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 FinalEDM0.547FLA0.458MLBNYY0.582LAD0.421WNBANYL0.634LVA0.370MLBCHC0.498ATL0.505Every UFC market, fight to the result.
ScoreTape records the full order book of every Polymarket and Kalshi UFC market, then joins each fight to the official result and the per-fight moneylines. 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 LigaCFBCFBCBBCBBATPTennis2
venues on tape
every Polymarket & Kalshi market, both sides of the book
per-fight
moneylines
the one individual sport ESPN retains odds for
99.96%
verified settlements
settled market winners checked against the real final score
fighter
resolution
every market resolved to the official result by fighter
The product
One UFC game, one document
Every feed knows the same UFC 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, box scores, play-by-play — plus odds from up to 15 sportsbooks.
GET /v1/games/ufc-313-jones-aspinall-2026-05-31200 · matched
{
"competitors": [ { "name": "Aspinall", "winner": true },
{ "name": "Jones", "winner": false } ],
"odds": [ { "fight": "main", "aspinall": -150,
"jones": +130 } ],
"markets": [ { "kind": "fight_winner",
"winner": "Aspinall" }, … ]
}
Resolved by fighter and settlement-verified — fight markets, per-fight moneylines, and the result on one bout.
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
UFC & MMA coverage
UFC carries order-book depth, settlement, official results by fighter, and per-fight moneylines — the one individual sport ESPN retains odds for.
Fight moneylines
Per-fight odds from ESPN
Results
Official result by fighter, winner flags
Title fights
Main events recorded tick by tick
Settlement
Verified against the official result
Resolution
Matched to the bout by fighter names
Why ScoreTape
The best source of UFC prediction-market data
Sports odds APIs give you a fight moneyline at best. Exchange APIs hand you a raw Polymarket book with no bout attached. Only ScoreTape welds the prediction-market depth, the per-fight moneyline, and the official result into one verified UFC 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 book, but unjoined and not archived as forward-captured history. | |||
| 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. | |||
| Real-time injury webhooks (~60s, signed) | |||
| Player props resolved to real athletes | |||
| Historical odds archive (back to 1999 / 2000-01) | |||
| One request returns the whole gameMarkets, odds, result, and injuries arrive as a single joined document. |
The bottom line. For UFC prediction-market data, ScoreTape is the only API that joins Polymarket and Kalshi order-book depth to official results and per-fight moneylines, resolved by fighter and settlement-verified.
✓ 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 UFC data in minutes
Every UFC endpoint is open on the free tier — pull a fight card 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 UFC 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.
ufc.sh
# One UFC game, one document
$ GAME="ufc-313-jones-aspinall-2026-05-31"
$ 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/ufc/games?matched=true"Clean JSON·Cursor pagination·Per-plan rate limits
Why joined data
What it takes to model the UFC prediction markets
A fight market is a clean binary that can swing on a weigh-in or a late replacement. UFC prediction-market data is only useful joined to the bout it settled on and the moneyline behind the price.
01
Resolved by fighter
ScoreTape resolves every Polymarket and Kalshi UFC market to its real bout by fighter names, with per-fighter winner flags, and verifies the result against settlement. One request returns the market, the per-fight moneyline, and the official result as one document.
02
Depth on the binary
In a two-outcome fight market, the book is the whole story. ScoreTape records the live UFC order book on Polymarket and Kalshi — both sides, every level — so a backtest fills against the liquidity that actually existed into the walk-out, not a last price. Depth is forward-captured and cannot be backfilled.
03
The only individual sport with odds
UFC is the one individual sport ESPN retains odds for — ScoreTape carries per-fight moneylines beside the prediction-market book, so you can measure the market against the closing line fight by fight.
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
Prediction-market data for every sport
Read the API docsFAQ
Common questions
The short version of what people ask before they pull their first game document.
Every Polymarket and Kalshi UFC market — recorded with full order-book depth and settlement, resolved to the real bout by fighter names with per-fighter winner flags, and joined to ESPN's per-fight moneylines. UFC is the one individual sport ESPN retains pre-fight odds for.
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.