Built for P Polymarket · 7 markets flagged

See where Polymarket is wrong.

AlphaLine surfaces mispriced markets on Polymarket in real time, using injuries, lineup transfers, sharp money, and sentiment across NBA, NHL, MLB, and NFL.

View Live Markets How it works

YBacked by Y Combinator

alphaline.gg/dashboard

Live marketsstreaming

Market

AlphaLine

Edge

Signal

MLB

Dodgers @ Diamondbacks

53%

63%

+10.0%

Yamamoto 0.71 WHIP last 4; ARI 0-7 vs elite RHP this road trip

$Rangers$

MLB

Rangers @ Cardinals

51%

61%

+10.0%

deGrom 1.84 ERA last 7; STL bullpen 4.1 IP yesterday

MLB

Yankees @ Mets

54%

63%

+9.0%

Sharp steam on NYY -135 → -152; Mets bullpen taxed

UCL

Arsenal vs Paris S-G — UCL Final

31%

39%

+8.0%

Timber, Hakimi & Dembélé all confirmed fit — insider transfer

MLB

Dodgers @ Phillies

44%

53%

+9.0%

Yamamoto vs Wheeler — 4th-look regression flagged

MLB

Marlins @ Mets

62%

71%

+9.0%

Senga 1.94 ERA last 6; MIA bullpen overextended

Updated 2s ago12 markets · 8 with edge ≥ 5%

NBALuka Doncic — ruled OUT, hamstring (LAL R2 G1)· now|

NBAOKC 9 days rest, LAL on G7 OT fumes· 2m|

NHLGeorgiev starting — COL R2 G2 vs MIN· 3m|

MLBdeGrom 1.84 ERA / 13.2 K9 — TEX vs NYY· 4m|

NBAPistons 3-1 comeback — Cunningham 33/8/9 L3· 5m|

MLBAlcántara 2.85 ERA last 4 — MIA at TOR· 6m|

NHLMIN dressing 7 D-men — over-correction flag· 7m|

NBAMitchell ankle still managing — CLE R2 G1· 8m|

MLBSharp money on TEX +130 vs Yankees· 9m|

NHLMacKinnon TOI 23:48 G1 — sustainable· 10m|

NBADET +9% momentum after Magic comeback· 11m|

NFLRams SB LXI tightened +750 → +700· 12m|

NBALuka Doncic — ruled OUT, hamstring (LAL R2 G1)· now|

NBAOKC 9 days rest, LAL on G7 OT fumes· 2m|

NHLGeorgiev starting — COL R2 G2 vs MIN· 3m|

MLBdeGrom 1.84 ERA / 13.2 K9 — TEX vs NYY· 4m|

NBAPistons 3-1 comeback — Cunningham 33/8/9 L3· 5m|

MLBAlcántara 2.85 ERA last 4 — MIA at TOR· 6m|

NHLMIN dressing 7 D-men — over-correction flag· 7m|

NBAMitchell ankle still managing — CLE R2 G1· 8m|

MLBSharp money on TEX +130 vs Yankees· 9m|

NHLMacKinnon TOI 23:48 G1 — sustainable· 10m|

NBADET +9% momentum after Magic comeback· 11m|

NFLRams SB LXI tightened +750 → +700· 12m|

47.2M

Markets analyzed

since launch

1.2B

Signals ingested

wire + lineup + market

$284M

Edge captured

by users last 30d

184ms

Median signal latency

wire → fair price

Product

Built for the people who price markets, not chase them.

AlphaLine ingests every meaningful signal in sport — and tells you, in real time, when a market is wrong.

Real-time signals

Injuries, lineup transfers, weather, sharp money — surfaced the second they hit the wire.

True probability engine

A model trained on 8 seasons of player-impact, lineup, and market data outputs the fair price.

Edge detection

We compare market price to fair price and rank every market by expected value.

Multi-sport coverage

NBA, NHL, MLB, and NFL. One terminal, every game, every market.

Example signal · tonight

When Mitchell gets downgraded,
Polymarket is already wrong.

The injury wire updates. AlphaLine re-prices the game in milliseconds, surfaces the edge on Polymarket, and explains exactly why — before the line moves.

T+0s

Injury wire: Donovan Mitchell downgraded to QUESTIONABLE (ankle) — CLE ECF G1

T+0.4s

Lineup model recomputes — NYK win prob jumps 11%

T+1.1s

Edge alert pushed: Polymarket 58% vs fair 69%

T+42s

Polymarket begins to move; alert window closing

NBATonight · 8:00 PM ET · ECF Game 1

Cavaliers @ Knicks

Market on Polymarket: NYK wins ECF Game 1

Polymarket

58%

implied prob

AlphaLine

69%

true prob

Edge

+11.0%

market underpriced

Why

Mitchell downgraded to questionable (ankle). NYK 28-6 at MSG, full week rest after closing PHI in 7. Win prob updates from 58% → 69%.

injuryrest gaphome edge

Alerts

Get notified the moment edge appears.

One signal, four surfaces. Browser, mobile, Discord, in-app — pick your channel and AlphaLine routes the alert there in under 200ms.

Desktop · Browser push

AlphaLine — alphaline.gg

Edge alert · Arsenal vs Paris S-G — UCL Final

Market 31% → AlphaLine 39%. +8% edge. Timber, Hakimi & Dembélé all confirmed fit.

·

Chromium-style web push. No tab needed — fires even when AlphaLine is closed.

Mobile · iOS lock screen

ALPHALINE

now

Edge alert · Arsenal vs Paris S-G — UCL Final

31% market vs 39% fair · +8% edge. Timber starts; Hakimi & Dembélé fit.

Native push to iOS & Android via the AlphaLine companion app.

Community · Discord webhook

edge-alerts

AlphaLineAPPToday at 10:41 PM

Arsenal vs Paris S-G — UCL Final

Market 31% → AlphaLine 39% · +8.0% edge

Why: Insider transfer: Timber fit (starts at RB), Hakimi & Dembélé confirmed. Market hasn't moved.

Drop a webhook URL into your filter and we'll post embeds straight to your channel.

In-app · Live terminal toast

Edge crossed · 5%

Arsenal vs Paris S-G — UCL Final

39% fair vs 31% market — +8.0% edge

Every edge crossing flashes in the live terminal with a one-click jump to Polymarket.

PNative to Polymarket

Designed to ship inside Polymarket.

Drop the AlphaLine fair-price widget straight onto every market page. No model, no infra, no backfill — just one script tag.

polymarket.com/event/will-the-dodgers-beat-the-diamondbacks-june-1

PPolymarket

412.40 USDC

NBAReg. season · Mon 9:40 PM ET · Yamamoto vs Gallen·Live in 1h 12m

Dodgers@

Diamondbacks

Will Dodgers win in Arizona?

YES probability — 24hlast trade 53¢

Vol 24h: $148.7KLiquidity: $24.6KResolves: tonight

Powered by AlphaLine

Polymarket

53%

implied price

AlphaLine

63%

true prob

Edge

+10.0%

market underpriced

Why this is mispriced

Yamamoto 0.71 WHIP last 4; ARI 0-7 vs elite RHP this road trip. AlphaLine fair price 63%.

Open in AlphaLine·updated 11s ago

Recent tradeslive

YES · 53¢$3203s

YES · 54¢$18012s

NO · 46¢$9528s

YES · 53¢$54041s

Resolution

Market resolves YES if the Diamondbacks win as listed in regulation or overtime. Otherwise resolves NO. Source: official league scorebook.

verified by Polymarket UMA oracle

PInline badge

One-line pill next to the Yes/No price. Lowest-friction install.

PSidebar panelshown above

The full fair-price card shown above — context + edge + reason.

PFooter banner

Below-fold strip with hit-rate stats and the active edge.

Partnership

Ship the integration in 24 hours.

We'll deliver the @alphaline/widgetSDK, host the fair-price endpoint, and white-label the styling to Polymarket's tokens.

Talk to founders

Developers

Pipe AlphaLine into your stack.

REST + WebSocket + webhooks. Hit the Run button below — no API key needed.

API playground·PPolymarket

Auth

al_live_••••••dca7

key authorized

List mispriced markets on Polymarket

Returns every Polymarket market where AlphaLine's fair price diverges from the book by ≥ 5%.

GET/v1/polymarket/markets?min_edge=5

code

import { AlphaLine } from "@alphaline/node";

const al = new AlphaLine(process.env.ALPHALINE_API_KEY);

const { data } = await al.polymarket.markets.list({
  min_edge: 5,
  sport: "NBA",
});

for (const m of data) {
  console.log(m.game, m.pick, m.edge);
}

Test suitePolymarket integration · 8 tests

8 passing· 0 failing1.93s

auth_succeeds_with_valid_key41ms

rejects_expired_jwt18ms

lists_polymarket_markets_with_min_edge142ms

stream_emits_edge_crossed_events219ms

webhook_signature_verifies_hmac_sha25633ms

rate_limit_429_after_600_rps1284ms

respects_filter_min_edge_threshold87ms

polymarket_url_is_well_formed12ms

Read the full API reference Open in standalone view →

Coverage

Every league, every market.

We cover the full season — regular season, playoffs, and exhibition — across all four major US leagues. Every market type, every game, every minute.

NBA

1,230

games / season

18,420

markets covered

NHL

1,312

games / season

16,840

markets covered

MLB

2,430

games / season

32,110

markets covered

NFL

272

games / season

11,240

markets covered

Market types

MoneylineSpreadTotals (O/U)Player propsFirst TD1H spreadPeriod totalsPlayer reboundsPlayer assistsPitcher KsGoalie savesAnytime goalRace to 10Player 3PTQB pass yards+ 240 more

From the wire