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.
DepthFeed records the full order book of every Polymarket and Kalshi MLS market, then joins each one to the final score and a normalized multi-book closing-odds archive via football-data. Major League Soccer — North America's top flight, surging on the US-based exchanges. Available through DepthFeed's REST API and live WebSocket.
Desk includes sports REST + WebSocket · 7-day evaluation available.
DepthFeed
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. DepthFeed resolves them to one record and answers a single request with everything that game was.
PolymarketOrder-book depth — every level on both sides, captured as complete ladders.
KalshiYes/no books and settlement for every sports market.
ESPN
Final scores — plus a normalized multi-book closing-odds archive via football-data.
GET /v1/games/soccer-mia-lag-2026-06-13200 · matched
{
"result": { "winner": "Inter Miami", "score": "3–2" },
"odds": [ { "provider": "Multi-book",
"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. DepthFeed 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 normalized multi-book closing-odds archive joined to the live Polymarket and Kalshi book.
Sportsbook odds
Normalized multi-book closing odds
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 DepthFeed
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 DepthFeed welds the prediction-market depth, the sportsbook odds, and the verified MLS result into one record.
| Capability | DepthFeedthis 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 — DepthFeed records every level on both sides as complete ladders. | |||
| 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, DepthFeed 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 through DepthFeed REST and WebSocket APIs.
✓ full · – partial · ✕ not offered. Comparison reflects the standard data products of each category; individual vendors vary. DepthFeed is independent and not affiliated with any exchange, sportsbook, or league.
Quickstart
From key to live MLS depth in minutes
Sports REST is included on every DepthFeed tier; Quant, Desk Lite, and Desk add one, two, and three live sports books.
- 01
Get a Desk key
Use a paid key or request a seven-day production evaluation.
- 02
Browse MLS markets
Filter the live catalog, then choose the outcome asset you want to follow.
- 03
Pull or stream depth
Fetch the latest complete ladder over REST, or subscribe to the same book over WebSocket.
mls.sh
# Browse live MLS markets
$ curl -s -H "Authorization: Bearer $KEY" \
"https://api.depthfeed.com/v3/sports/markets?league=mls&limit=25"
# Pull the latest full book for an outcome asset
$ curl -s -H "Authorization: Bearer $KEY" \
"https://api.depthfeed.com/v3/sports/books/<asset_id>/latest"Complete ladders·REST + WebSocket·Desk access
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 DepthFeed carries normalized multi-book closing odds 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. DepthFeed'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
DepthFeed records the live MLS order book on Polymarket and Kalshi — both sides, every level, continuously — 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
Choose capacity, not venues
One account and one API for the complete DepthFeed lineup. Polymarket and Kalshi sports coverage ships together; tiers change history, throughput, and live-book concurrency.
Explorer
$0free, no card
A limited sample of the complete DepthFeed API.
Start free- 7-day unified history
- Sports REST: Polymarket + Kalshi
- Read-only API, 1 req/sec
- Sub-second event-driven snapshots
- BTC markets (latest, capped)
- Live WebSocket stream: 1 BTC subscription
- Backtest Lab + 1 paper-trading strategy
Quant
Most popular$29per month
Every venue, with room to build.
Get Quant- 30-day unified history, all assets
- Every supported venue — no add-ons
- Sports REST + injury webhooks + 1 live sports book
- Full bid/ask book depth
- Any interval: 1m, 5m, 1h… or raw ticks
- API 25 req/sec, 1,000 req/min
- Underlying price stamped per snapshot
- Live WebSocket stream: 5 subscriptions, 1 connection, every venue
- Backtest Lab + 5 paper-trading strategies (webhook signals)
Desk Lite
$79per month
3× the history, 2× the throughput of Quant.
Get Desk Lite- 90-day unified history (3× Quant)
- API 50 req/sec, 3,000 req/min
- Everything in Quant
- Every supported venue — no add-ons
- Sports REST + 2 live sports books
- Live WebSocket: 25 subscriptions, 2 connections
- 15 paper-trading strategies
Desk
Full archive$200per month
Dedicated capacity for systematic desks.
Get Desk- Full historical archive — our deepest window
- Sports full archive across every supported league
- Dedicated capacity, 100 req/sec
- 6,000 req/min sustained
- Everything in Desk Lite
- Priority backfill requests
- Live WebSocket: 100 subscriptions, 5 connections, wildcards + 3 sports books
- 7-day production-latency evaluation available on request
- 40 paper-trading strategies
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, full ladders, sportsbook odds, scores, and injuries — one DepthFeed account, with a seven-day Desk evaluation available for production benchmarking.