▌tickfoundry
capture livesign inget the data →
kalshi historical data / sports / KXMLBNLHAARON
§sports

Pro Baseball American League Hank Aaron, tick by tick.
Kalshi series KXMLBNLHAARON: order book and trades, 2026-09-27 → 2026-10-23.

The order-book and trade history of Kalshi's Pro Baseball American League Hank Aaron series (a new event every year): top of book on every change, the 25-level book on every change in YES terms, every trade with the taker's side, and Kalshi's own ticker, with exchange timestamps to the millisecond. Captured by us from Kalshi's websocket on two independent legs and checked against the exchange's own book snapshots.

27 days2026-09-27 → 2026-10-23 · every day since its first · ~896 kB per day · 24 MB on disk · 51 open markets
pull KXMLBNLHAARON days →schemapricing

What a KXMLBNLHAARON day contains

Four parquet files per day, every market of the series in each. Sizes are this series' own averages over its 27 days on disk.

Top of book (every change)kalshi_l1

Best YES bid and ask with sizes and the spread, one row whenever either changed, derived tick by tick from the rebuilt book: not Kalshi's conflated ticker.

~47 kB per KXMLBNLHAARON day
Order book, 25 levels, every changekalshi_l2

The whole ladder after every book event, in YES terms (the NO bids become the asks, at their sizes), 25 levels a side: wide columns bid_px_1 … ask_sz_25, plus the exchange's own hourly snapshots. Each row is self-contained, so you can start reading mid-day.

~793 kB per KXMLBNLHAARON day
Tradeskalshi_trades

Every trade: YES and NO price, size in contracts, the taker's side, block-trade flag, trade id.

~7 kB per KXMLBNLHAARON day
Kalshi ticker (~1 s)kalshi_ticker

Kalshi's own ticker feed, about one update a second per market: last price, YES bid/ask with sizes, cumulative volume and open interest in contracts and dollars.

~49 kB per KXMLBNLHAARON day

KXMLBNLHAARON markets

The 12 closing nearest to now, from Kalshi's daily market list. Each is a row key (market_ticker) in every table, captured from the day it opens until it settles.

Will Alex Bregman win NL Hank Aaron Award?: Alex BregmanKXMLBNLHAARON-26-ABREcloses 2026-12-08 15:00 UTC
Will Bo Bichette win NL Hank Aaron Award?: Bo BichetteKXMLBNLHAARON-26-BBICcloses 2026-12-08 15:00 UTC
Will Bryce Harper win NL Hank Aaron Award?: Bryce HarperKXMLBNLHAARON-26-BHARcloses 2026-12-08 15:00 UTC
Will Brice Turang win NL Hank Aaron Award?: Brice TurangKXMLBNLHAARON-26-BTURcloses 2026-12-08 15:00 UTC
Will Corbin Carroll win NL Hank Aaron Award?: Corbin CarrollKXMLBNLHAARON-26-CCARcloses 2026-12-08 15:00 UTC
Will Caleb Durbin win NL Hank Aaron Award?: Caleb DurbinKXMLBNLHAARON-26-CDURcloses 2026-12-08 15:00 UTC
Will Christian Yelich win NL Hank Aaron Award?: Christian YelichKXMLBNLHAARON-26-CYELcloses 2026-12-08 15:00 UTC
Will Drake Baldwin win NL Hank Aaron Award: Drake BaldwinKXMLBNLHAARON-26-DBALcloses 2026-12-08 15:00 UTC
Will Dansby Swanson win NL Hank Aaron Award?: Dansby SwansonKXMLBNLHAARON-26-DSWAcloses 2026-12-08 15:00 UTC
Will Elly De La Cruz win NL Hank Aaron Award?: Elly De La CruzKXMLBNLHAARON-26-ECRUcloses 2026-12-08 15:00 UTC
Will Freddie Freeman win NL Hank Aaron Award?: Freddie FreemanKXMLBNLHAARON-26-FFREcloses 2026-12-08 15:00 UTC
Will Francisco Lindor win NL Hank Aaron Award?: Francisco LindorKXMLBNLHAARON-26-FLINcloses 2026-12-08 15:00 UTC

Coverage notes for KXMLBNLHAARON

  • First day on disk: 2026-09-27. That is the day our Kalshi capture began, not the series' launch. New days are added daily.
  • Trades before 2026-09-27. Kalshi's historical API has no tick-level order book, so earlier KXMLBNLHAARON trades are in the whole-exchange trades history (from 2021-06-30, one file a day): filter market_ticker to this series' markets, which start with KXMLBNLHAARON-.
  • The first day starts at 11:00 UTC. Our capture began at 11:00 UTC on 27 September 2026: 13 hours that day, not 24, and no CF Benchmarks index file (that capture starts on the 28th).
  • A book-quality dip on 2026-09-29. During a pipeline cutover 10,255 exchange snapshots disagreed with the rebuilt book (41 to 1,378 on every other day) and 16,678 negative levels were clamped to zero. The book resynchronises at every exchange snapshot; trades and ticker are unaffected.
  • Every bundle ships a README with the schemas and, per day, how often the rebuilt book matched the exchange's own snapshots, for your exact range.

Pricing

A month of KXMLBNLHAARON, every table, is about 26 MB. Bought for Kalshi, Starter ($29/mo) carries top of book, trades and the ticker for every series plus one series of your choice, KXMLBNLHAARON if you like, at full book depth; L10 ($49/mo) carries every series' book at 10 levels and L25 ($99/mo) the full 25-level book. Each includes 7 days before you join and every day after. Any free account can pull 2026-10-07, any series, up to 1.0 GB.

Starter: KXMLBNLHAARON at full depth →L10: every series at 10 levelsL25: every series, 25 levelsfree sample day

Other sports series on Kalshi

College Football SpreadCollege Football Total PointsITF Women's MatchITF Men's MatchCounter-Strike 2 GameNBA TotalCollege Football Team Total PointsNBA SpreadPro Football SpreadCollege Football GameChallenger ATPCollege Football 1st Half SpreadPro Football Receiving YardsPGA TourPro Football Total PointsNHL Total GoalsCounter-Strike 2 Map WinnerPro Football Rushing YardsCollege Football 1st Half TotalCollege Football 2nd Half Spread… the whole venue