Build a Baseball Betting Odds Application
Create an odds comparison tool with moneyline, run line, and totals from multiple bookmakers.
What You'll Build
A baseball odds application that displays pre-match betting lines from multiple bookmakers. Compare moneyline, run line (spread), and over/under totals to find the best value.
The Odds Endpoint
The /baseball/odds endpoint returns pre-match odds for games within a specified date range (max 5 days).
Understanding Baseball Odds
The API returns three main market types for baseball:
Moneyline
Pick the winner. Negative odds (-145) indicate favorite, positive (+125) indicate underdog.
- -145: Bet $145 to win $100
- +125: Bet $100 to win $125
Run Line (Spread)
Baseball's version of point spread, typically -1.5 or +1.5 runs.
- Favorite -1.5: Must win by 2+ runs
- Underdog +1.5: Can lose by 1 run and still cover
Totals (Over/Under)
Bet on combined runs scored by both teams.
- Over 8.5: Combined score must be 9+ runs
- Under 8.5: Combined score must be 8 or fewer runs
Response Structure
Each game includes odds from multiple bookmakers:
Building the Odds Comparison UI
Finding Best Odds
Highlight the best available odds across bookmakers:
Odds Movement Tracking
Track how odds change over time by storing historical snapshots:
Filtering and Sorting
- Filter by date range (today, tomorrow, week)
- Filter by league (MLB only, or include international)
- Sort by game time, odds value, or line movement
- Show only games with odds movement
Legal Considerations
Displaying odds is legal in most jurisdictions, but ensure you:
- Include disclaimer about gambling age requirements
- Don't facilitate actual betting transactions
- Comply with local gambling advertising laws
- Clearly state that odds are for informational purposes
Enhancement Ideas
- Add implied probability calculator
- Show expected value (EV) calculations
- Integrate with team stats for analysis
- Push notifications for significant line movements
- Historical odds accuracy tracking