Markets & depth
Polymarket + Kalshi order books, both sides
Live
NBA Finals
NYK0.612
SAS0.391NHL Cup Final
EDM0.547
FLA0.458MLB
NYY0.582
LAD0.421WNBA
NYL0.634
LVA0.370MLB
CHC0.498
ATL0.505
NYK0.612SAS0.391NHL Cup FinalEDM0.547FLA0.458MLBNYY0.582LAD0.421WNBANYL0.634LVA0.370MLBCHC0.498ATL0.505MLS prediction-market data, joined to the result.
ScoreTape records the full order book of every Polymarket and Kalshi MLS market, then joins each one to the final score and a multi-book closing-odds archive (Pinnacle, Bet365 and more, via football-data). Major League Soccer — North America's top flight, surging on the US-based exchanges. Served over one REST API.
Free tier, no card — every league and endpoint included.
ScoreTape
Jun 12 · liveNBAMLBNHLWNBAEPL
MoneylineSpreadTotalProps
Settlement-verifiedTimeTeamPolymarketKalshiDKFDBest
20:30Knicks0.612▲0.609-135-1380.612
Knicks0.612▲0.609-135-1380.612Spurs0.391▼0.394+115+1180.39420:00Oilers0.5470.551-120-1180.551
Oilers0.5470.551-120-1180.551Panthers0.458▲0.452+102+1000.45819:05Yankees0.582▲0.578-142-1400.582
Yankees0.582▲0.578-142-1400.582Dodgers0.4210.426+120+1220.42619:00Liberty0.6340.630-170-1720.634
Liberty0.6340.630-170-1720.634Aces0.370▼0.374+145+1480.374369,412 markets on tapeorder books streaming
369,000 markets across 13 leagues — every one resolved to its real-world game
NFL
NBA
MLB
NHL
WNBA
UFC
Premier League
Champions League
La LigaCFBCFBCBBCBBATPTennisArchive
closing odds
multi-book closing lines from football-data
99.96%
verified settlements
settled market winners checked against the real final score
2
venues on tape
every Polymarket & Kalshi market, both sides of the book
Results
every fixture
final scores joined to the prediction-market book
The product
One MLS game, one document
Every feed knows the same MLS game by a different name — a slug on Polymarket, an event id at ESPN, a ticker on the exchange. ScoreTape resolves them to one record and answers a single request with everything that game was.
PolymarketOrder-book depth — every level, both sides, tick by tick.
KalshiYes/no books and settlement for every sports market.
ESPN
Final scores — plus a multi-book closing-odds archive (Pinnacle, Bet365 and more) via football-data.
GET /v1/games/soccer-mia-lag-2026-06-13200 · matched
{
"result": { "winner": "Inter Miami", "score": "3–2" },
"odds": [ { "provider": "Pinnacle",
"home": 2.10, "draw": 3.40, "away": 3.20 }, … ],
"markets": [ { "kind": "match_result",
"winner": "Inter Miami" }, … 21 ],
"history": { "odds_archive": "closing odds → present" }
}
Entity-resolved and settlement-verified — markets, multi-book odds, and the MLS result on one fixture.
Market depth
Backtest against the book, not the headline price
A fill has a cost the last trade never shows. ScoreTape records the live order book for sports markets on Polymarket and Kalshi, so your strategy sizes against the liquidity that actually existed at that moment.
- Every level, both sides — not a last price or a mid nobody could trade
- Forward-captured continuously; order-book history cannot be backfilled
- Replayable: snapshot time-series per outcome token via one endpoint
Knicks
SpursBest bid
0.612
Mid
0.6135
Best ask
0.615
Spread
0.003
Cumulative depthBidsAsks
Imbalance
54 / 46
Coverage
MLS coverage
The MLS carries order-book depth, settlement, results, and a multi-book closing-odds archive (Pinnacle, Bet365 and more) joined to the live Polymarket and Kalshi book.
Sportsbook odds
Multi-book closing odds (Pinnacle, B365)
Clubs
Inter Miami · LA Galaxy · LAFC · Seattle Sounders
Results
Final scores, settlement-verified
Fixtures
Every market resolved to its real fixture
Settlement
99.96% agreement with the result
Why ScoreTape
The best source of MLS prediction-market data
Sports odds APIs sell you MLS 1X2 lines. Exchange APIs hand you a raw Polymarket book with no fixture attached. Only ScoreTape welds the prediction-market depth, the sportsbook odds, and the verified MLS result into one record.
| Capability | ScoreTapethis API | Sports odds APIsthe-odds-api, SportsDataIO | Exchange APIsPolymarket / Kalshi direct |
|---|---|---|---|
| Prediction-market order-book depth (both sides, every level)Exchange APIs expose a raw live book — ScoreTape records every level, both sides, tick by tick. | |||
| Forward-captured as a queryable history, not just liveDepth cannot be backfilled once the game is over — the archive only exists because it was recorded live. | |||
| Sportsbook odds in the same recordOdds APIs serve lines only — no prediction-market book beside them. | |||
| Final scores & results joined to the market | |||
| Settlement-verified market-to-game join (99.96%)No other source cross-checks settled market winners against the real result. | |||
| Historical odds archive (back to 1999 / 2000-01) | |||
| One request returns the whole game as one documentMarkets, depth, settlement — and odds, result and injuries where the sport carries them — in a single record. |
The bottom line. For MLS prediction-market data, ScoreTape is the only API that joins Polymarket and Kalshi order-book depth to a multi-book closing-odds archive and settlement-verified MLS results — served over one REST API.
✓ full · – partial · ✕ not offered. Comparison reflects the standard data products of each category; individual vendors vary. ScoreTape is independent and not affiliated with any exchange, sportsbook, or league.
Quickstart
From key to joined MLS data in minutes
Every soccer endpoint is open on the free tier — pull a MLS fixture and read the joined document.
- 01
Grab a key
Free tier, no card — every league and endpoint is open from day one.
- 02
Pull a MLS game
One request returns the joined document: markets, odds, result.
- 03
Walk the season
Page every matched game with cursor pagination and reconcile against settlement.
mls.sh
# One MLS game, one document
$ GAME="soccer-mia-lag-2026-06-13"
$ curl -s -H "X-API-Key: $KEY" \
"https://api.scoretape.com/v1/games/$GAME"
# Browse this sport's markets
$ curl -s -H "X-API-Key: $KEY" \
"https://api.scoretape.com/v1/mls/games?matched=true"Clean JSON·Cursor pagination·Per-plan rate limits
Why joined data
What it takes to model the MLS prediction markets
Major League Soccer — North America's top flight, surging on the US-based exchanges. MLS prediction-market data is only useful joined to the fixture it settled on and the odds behind the price.
01
Inside the MLS
MLS has surged on Kalshi and Polymarket, both US-based, and ScoreTape carries its multi-book closing odds (Pinnacle, Bet365 and more) alongside the live order book. With the 2026 World Cup hosted across North America, MLS clubs, players, and stadiums are trading at record interest.
02
The join is the edge
Polymarket names a MLS market with a slug; ESPN files the same fixture under an event id. ScoreTape's entity-resolution layer welds the two and verifies it against settlement — settled winners agree with the real result in 99.96% of checked games across sports. One request returns the market, the odds archive, and the result as one document.
03
Depth is the truth
ScoreTape records the live MLS order book on Polymarket and Kalshi — both sides, every level, tick by tick — so a backtest fills against the liquidity that actually existed, not a last price. Depth is forward-captured and cannot be backfilled once the fixture is over.
Pricing
Pick your window
Every plan gets every league and every endpoint. You're choosing how far back the tape rolls — and how hard you can pull on it.
Free
$0free, no card
Seven days of tape to prove it's real.
- 7-day Kalshi & Polymarket tape
- 7-day scores & sportsbook odds
- All leagues, all endpoints
- Read-only API, 1 req/sec
Pro
Most popular$29per month
The modeler's window — a month of tape.
- 30-day Kalshi & Polymarket tape
- 90 days of scores & sportsbook odds
- Real-time injury webhooks (~60s)
- 25 req/sec, 1,000 req/min
- Settlement-verified winners
Scale
$79per month
Two months of tape, a full year of results.
- Everything in Pro
- 60-day Kalshi & Polymarket tape
- Full year of scores & sportsbook odds
- Live order-book snapshots
- 50 req/sec, 3,000 req/min
Enterprise
$200per month
Dedicated lanes for systematic desks.
- Everything in Scale
- Unlimited tape history
- Full sports archive — odds to 1999
- Dedicated capacity, 100 req/sec
- Priority support
FAQ
Common questions
The short version of what people ask before they pull their first game document.
Every Polymarket and Kalshi MLS market — match result, totals, and more — recorded with full order-book depth and settlement, joined to the real fixture: final score, and a multi-book closing-odds archive. The market-to-game join is settlement-verified, with settled winners agreeing with the real result in 99.96% of checked games.
Something else? Read the docs or ask us directly.
Stop joining sports data by hand
Markets, odds, results, and injuries — already resolved to the same game. The free tier opens every league and endpoint, no card.