OddsDesk

Desktop app that pulls real-time sports odds from 20+ US bookmakers and surfaces +EV bets, arbitrage opportunities, and middles.

Built with Tauri 2, Svelte 5, and Rust. Ported from the original Python Textual TUI (preserved under python-legacy/ as a reference implementation).

Download

Grab the latest build from the Releases page.

macOS (Apple Silicon)

1. Download OddsDesk_X.Y.Z_aarch64.dmg.
2. Open the DMG and drag OddsDesk.app to /Applications.
3. On first launch, macOS will complain that the app isn't signed. Two fixes:
   • Right-click OddsDesk.app → Open → click Open in the dialog.
   • Or from Terminal:

     xattr -dr com.apple.quarantine /Applications/OddsDesk.app
     

Intel Macs aren't shipped as a prebuilt binary — build from source (instructions below).

Windows (x64)

1. Download OddsDesk_X.Y.Z_x64_en-US.msi.
2. Run the installer. Windows SmartScreen may warn — click More info → Run anyway.

Linux

Not shipped yet. Build from source instructions below.

First-time setup

OddsDesk needs an API key from The Odds API.

⚠️ The free plan (500 credits/month) will not work. The Odds API bills markets × regions per /odds call and per event on /events/{id}/odds (used for props). A polling tool like this — watching multiple sports, books across several regions, and refreshing every minute or two — burns through hundreds of credits per hour even on a conservative config. The $30/month (20k credits) tier is the practical floor for main-lines only; if you want player props enabled or a wide region list, you'll need one of the higher paid tiers. Tune regions_games, regions_props, odds_refresh_interval, and props_markets in settings.yaml to control burn rate.

1. Sign up at the-odds-api.com and copy your API key.

2. Launch OddsDesk once to let it create its config directory, then edit the files inside:

   OS	Config directory
   macOS	~/Library/Application Support/com.oddsdesk.app/
   Windows	%APPDATA%\com.oddsdesk.app\

3. Create a .env file in that directory with:

   ODDS_API_KEY=your_key_here
   

4. Edit settings.yaml in the same directory to choose your sports, bookmakers, refresh intervals, EV threshold, etc. (You can also edit most of these live from the in-app Settings drawer — press s.)

5. Restart the app. You should see live odds populate.

Features

• Live odds from 20+ US bookmakers — FanDuel, DraftKings, BetMGM, BetRivers, Caesars, Fanatics, ESPN BET, and more.
• Three markets per game — moneyline, spreads, totals — with a toggle.
• Alternate lines — expand alternate spreads/totals for coverage across the full line ladder (l key).
• Player props across NBA / NFL / MLB / NHL with sport-specific markets (PTS / REB / AST / PaYd / HR / SOG etc.).
• DFS books — PrizePicks, Underdog, Pick6, Betr supported with configurable effective odds (for multi-leg pricing).
• Inline no-vig + EV% right in the table — fair price and the expected value of the best available line on every row.
• Best-price highlighting — the highest quote across all books is marked per outcome.
• +EV detection — market-average no-vig consensus with a configurable threshold. Persisted to SQLite with a "N minutes ago" age column.
• Arbitrage detection — two-leg guaranteed-profit opportunities with recommended stake sizing (Leg A fixed at $100, Leg B equalized) and payout.
• Middles detection — cross-line opportunities with hit probability, window size, and hit/miss profit calculation.
• Live scores — game status, live scores, and start times from The Odds API scores endpoint.
• API credit management — tracks remaining credits from response headers, warns at configurable thresholds, pauses fetching when critical.
• Configurable — in-app settings drawer persists to settings.yaml.

Player props

Settings

Press s to open the Settings drawer. Every key from settings.yaml is editable live (except the API key, which is managed via .env).

Keyboard shortcuts

Build from source

Prereqs: Node 22+, pnpm 10+, Rust stable.

git clone https://github.com/<your-org>/oddsdesk.git
cd oddsdesk
pnpm install
pnpm tauri dev          # hot-reloading dev build
pnpm tauri build        # release build → src-tauri/target/release/bundle/

In dev mode the app reads settings.yaml and .env from the repo root instead of the per-user config directory.

Configuration

All settings live in settings.yaml. Most fields are editable from the in-app Settings drawer; the full list with defaults:

How detection works

+EV: for each outcome, the engine averages the implied probabilities across every book offering it, normalizes to remove the vig (so the pair sums to 1), and compares each book's actual price to that fair probability. If the best price at a book yields EV ≥ ev_threshold, it's flagged.

Arbitrage: at the same line, if the best prices on opposite outcomes across different books have implied probabilities summing to less than 1, there's a guaranteed-profit arb. Stake sizing equalizes payout across both legs.

Middles: cross-line opportunities where Book A offers Over 220.5 and Book B offers Under 222.5, creating a window (221 or 222 totals land both legs). Hit probability is estimated from sport-specific point density.

Project status

First desktop release is v0.1.0 — functional, unsigned, personal-use. A follow-up pass (Phase 3b in tasks/todo.md) will fix five known engine bugs identified during the Rust port:

• Alt-line over-normalization in no-vig consensus
• Middles sizing inconsistency between engine EV and panel display
• min_books filter applying across all outcomes instead of per-outcome
• Spread-middle same-team edge case
• american_to_decimal(0) silent fallback

These are preserved for parity with the Python reference in v0.1.0.

License

MIT. See LICENSE.