Polymarket golf data: 7k markets and a 250ms record

Golf trades on Polymarket as tournament and matchup questions. Like every sport on the exchange, the live book is free to read from the official API, and it is the only version the API will ever serve.

Because the official /book has no date parameter, the historical answer for a golf weekend — 'how did the field's prices move across four rounds?' — exists only if depth was recorded during play. PolyOrderbooks captures the full ladder four times per second for the golf series it lists.

Golf is the smallest of the individually counted families, but the record is identical to the rest of the catalog: every tournament and matchup market resolves to full bid/ask ladders with sizes, a captured_at timestamp, and the winning outcome once settled.

The validation date for these coverage figures is 2026-09-27, and the per-family counts are indicative sizes from the sports data page rather than a strict partition.

• Live ladder — official /book, free and keyless, current moment only (what the API serves).
• Historical depth — full L2 books at 250ms over REST, free Starter with 3 days, paid windows to 120 days.
• Discovery — /v1/series for golf tours; /v1/markets for questions and slugs.
• Coverage — measured counts per sport on the sports data page.

A DP World Tour event runs four days, and the winner market barely moves on Thursday — then the Sunday back nine reprises it with every birdie. The official API captures the live ladder only; the archive keeps all four rounds available for a final-round replay nobody could have pulled live.

Golf trades as tournament winners and matchups, each settling at the last putt. The multi-day arc separates it from the quarter-style sports: the where did the public position form question is answerable week by week from the preserved book.

The measured questions that fit the record include: whether Sunday front-nine leaderstighten before back-nine pressure, whether matchup markets straddle the leaderboard better than outrights, and whether rain-delay restarts reprice fliers upward for an hour before normalising.

To pull a Sunday: /v1/series for the tour event, /v1/markets for the winner question, then the archive query on the final round — full ladders with sizes from the first grouping of the day to the last putt.

The front-to-back nine split is where outrights widen and tighten; the leaders' first tee time is a marker the book respects more than the raw round score.

At ~7,000 markets golf is the smallest counted family — enough for one-event studies, too small for cross-century claims.

The tier line stays standard: 3 days free, 120 on Pro, resolved editions queryable.

Study one: measure Sunday front-nine leadertightening against the back-nine drift, splitting frames by one-sided share so the lead is read off the executable side.

Study two: replay a rain-delay restart and compare the favourite's floor before and after the break; the reprice mechanics documented in the crypto corpus are the reference.

Study three: count how many leader changes produced a fresh executable side within two holes of the change, using the four-day arc as the natural window.

One tour event is the honest sample size for this family — all four rounds fit the Pro window, and the Sunday window alone fits Starter.

The first exercise is a Sunday: pick any DP World Tour event from the series list, pull the final-round window from the archive, and count the separate repricings of the outright winner with a full shot clock. The front nine barely moves; the back nine is where the executable price earns its keep.

Then pull the matchup book at the same second as the outright and compare how much tighter the two-horse line trades on identical news. Ranking books versus winner books is the golf market's fullest lesson in one frame.

Finish by resolving the weekend's pulls and keeping every market queryable, so the event becomes the seed of a per-tour dataset rather than a fleeting screenshot.

• Sports data
• Market data
• Order book data