What Is a Sportsbook API?
A sportsbook API gives you programmatic access to betting odds and market data from licensed sportsbooks. This guide explains what sportsbook APIs provide, who uses them, the difference between operator-facing and developer-facing APIs, and how to connect to one in minutes.
A sportsbook API is a programmatic interface that provides real-time odds, lines, and market data from one or more sportsbooks via HTTP. Most major US sportsbooks (DraftKings, FanDuel, BetMGM, Caesars) don't offer public developer APIs — aggregator APIs like SharpAPI collect publicly displayed odds from 32+ books and normalize them into a single JSON schema. You get moneylines, spreads, totals, props, futures, and in-play odds in one request.
1. What a Sportsbook API Delivers
A sportsbook API returns structured betting data via HTTP. A single call can return odds from dozens of sportsbooks simultaneously, all normalized into a consistent format:
{
"event": "Boston Celtics @ Los Angeles Lakers",
"commence_time": "2026-04-17T00:30:00Z",
"sport": "basketball_nba",
"bookmakers": [
{
"key": "draftkings",
"title": "DraftKings",
"markets": [
{
"key": "h2h",
"outcomes": [
{ "name": "Boston Celtics", "price": -155, "no_vig_price": -148 },
{ "name": "Los Angeles Lakers", "price": 130, "no_vig_price": 138 }
]
}
]
},
{
"key": "fanduel",
"title": "FanDuel",
"markets": [/* same schema */]
}
]
}Moneyline (h2h)
Win outright odds for each team
Point spread
Handicap lines with vig
Totals
Over / under combined score
Player props
Individual player performance
Alternate lines
Non-standard spreads and totals
Futures
Season-long markets
In-play / live
Odds during the event
No-vig fair value
Margin-removed reference
2. Two Types of Sportsbook APIs
Developer / aggregator APIs
These aggregate multiple sportsbooks into one normalized endpoint. You don't need accounts at each sportsbook. Best for developers building betting tools.
- • SharpAPI — 32+ books, built-in +EV/arb, $0–$399/mo
- • The Odds API — 40+ books, REST only, $30–$249/mo
- • OddsBlaze — 70+ books, historical data, $29–$999/mo
Operator / B2B APIs
Enterprise platforms that power entire betting operations — odds feed, risk management, settlement. Require contracts, custom pricing, compliance reviews.
- • Sportradar
- • Kambi
- • Amelco
Most developers and startups need the aggregator type. This guide focuses there.
3. What You Can Build
| Use Case | What You Need | Example Stack |
|---|---|---|
| Odds comparison site | All books, all sports, real-time | Next.js + SharpAPI SSE |
| Arbitrage scanner | Cross-book odds + arb detection | Python + SharpAPI arb endpoint |
| +EV betting tool | Pinnacle no-vig + fair value | Node.js + SharpAPI ev endpoint |
| Line movement tracker | Historical snapshots + streaming | Python + SQLite + SSE |
| Discord/Telegram alerts | Filtered odds deltas + webhooks | Python + discord.py |
| DFS research tool | Player props + implied probabilities | Python / R + REST |
| Analytics dashboard | Historical + current odds | React + Recharts + SharpAPI |
4. Why DraftKings and FanDuel Don't Have Public APIs
The major US sportsbooks have no public developer APIs. Their internal APIs exist but are undocumented, rate-limited aggressively, and prohibited for third-party access under their terms of service.
Aggregator APIs like SharpAPI solve this by legally collecting publicly displayed odds (the same numbers you see on their websites) and normalizing them into a developer-friendly format. No sportsbook account is needed — SharpAPI handles the data collection.
This means one API key gives you:
- DraftKings moneylines, spreads, props
- FanDuel moneylines, spreads, props
- BetMGM, Caesars, Bet365, Pinnacle, and 27+ more
- All normalized into the same JSON schema
5. Connecting in 5 Minutes
TypeScript
import SharpAPI from '@sharp-api/client'
const client = new SharpAPI({ apiKey: process.env.SHARPAPI_KEY! })
const odds = await client.odds.list({
sport: 'basketball_nba',
markets: ['h2h', 'spreads'],
})
console.log(`Found ${odds.data.length} NBA events`)
odds.data.forEach(event => {
console.log(`${event.homeTeam} vs ${event.awayTeam}`)
console.log(` ${event.bookmakers.length} sportsbooks`)
})Python
from sharpapi import SharpAPI
client = SharpAPI(api_key="YOUR_KEY")
odds = client.odds.list(sport="basketball_nba", markets=["h2h", "spreads"])
for event in odds.data:
print(f"{event.home_team} vs {event.away_team}: "
f"{len(event.bookmakers)} books")cURL
curl "https://api.sharpapi.io/v1/odds?sport=basketball_nba&markets=h2h" \
-H "Authorization: Bearer YOUR_KEY"All three return the same normalized JSON. Get your free API key at sharpapi.io/sign-up.
6. Sportsbook API Comparison
| Provider | Books | Sports | Free Tier | Real-Time | Built-in Analytics |
|---|---|---|---|---|---|
| SharpAPI | 32+ | 8 | Yes (12 req/min) | SSE + WS | +EV, Arb, Middles |
| The Odds API | 40+ | 40+ | Yes (500 req/mo) | REST only | No |
| OddsBlaze | 70+ | 15+ | No | Yes | Historical CLV |
| OpticOdds | 200+ | 30+ | No (enterprise) | Yes | No |
| Sportradar | 100+ | 50+ | No (enterprise) | Yes | No |
SharpAPI is the only provider that ships +EV detection, arbitrage alerts, and middles detection as built-in API endpoints.
7. Supported Sports
Most sportsbook aggregator APIs cover:
- NFL, NBA, MLB, NHL (US majors)
- NCAAF, NCAAB (college)
- Soccer — EPL, La Liga, Serie A, Bundesliga, Champions League, MLS
- UFC / MMA
- Golf, Tennis (varies by provider)
- Esports (varies by provider)
SharpAPI covers the full US betting market. See the sportsbook pages for per-book and per-sport coverage details.