Betstamp delivers Underdog Predict's markets through one API: live prices, normalized next to a fair-value line built from 200+ sportsbooks, ready to store for your own historical data. Underdog Predict doesn't publish a public data API. Betstamp shows you where Underdog Predict disagrees with the rest of the market.
Live Underdog Predict odds and contract prices across every league we match, next to the sportsbook line.
| Coverage | Pre-game + Live |
|---|---|
| Markets priced | ~1.4M market selections per month |
| Leagues (14) | MLB, NCAAF, NFL, WNBA, NHL, MLS, Tennis, La Liga, EPL, Serie A, Ligue 1, Bundesliga, NBA, UFC |
| Market types | Moneyline, Spread, Total, Player Props, Game Props |
| Player props | Yes — MLB, NFL, WNBA, NHL, NBA |
| Price formats | Decimal · American |
| Delivery | REST pull + SSE stream |
Underdog Predict doesn't publish a public data API. Betstamp's Underdog Predict feed gives you live Underdog Predict prices, matched to the same events as 200+ sportsbooks, with a fair-value line beside every market — store them as they arrive and you have your own historical Underdog Predict record.
| Feature | Underdog Predict | Betstamp |
|---|---|---|
| Venues | Underdog Predict only | Underdog Predict plus 200+ sportsbooks and other exchanges |
| Price format | Contract prices (0–100¢) | Decimal and American odds, normalized across every venue |
| Fair value | Not provided | No-vig line from sharp books, per market |
| Event matching | You map events yourself | Events and markets already matched across venues |
| Public data API | None | REST + SSE |
Underdog Predict's prices mean more next to everyone else's. Betstamp puts them there.
Where to quote, from sharp-book consensus: Betstamp's True Line, a no-vig price, sits next to every Underdog Predict price.
The /api/markets endpoint takes a book_ids parameter — comma-separate Underdog Predict alongside Polymarket, Kalshi, ProphetX, Novig, bet365, FanDuel and any other book in your subscription. One call returns all of them in one normalized schema.
Underdog Predict markets are already matched to the sportsbook event and market, so you're comparing like with like.
Every Underdog Predict record arrives in one stable schema, so you can store it from the day you subscribe and build your own historical Underdog Predict data for backtesting. In the PRO Odds Screen, see how each Underdog Predict price has moved on every market.
Pull Underdog Predict into the PRO Odds Screen, the Betstamp API, or both — same pricing, same refresh rate, same normalized schema. Pick the delivery that fits your stack, switch later if it changes.
99.99% uptime SLA on the Underdog Predict feed. Slack channel with our trading desk. Schema changes upstream don't break your pipeline — we handle the maintenance.
A contract at 62¢ implies a 62% probability. Decimal odds = 1 / 0.62 = 1.61. American odds = −(62 / 38) × 100 = −163. Before comparing with a sportsbook, strip the book's vig so both sides are fair probabilities — that's what Betstamp's True Line does for every market. Try it with the no-vig fair odds calculator.
If you can hit a REST endpoint, you can pull Underdog Predict prices. Three steps, one key, the same schema as every other venue.
Request a demo, scope your usage, and we issue a key scoped to Underdog Predict plus any other books you need. Trial keys available for evaluation.
A single GET on /api/markets returns Underdog Predict markets for the league and periods you specify. Filter by bet_types, is_live and book_ids.
Connect to /v1/markets via Server-Sent Events to receive Underdog Predict price moves as they happen — one JSON object per data: message. No polling, no client-side queue.
# Pull NFL moneyline markets for Underdog Predict curl -H "X-API-KEY: $BETSTAMP_API_KEY" \ "https://api.pro.betstamp.com/api/markets?league=NFL&book_ids=196&bet_types=moneyline&periods=FT&include=american"
import os, requests resp = requests.get( "https://api.pro.betstamp.com/api/markets", headers={"X-API-KEY": os.environ["BETSTAMP_API_KEY"]}, params={"league": "NFL", "book_ids": "196", "bet_types": "moneyline", "periods": "FT", "include": "american"}, ) markets = resp.json()["markets"]
const params = new URLSearchParams({ league: 'NFL', book_ids: '196', bet_types: 'moneyline', periods: 'FT', include: 'american', }); const res = await fetch(`https://api.pro.betstamp.com/api/markets?${params}`, { headers: { 'X-API-KEY': process.env.BETSTAMP_API_KEY }, }); const { markets } = await res.json();
# Response (real schema, truncated) { "markets": [ { "id": "0192b4a1-8f13-7c2b-8629-aa3ef295e2f0", "odds": 1.91, "american": "-110", "side": "DAL", "side_type": "Away", "bet_type": "Moneyline", "period": "FT", "league": "NFL", "is_alt": false, "is_live": false, "odd_provider_id": 196, "fixture_id": "01926d5e-819d-7b33-b7ff-bbe89e134958", "team_id": "0191b82a-3435-7e85-95d0-7b3be256709e" } ] }
Market makers want an API to quote from. Pricing teams want JSON. Traders want a screen. Every Betstamp Underdog Predict feed ships in every form — same data, same refresh, same delivery SLA.
See Underdog Predict pricing side-by-side with 200+ books in the Betstamp PRO Odds Screen. Main lines, player props, and alternates — refreshed in real time and benchmarked against our True Line. The fastest way to find where Underdog Predict is off-market.
The Underdog Predict data API for market makers, trading desks and quant teams. Live Underdog Predict prices via REST pull or SSE stream — structured JSON, matched to the same events and markets as 200+ other books. Store every record from day one to build your own historical Underdog Predict data.
/api/markets + SSE at /v1/marketsUnderdog Predict doesn't publish a public data API, and Betstamp is how you get the data. The Underdog Predict feed delivers live Underdog Predict prices via REST and SSE, normalized next to 200+ sportsbooks, and every record is yours to store.
Yes, and every record is yours to keep. From the day you subscribe, every Underdog Predict price arrives in the same schema as live, so you can store it and build a complete historical Underdog Predict record. The PRO Odds Screen also shows how each Underdog Predict price has moved on every market. Betstamp doesn't provide backfills from before your subscription starts.
Divide the contract price in cents by 100 for implied probability. For a 62¢ contract: 62% → decimal 1.61 → American −163. Betstamp returns decimal and American odds in every record.
Betstamp's Underdog Predict feed is built for sports: moneyline, spread, total, player props, game props across 14 leagues, pre-game and live, with 1.4M+ market selections priced in the last 30 days and every one matched to the same event as 200+ sportsbooks.
Yes. Every venue is matched to the same events, so Underdog Predict, Polymarket and Kalshi prices sit in one response alongside the sportsbook line.
Browse the venues trading desks, market makers, and quant teams pull alongside Underdog Predict — or jump to the full list of 200+.