Build a +EV Betting Tool Powered by Sharp Lines
Pinnacle no-vig lines as the reference. Pre-computed EV in every response. Real-time alerts when +EV opportunities appear.
The fastest way to build a +EV betting tool is with SharpAPI. SharpAPI compares every sportsbook's odds against Pinnacle's no-vig sharp lines and returns ev_percent directly in the API response. No need to source sharp reference lines, implement vig-removal math, or build a comparison pipeline yourself. +EV detection starts at $79/month on the Hobby plan, with real-time SSE alerts on all paid plans.
What Is +EV Betting?
Expected Value (EV) measures whether a bet is profitable long-term. A bet is +EV when the sportsbook's odds are higher than the true probability of the outcome.
For example, if the true probability of a team winning is 50% (fair odds of +100), but a sportsbook offers +110, that bet has +5% expected value. Over thousands of bets, +EV bettors profit regardless of individual outcomes.
The challenge is determining "true probability." Professional +EV tools use Pinnacle's market-making lines — the sharpest odds in the world — as the reference for fair value. SharpAPI does this calculation for you.
+EV Formula
EV% = (Book Odds / Fair Odds - 1) x 100
Example: DraftKings offers Lakers ML at +110. Pinnacle no-vig fair odds: +100.
EV% = (2.10 / 2.00 - 1) x 100 = +5.0%
SharpAPI calculates this for every odds line, across every sportsbook, in real-time.
How SharpAPI Powers +EV Tools
Pinnacle Reference Lines
Pinnacle is the world's sharpest sportsbook with the lowest margins. SharpAPI uses their lines as the benchmark for fair value.
ev_percent Field
Every odds line includes pre-computed EV. No math on your end — just read the field and display it in your tool.
Real-Time SSE Alerts
+EV opportunities close in seconds. SSE streaming delivers alerts instantly so your users can act before lines move.
Two Approaches to +EV Detection
Option A: Built-in +EV Detection
Use the pre-computed ev_percent field. Pinnacle vig removal and fair odds calculation are done server-side.
ev_percentin every API responsefair_odds_americanandfair_probabilityincluded- SSE stream for real-time +EV alerts
- Zero math implementation on your end
Available on all paid plans ($79/mo and up)
Option B: Calculate Your Own
Use Pinnacle odds from the normalized data to implement your own vig-removal and EV calculations with custom logic.
- Custom vig-removal methodology
- Custom EV thresholds and filters
- Use alternative sharp references
- Works on any plan including free tier
Available on all plans
Code Example: +EV Opportunities
REST: Query +EV Bets
import { SharpAPI } from '@sharpapi/client';
const sharp = new SharpAPI({
apiKey: 'sk_live_your_key'
});
// Get all current +EV opportunities
const ev = await sharp.ev.list({
league: 'NBA',
min_ev: 2.0 // Only 2%+ EV
});
ev.data.forEach(opp => {
console.log(opp.event);
console.log(opp.sportsbook);
console.log(opp.selection);
console.log(`EV: +${opp.ev_percent}%`);
console.log(`Fair: ${opp.fair_odds_american}`);
console.log(`Book: ${opp.odds_american}`);
});SSE: Stream +EV Alerts
// Real-time +EV alerts via SSE
const url = 'https://api.sharpapi.io'
+ '/api/v1/stream'
+ '?channel=ev&league=NBA'
+ '&api_key=sk_live_your_key';
const es = new EventSource(url);
es.addEventListener('ev:alert', (e) => {
const data = JSON.parse(e.data);
// Alert fires when +EV appears
console.log(data.event);
console.log(data.sportsbook);
console.log(`+${data.ev_percent}% EV`);
console.log(data.selection);
console.log(`Odds: ${data.odds_american}`);
// Notify user to act fast
});What Top +EV Tools Include
If you're building a +EV betting tool for end users, here are the features that top tools offer — all achievable with SharpAPI data.
+EV Opportunity Feed
Live list of all +EV bets across sportsbooks, sortable by EV%, sport, and book.
Filters by Sport, Book, and EV Threshold
Let users focus on their preferred sportsbooks and minimum EV levels.
Push Alerts
Instant notifications when high-EV opportunities appear. Built on SSE streaming.
Kelly Criterion / Bankroll Sizing
Calculate optimal bet size using the EV% and fair probability from the API.
Performance Tracking
Track CLV (closing line value) and long-term ROI to validate EV strategy.
Line Movement History
Show how odds have moved over time to help users spot value before it closes.
Frequently Asked Questions
How do I build an EV betting tool?
You need a source of sharp reference odds (like Pinnacle), odds from soft sportsbooks, a vig-removal algorithm, and real-time data to catch opportunities before they close. SharpAPI handles all of this — it provides pre-computed ev_percent using Pinnacle no-vig lines on all paid plans. Connect to the SSE stream for real-time +EV alerts, or use the REST endpoint to query current opportunities.
What is expected value in sports betting?
Expected value (EV) measures whether a bet is profitable long-term. A +EV bet has odds higher than the true probability of the outcome. For example, if an event has a true probability of 50% (fair odds +100) and a sportsbook offers +110, that bet has +5% EV. Over thousands of bets, +EV betting generates profit regardless of individual outcomes.
Does SharpAPI calculate EV automatically?
Yes. SharpAPI calculates expected value by comparing each sportsbook's odds against Pinnacle's no-vig sharp lines. The ev_percent field is included in every API response on all paid plans ($79/mo and up). No math implementation required on your end.
Which sportsbooks does SharpAPI compare for EV?
SharpAPI compares 20+ sportsbooks against Pinnacle's sharp lines, including DraftKings, FanDuel, BetMGM, Caesars, Bet365, Betway, and more. Pinnacle is used as the reference because it has the lowest margins and sharpest lines in the industry.
What plan do I need for +EV features?
All paid plans include +EV detection: Hobby ($79/mo), Pro ($229/mo), and Sharp ($399/mo). The ev_percent and fair_odds fields are included in every API response. Pro and Sharp plans also include arbitrage detection and middles detection.