Cap space, contracts, and value
Connect Claude, ChatGPT, or another MCP-compatible AI to your Fantrax league for draft prep that speaks in cap space rather than draft rounds.
League Loom reads your league's scoring and your roster with each player's salary, which most AI tools cannot see at all. The assistant asks you for the cap rules no API exposes, then prices your targets with a maximum bid for each one.
Pulled your Fantrax roster and salaries. With the cap total you gave me:
| Item | Amount | Note |
|---|---|---|
| Committed | $142.0M | 11 players |
| Cap room | $28.5M | 4 spots to fill |
| Per spot | about $7M | If spread evenly |
Comparing each player's salary against their production in your league's scoring:
Using your remaining cap, your open spots, and your league's scoring:
| Target | Max bid | Why |
|---|---|---|
| Top guard | $14.0M | Fills your biggest hole |
| Wing | $6.0M | Two needed, so keep it cheap |
| Depth | $1.5M | Minimum salary tier |
2 minutes
In Claude, ChatGPT, or any MCP tool, add a custom connector and paste https://leagueloom.com/mcp, leaving the Client ID and Secret blank.
Choose Fantrax and paste your league URL. The Secret ID is optional and only helps the assistant find your other leagues later.
Copy the Fantrax Draft Kit prompt from the prompt library, paste it into your AI, and tell it your cap space and contract rules when it asks.
https://leagueloom.com/mcpAdd it as a custom connector, leave Client ID & Secret blank, then follow the quick wizard.
Why League Loom
Fantrax is where the complicated leagues live, and it is the platform most AI fantasy tools ignore entirely. A salary cap auction is not a draft board exercise: the question is never simply who is best available, it is what a player is worth to you given the cap room you have left and the contracts already on your roster.
League Loom is unusual in reading Fantrax at all, and it returns your roster with per-player salaries, which is the number this whole format turns on. The connector cannot see your cap total or your contract length rules, because Fantrax does not expose them, so the assistant asks you for those up front rather than guessing.
From there it can do the arithmetic that actually decides your draft: how much you can spend per open spot, which of your existing contracts are already bargains, and where the cheap production is in your specific scoring. Projections come from the assistant's own research across the major fantasy sites, clearly labeled as such, because League Loom does not return them.
FAQ
Not automatically, so it asks. Fantrax does not expose your cap total or contract rules to the API, so the assistant asks you once at the start and factors your answers into every price it quotes.
Yes. League Loom returns your Fantrax roster with each player's salary, which is what makes cap arithmetic possible at all.
From the assistant's own research, not from League Loom. The connector returns your league's scoring, roster, salaries, and draft history. Projections and ADP are researched by the AI from public fantasy sources and labeled as research.
Fantrax on League Loom covers NFL, NBA, MLB, NHL, and more, so the same draft prep works for a football auction or a basketball dynasty league.
No, it is optional. Paste your league URL and everything works. The Secret ID only lets the assistant discover your other Fantrax leagues on its own instead of you pasting each link.
Ready in two minutes
Free connector, private setup, and 18 current tools that retrieve or analyze your league data. No write-action tools are registered today.