Kalshi Tennis Order-Book Slice — ATP / WTA / ITF

Historical Kalshi ATP, WTA and ITF singles L2 depth. Dated Parquet snapshot with up to 20 levels per side and disclosed capture gaps.

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Artifact vintage: the product page and shipped documentation state the exact coverage, row counts and known limitations. A purchase delivers the advertised frozen artifact; no future refresh is promised unless the checkout terms explicitly say so.

ATP 2026; WTA 2026 Observed partial coverage

Declared season scope; individual event-to-season mapping is unverified. This is not a complete-season archive.

ATP 2026 · Phase coverage not specified

WTA 2026 · Phase coverage not specified

Book samples:: 2026-06-21T17:24:31Z → 2026-10-02T23:59:16Z
Artifact vintage:: 2026-06-21 → 2026-10-02

UTC timestamps retain their recorded precision; dates alone identify UTC days. Vintage, observation and sports event times are separate. Capture time does not establish exchange quote freshness.

Sports event starts: start unknown → end unknown. Event dates are not inferred from these quote capture windows.

Coverage qualifications

Collection tags describe the declared product scope; exact fixture-season assignment is unverified.
Coverage of other competitions or editions is unassigned; this filter does not partition or verify individual rows.
Declared season scope; individual event-to-season mapping is unverified
Season phase coverage has not been declared
Complete-season fixture denominator has not been verified

Why the capture contract matters

Venue APIs expose useful live books, trades and price history, but they do not serve the same historical snapshot and game-context archive packaged here. Data that was not recorded during the live window cannot be recreated from a current-book endpoint later. The exact fields, cadence, venue coverage and limitations vary by product, so this page and the shipped documentation state the contract explicitly instead of calling every file complete or tick-level.

What's in the dataset

Dated snapshot: 148,585,545 depth rows · 0 trade prints · 148,585,545 total rows · book samples 2026-06-21T17:24:31Z through 2026-10-02T23:59:16Z · artifact vintage 2026-10-02; separate from observation times

✓ Dated snapshot: 148,585,545 depth rows · 0 trade prints · 148,585,545 total rows · book samples 2026-06-21T17:24:31Z through 2026-10-02T23:59:16Z · artifact vintage 2026-10-02; separate from observation times
✓ Sampled L2 depth for ATP, WTA and ITF match markets, up to 20 levels per side. The manifest gives the depth and captured-print counts, separate observation and exchange-time bounds, and measured intervals for this version. Depth is the sport's share of a global volume-ranked poll; lower-volume markets can be absent while open. A zero print count describes this recorder's coverage, not whether the exchange publishes trades. OBSERVED_GAPS.csv reports intervals between observed slice timestamps, not confirmed collector outages or continuous coverage for each market. Historical depth sizes captured through July 19, 2026 had already lost fractional precision; rebuilding cannot restore it.
✓ Each corrected slice lists adjacent observed depth intervals over 120 seconds; this is not a completeness claim. Displayed quotes are observations, not proof of executable fills.

Research uses for this dataset

Tennis depth research

Study sampled ATP/WTA/ITF depth at variable observed intervals; bring your own event timeline.

Match and line-market books

Compare match-winner depth with the ATP game-spread and total-sets ladders using the line column (null on legacy rows); sizes captured through Jul 19 are integer-truncated.

See the real rows before you buy

We publish real sample rows — not a marketing mockup. Load them in DuckDB, inspect the schema and coverage contract, then decide.

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