we run your league's whole history through the engine: every week, every trade and every pickup gets analyzed. That takes about 20 minutes for a league we haven't seen. We email you when it's ready.

4. Once it's ready, ask

Menus named step by step in the setup guide.

Everything that already happened, free

Your league's finished seasons: every trade and pickup graded when it was made, every manager's wins split into skill and luck, and the record book as far back as the platform keeps scores.

Claude's scouting report on every manager in a 12-team league: a paragraph each on drafting, keepers, trades, waiver work and luck over five seasons — Can you give me a scouting report on all the owners in the Gotham League? # Every draft pick, trade, pickup and lineup call from your league's past seasons, graded when it happened. Claude writes a paragraph on each manager: who drafts well, who trades well, who works the wire, and who's just been lucky.

Yeah let's do a deep dive on the Joker. Historically my impression is he's done some dumb moves, but he does have a championship recently too. # A follow up on one guy: his worst move, the trade he made to undo it, and how lucky his title year was (11-3 with 8.1 expected wins).

Things to ask it

Tap one to copy it.

This season, with a plan

$99 a season, up to five leagues, ESPN and Yahoo included. The same chat answers this week's questions, and shows the app's own screens where it can.

Claude answering with the Fantasy God Mode matchup screen: 47% to win, both score curves, a start/sit swap worth +1.4 points of win probability, and both starting lineups — What's my fantasy win probability this week in my Sleeper league, and what should I change in my lineup to raise it? # Same matchup screen as the app: both teams' score curves, your win probability, the swap that raises it, and every starter's projection.

Claude answering with the trade finder: 161 trades where both sides gain, grouped by partner, each with the change in projected wins for you and for them — Can you find me some win-win trades another team would say yes to? I don't want to trade McCaffrey. # Checks every 1-for-1 and 2-for-2 deal with every team. Only shows trades where both sides gain, grouped by the team most likely to say yes.

The trade finder filtered to one player: 65 trades involving Tetairoa McMillan where both sides gain, each showing the projected-wins change for you and for the other team — Can you show me some win win trades involving Tet McMillan in the BB Bowl? # Name a player and it only looks at trades with him in them. Then Claude goes through the list: which offer to start with, an easier one if they say no, and which of your players they actually want.

Claude's write-up of the list: the offer to open with, the easier sell if they balk, and the observation that one bench player is the piece the other team actually wants — Can you show me some win win trades involving Tet McMillan in the BB Bowl? # Name a player and it only looks at trades with him in them. Then Claude goes through the list: which offer to start with, an easier one if they say no, and which of your players they actually want.

Claude answering with the every-league briefing: five league cards with win probability, start/sit swaps and pickups, followed by a written summary of what needs doing — What do I need to do across all my leagues this week? # One card per league with this week's odds and opponent, start/sit swaps, and top pickups (with who to drop). Then Claude writes up what you need to do.

What's free and what's paid?

Free: one Sleeper or Fleaflicker league's finished seasons, in the chat and in the app. A plan ($99 a season) adds this season: win odds and start/sit, trades and pickups priced in projected wins, player rankings, on up to five leagues.

Which Claude and ChatGPT plans work?

Any Claude plan that can add a custom connector, on claude.ai and Claude Desktop. ChatGPT needs Developer mode (Plus, Pro, Business, Enterprise). Claude Code, Cursor and the Gemini CLI work too; they take a personal link from your Account screen in the app.

Which platforms?

Sleeper and Fleaflicker leagues are public, so they connect from a link, free. ESPN and Yahoo need your sign-in there, through the Chrome extension, and come with a plan.

What can it see?

Only what your account sees in the app: your connected leagues, their rosters and results, the stored seasons. It never writes to your league. The only things it can change on your account are the ones you'd ask it to, like connecting a league, and it's told to confirm first.

Are the jokes accurate?

The numbers are your league's: records, scores, and every trade graded by what the projections said when it was made. The jokes are the AI's.

Can I build my own thing on it?

Yes. It's a standard MCP server, so anything that speaks MCP can use it: Claude Code, an agent you write, a script. About thirty tools, every one returning plain JSON with the numbers the app shows.