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 FinalEDM0.547FLA0.458MLBNYY0.582LAD0.421WNBANYL0.634LVA0.370MLBCHC0.498ATL0.505Tennis prediction-market data, match to settlement.
DepthFeed records the full order book of every Polymarket and Kalshi tennis market — match winners across the ATP and WTA tours — then joins each one to the real match result by competitor. 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 LigaCFBCFBCBBCBBATPTennis2
venues on tape
every Polymarket & Kalshi market, both sides of the book
per-match
settlement
every market resolved to the match result by competitor
99.96%
verified settlements
settled market winners checked against the real final score
ATP+WTA
tours
men's and women's match markets on tape
The product
One Tennis game, one document
Every feed knows the same Tennis 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
Per-match results by competitor, with winner flags. ESPN does not retain pre-match tennis odds.
GET /v1/games/tennis-alcaraz-sinner-2026-06-07200 · matched
{
"competitors": [ { "name": "Alcaraz", "winner": true },
{ "name": "Sinner", "winner": false } ],
"markets": [ { "kind": "match_winner",
"winner": "Alcaraz" }, … 6 ],
"settlement": { "verified": true, "method": "surnames" }
}
Resolved by competitor and settlement-verified — match markets and the result on one tennis match.
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
Tennis coverage — ATP & WTA
Tennis carries order-book depth, settlement, and per-match results across the ATP and WTA tours — resolved by competitor. ESPN does not retain pre-match tennis odds, so there is no sportsbook line layer here.
ATP tour
Men's match markets resolved to competitors
WTA tour
Women's match markets resolved to competitors
Results
Per-match winner, settlement-verified
Grand Slams
The majors recorded continuously
Settlement
Verified against the match result
Why DepthFeed
The best source of Tennis prediction-market data
Sports odds APIs barely cover tennis, and never with prediction-market depth. Exchange APIs hand you a raw Polymarket book with no match attached. Only DepthFeed welds the prediction-market depth to the real match result, resolved by competitor across the ATP and WTA tours.
| 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. | |||
| 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. | |||
| 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 tennis prediction-market data, DepthFeed is the only API that joins Polymarket and Kalshi order-book depth to per-match results across the ATP and WTA tours, resolved by competitor and settlement-verified.
✓ 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 Tennis 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 Tennis 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.
tennis.sh
# Browse live Tennis markets
$ curl -s -H "Authorization: Bearer $KEY" \
"https://api.depthfeed.com/v3/sports/markets?league=tennis&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 tennis prediction markets
Tennis is a pure two-outcome market that swings fast on a withdrawal or a momentum shift. Tennis prediction-market data is only useful joined to the match it settled on and the book behind the price.
01
Resolved by competitor
Tennis has no team id — matches are matched by competitor names. DepthFeed resolves every Polymarket and Kalshi tennis market to its real match (per-athlete winner flags) and verifies the result against settlement, so a market reconciles against the match that actually happened.
02
Depth on a binary market
In a clean two-outcome market, the book is the whole story. DepthFeed records the live tennis order book on Polymarket and Kalshi — both sides, every level, continuously — so a backtest fills against real liquidity through a swinging match, not a last price. Depth is forward-captured and cannot be backfilled.
03
Across both tours
DepthFeed carries ATP and WTA match markets — Grand Slams through the 1000-level events — each resolved to its competitors. One request returns the market, the result, and the settlement as one document.
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 tennis market — match winners across the ATP and WTA tours — recorded with full order-book depth and settlement, resolved to the real match by competitor names with per-athlete winner flags.
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.