Questions, answered straight

The learn articles, the transparency Record tab, and this FAQ are open to everyone. The transparency experiments and ledger tabs need a free account, and so does the dashboard's schedule. A paid plan unlocks the model projections and the game pages. The pricing page lists what each plan includes.

Fairline covers MLB, NHL, the English Premier League, and the NFL. Each one gets a quantitative projection model, and every book price we capture sits beside it on the game page.

A full pipeline runs several times a day per sport, and a background worker refreshes live sportsbook odds continuously before each game. Projections stop updating once a game starts. Before that, confirmed lineups and starters are the last large input to change.

No. Every model is built from public statistics and computed before any book odds are fetched. Book prices are pulled separately, after the projection, only to compare against the model's fair odds. The projection always stands as an independent opinion.

No. Fairline publishes statistical estimates and labeled fair odds for comparison. Betting carries real risk, results swing widely over small samples, and you should only bet what you can afford to lose. If gambling is a problem, call 1-800-GAMBLER.

Fair odds are the price at which a bet breaks even over the long run, given the model's probability. A board card prints that price for each side and puts the best current book price under it. Comparing the two is the whole point, and neither number is a recommendation.

The transparency page publishes live graded calibration for MLB, NHL, EPL, and NFL, plus the 2025 point-in-time MLB backtest. A sport shows its sample count, so a model with no graded games yet reads as empty rather than as a claim. Each model page documents its framework and parameters.

Yes, if the model prices that market. Open the game from the board. Its page prints the model's fair price for every market the model prices, beside the current price at every book Fairline tracks, and it tints the cells the model flags. Read your own price against the fair one. It needs an account and a paid plan.

Yes. Kalshi appears as one of the priced books on a game board whenever it lists a matching market. Fairline converts its cent prices to American odds and lists them beside the sportsbooks. Fairline places nothing on your behalf. It needs an account and a paid plan.

Scan the board. Every card carries the best book price under each fair price, and an MLB or EPL card wears a chip when the model disputes one of that game's lines. NHL and NFL flags stay off until each model validates on a forward window. Open the game to see every book, with the flagged cells tinted. You can also opt into two emails per sport, one when a lineup is confirmed and one about 30 minutes before the game starts. It needs an account and a paid plan.

The chip names the biggest gap between a model price and a book price on that game. Read "U 8.5 · FD +126 · fair +107" as the under 8.5, priced +126 at FanDuel, against the model's break-even price of +107. A trailing +2 means the game holds two more flagged sides. Only moneyline, spread and total feed the chip, so team totals and player props never do. The chip is a difference, not a pick. It needs an account and a paid plan.

The learn articles, the transparency Record tab, and this FAQ need no account. The transparency experiments and ledger tabs and the dashboard's schedule need a free account. The model projections and the game pages need a paid plan. The pricing page has the details.

Fairline is an independent project built and run by a single developer. It is not affiliated with any sportsbook, league, or data provider.

Yes. Fairline ships a remote MCP connector. Add it as a custom connector on claude.ai (it syncs to the Claude mobile and desktop apps), sign in with your Fairline account, and your assistant can shop lines across every book Fairline tracks. It needs an account and a paid plan.