Answer

Is there a same game parlay API?

What SGP data an API can honestly give you: per-leg prices, cross-book parlay math, and correlation-adjusted estimates.

Is there a same game parlay API?

Sportsbooks price same game parlays with private correlation models, so no aggregator sells their exact SGP prices. What an API can give you is the ingredients plus honest math: ParlayAPI's POST /v1/parlay/price combines any legs across books server side and flags same-game legs, and POST /v1/sgp/price returns a correlation-adjusted estimate that names the literature source behind every pair.

More detail

The reason there is no true SGP price feed: when two legs share a game, the book applies a correlation discount it computes internally, and that adjusted price exists only inside the book's own bet slip. Multiplying the individual leg prices gives you the independent baseline, which for positively correlated legs is a lower bound on the true probability, not the price a book will offer.

POST /v1/parlay/price does the cross-book work: send legs, get one combined price per bookmaker that prices all of them, sorted best to worst, with books that cannot price a leg listed in missing_books instead of silently dropped. When two or more legs share an event it sets an SGP flag so you know the multiplication is a baseline rather than a quote.

POST /v1/sgp/price goes further: per-leg marginals, the independent baseline, and a correlation-adjusted parlay estimate using published literature coefficients, with the source named per pair. Legs no book has priced land in unpriced_legs and the estimate collapses to null rather than being filled in. A free interactive version lives at /sgp.

Endpoint

POST /v1/parlay/price

curl -X POST https://parlay-api.com/v1/parlay/price \
  -H 'X-API-Key: YOUR_KEY' -H 'Content-Type: application/json' \
  -d '{"legs": [{"sport_key": "americanfootball_nfl", "event_id": "EVENT_ID", "market": "h2h", "outcome": "Kansas City Chiefs"}, {"sport_key": "americanfootball_nfl", "event_id": "EVENT_ID", "market": "totals", "outcome": "Over", "point": 47.5}]}'

Why developers use it

Cross-book parlay pricing with per-book combined odds
SGP flag plus correlation-adjusted estimates that cite their sources
Unpriced legs are reported, never fabricated

FAQ

Can I get a sportsbook's actual SGP price via API?

No public API sells the books' internal SGP prices. Enterprise feeds such as OpticOdds advertise custom bet types at sales-call pricing (opticodds.com, read 2026-08-28); for self-serve work you build from per-leg prices and correlation estimates.

What data do I need to build an SGP model?

Per-leg player prop and game-line prices across books, plus prop history for estimating correlations. ParlayAPI serves props from 30+ sportsbooks live and archives prop closing lines for the research side.

Why do books shorten same game parlay prices?

Correlated legs win together more often than independence implies, so books discount the payout. A quarterback passing yards over combined with his team winning is the classic positively correlated pair.

/sgp /answers/player-props-api /answers/good-api-for-player-props /docs