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 CBB market, tip-off to the bracket.
ScoreTape records the full order book of every Polymarket and Kalshi college-basketball market — moneylines, spreads, and totals — then joins each one to the final score and the sportsbook lines. Built for the March volume nobody else keeps. 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
99.96%
verified settlements
settled market winners checked against the real final score
15
sportsbooks joined
up to 15 books per game, beside the prediction-market book
March
volume on tape
the tournament board recorded tick by tick
The product
One College Basketball game, one document
Every feed knows the same College Basketball 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/cbb-duke-unc-2026-03-07200 · matched
{
"result": { "winner": "Duke", "score": "78–74" },
"odds": [ { "provider": "FanDuel",
"spread": -2.5, "total": 149.5 }, … ],
"markets": [ { "kind": "moneyline",
"winner": "Duke" }, … 24 ],
"settlement": { "verified": true, "agrees_with_espn": true }
}
Entity-resolved and settlement-verified — markets, books, and result on one CBB game.
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
College-basketball coverage
College basketball carries order-book depth, settlement, scores, and sportsbook odds across the regular season and the tournament — built for March volume.
Sportsbook odds
Up to 15 books · spread · total · moneyline
Tournament
The March board recorded tick by tick
Results
Final scores, settlement-verified
Play-by-play
Where ESPN carries it
Settlement
99.96% agreement with the final score
Why ScoreTape
The best source of College Basketball prediction-market data
Sports odds APIs sell you college-basketball spreads. Exchange APIs hand you a raw Polymarket book with no game attached. Only ScoreTape welds the prediction-market depth, the sportsbook odds, and the verified result into one CBB record — at the volume the tournament demands.
| 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 college-basketball prediction-market data, ScoreTape is the only API that joins Polymarket and Kalshi order-book depth to final scores and sportsbook odds at March-Madness volume — with the market-to-game join verified at 99.96%.
✓ 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 College Basketball data in minutes
Every CBB endpoint is open on the free tier — pull a tournament game 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 College Basketball 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.
cbb.sh
# One College Basketball game, one document
$ GAME="cbb-duke-unc-2026-03-07"
$ 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/cbb/games?matched=true"Clean JSON·Cursor pagination·Per-plan rate limits
Why joined data
What it takes to model the college-basketball prediction markets
College basketball is a volume game — hundreds of teams, a board that explodes in March, and spreads that move on a tempo mismatch. CBB prediction-market data is only useful joined to the game that settled it.
01
The join is the edge
Polymarket names a market with a slug; ESPN files the same game under an event id. ScoreTape welds the two and verifies it against settlement (99.96% agreement across sports). One request returns the market, the books, and the result as one document — even across the chaos of the tournament.
02
Depth through the bracket
March turns the board over by the hour. ScoreTape records the live CBB order book on Polymarket and Kalshi, both sides, every level, so a backtest fills against real liquidity, game after game. Depth is forward-captured and cannot be backfilled — the tournament tape only exists because someone recorded it live.
03
Settlement you can trust
With this many games, automated settlement has to be right. ScoreTape cross-checks every resolved market winner against the ESPN result — 99.96% agreement — so your backtest reconciles against the game that actually happened, not a label.
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 college-basketball market — moneylines, spreads, and totals — recorded with full order-book depth and settlement, joined to the ESPN game: final score, sportsbook odds, and play-by-play where available.
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.