Complete prediction market data, down to the millisecond.

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probalytics — clickhouse

-- Reconstruct top-of-book from the full ladder
SELECT
  timestamp,
  outcome.name                AS outcome,
  bids[1].price               AS best_bid,
  bids[1].size                AS bid_size,
  asks[1].price               AS best_ask,
  length(bids) + length(asks) AS levels
FROM orderbook_snapshots
WHERE outcome.name = 'Yes'
ORDER BY timestamp
LIMIT 10;

⌘↵ to run

timestamp	outcome	best_bid	bid_size	best_ask	ask_size	levels
10:50:00.249	Yes	0.182	2081	0.183	2080	215
10:50:00.416	Yes	0.182	2081	0.183	2080	214
10:50:00.451	Yes	0.182	2081	0.183	2080	215
10:50:00.580	Yes	0.182	2081	0.183	2080	215
10:50:00.618	Yes	0.182	2081	0.183	2080	215
10:50:00.690	Yes	0.182	2081	0.183	2080	215
10:50:00.710	Yes	0.182	2081	0.183	2080	215
10:50:00.820	Yes	0.182	2081	0.183	2080	214
10:50:00.844	Yes	0.182	2081	0.183	2080	215
10:50:01.581	Yes	0.182	2081	0.183	2080	215

10 rows · 300 read · 7 ms

Querying a small cross-platform sample. Get full Polymarket + Kalshi history with your own API key.

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· 813K+ markets Kalshi

· 40M+ markets

0M+

Markets indexed

0B+

Trades tracked

0M+

Orderbook snapshots/day

0ms

Orderbook resolution

Sample & schema

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Browse real sample rows and the full typed schema for every table — identical across Polymarket and Kalshi. Download a sample before you write a line of code.

market_id	market_platform_id	platform	outcome	bids	asks	timestamp	indexed_at
cfb70173-5f8c-570f-b15b-d7333b5ec3ed	0x7ad403c3508f8e3912940fd1a913f227591145ca0614074208e0b962d5fcc422	POLYMARKET	{"id":"329d14b7-da9c-598b-8b7d-ce2833117e07","platform_id":"16040015440196279900485035793550429453516625694844857319147506590755961451627",…	[{"price":0.182,"size":2080.68},{"price":0.181,"size":2692.99},{"price":0.18,"size":11625.09},{"price":0.179,"size":22538},{"price":0.178,"…	[{"price":0.183,"size":2080.06},{"price":0.184,"size":10448.5},{"price":0.185,"size":405},{"price":0.186,"size":4312},{"price":0.187,"size"…	2026-05-31 10:50:00.249000000	2026-05-31 11:18:45.188847917
cfb70173-5f8c-570f-b15b-d7333b5ec3ed	0x7ad403c3508f8e3912940fd1a913f227591145ca0614074208e0b962d5fcc422	POLYMARKET	{"id":"3b5074c7-0543-5c0a-ae9e-40af7dae03bb","platform_id":"94476829201604408463453426454480212459887267917122244941405244686637914508323",…	[{"price":0.817,"size":2080.06},{"price":0.816,"size":10448.5},{"price":0.815,"size":405},{"price":0.814,"size":4312},{"price":0.813,"size"…	[{"price":0.818,"size":2080.68},{"price":0.819,"size":2692.99},{"price":0.82,"size":11625.09},{"price":0.821,"size":22538},{"price":0.822,"…	2026-05-31 10:50:00.249000000	2026-05-31 11:20:38.431367012
cfb70173-5f8c-570f-b15b-d7333b5ec3ed	0x7ad403c3508f8e3912940fd1a913f227591145ca0614074208e0b962d5fcc422	POLYMARKET	{"id":"329d14b7-da9c-598b-8b7d-ce2833117e07","platform_id":"16040015440196279900485035793550429453516625694844857319147506590755961451627",…	[{"price":0.182,"size":2080.68},{"price":0.181,"size":2692.99},{"price":0.18,"size":11625.09},{"price":0.179,"size":22538},{"price":0.178,"…	[{"price":0.183,"size":2080.06},{"price":0.184,"size":10448.5},{"price":0.185,"size":405},{"price":0.186,"size":4312},{"price":0.187,"size"…	2026-05-31 10:50:00.416000000	2026-05-31 11:18:45.188926365
cfb70173-5f8c-570f-b15b-d7333b5ec3ed	0x7ad403c3508f8e3912940fd1a913f227591145ca0614074208e0b962d5fcc422	POLYMARKET	{"id":"3b5074c7-0543-5c0a-ae9e-40af7dae03bb","platform_id":"94476829201604408463453426454480212459887267917122244941405244686637914508323",…	[{"price":0.817,"size":2080.06},{"price":0.816,"size":10448.5},{"price":0.815,"size":405},{"price":0.814,"size":4312},{"price":0.813,"size"…	[{"price":0.818,"size":2080.68},{"price":0.819,"size":2692.99},{"price":0.82,"size":11625.09},{"price":0.821,"size":22538},{"price":0.822,"…	2026-05-31 10:50:00.416000000	2026-05-31 11:20:38.431555396
cfb70173-5f8c-570f-b15b-d7333b5ec3ed	0x7ad403c3508f8e3912940fd1a913f227591145ca0614074208e0b962d5fcc422	POLYMARKET	{"id":"329d14b7-da9c-598b-8b7d-ce2833117e07","platform_id":"16040015440196279900485035793550429453516625694844857319147506590755961451627",…	[{"price":0.182,"size":2080.68},{"price":0.181,"size":2692.99},{"price":0.18,"size":11625.09},{"price":0.179,"size":22538},{"price":0.178,"…	[{"price":0.183,"size":2080.06},{"price":0.184,"size":10448.5},{"price":0.185,"size":405},{"price":0.186,"size":4312},{"price":0.187,"size"…	2026-05-31 10:50:00.451000000	2026-05-31 11:18:45.189000076
cfb70173-5f8c-570f-b15b-d7333b5ec3ed	0x7ad403c3508f8e3912940fd1a913f227591145ca0614074208e0b962d5fcc422	POLYMARKET	{"id":"3b5074c7-0543-5c0a-ae9e-40af7dae03bb","platform_id":"94476829201604408463453426454480212459887267917122244941405244686637914508323",…	[{"price":0.817,"size":2080.06},{"price":0.816,"size":10448.5},{"price":0.815,"size":405},{"price":0.814,"size":4312},{"price":0.813,"size"…	[{"price":0.818,"size":2080.68},{"price":0.819,"size":2692.99},{"price":0.82,"size":11625.09},{"price":0.821,"size":22538},{"price":0.822,"…	2026-05-31 10:50:00.451000000	2026-05-31 11:20:38.431748717
cfb70173-5f8c-570f-b15b-d7333b5ec3ed	0x7ad403c3508f8e3912940fd1a913f227591145ca0614074208e0b962d5fcc422	POLYMARKET	{"id":"329d14b7-da9c-598b-8b7d-ce2833117e07","platform_id":"16040015440196279900485035793550429453516625694844857319147506590755961451627",…	[{"price":0.182,"size":2080.68},{"price":0.181,"size":2692.99},{"price":0.18,"size":11625.09},{"price":0.179,"size":22538},{"price":0.178,"…	[{"price":0.183,"size":2080.06},{"price":0.184,"size":10448.5},{"price":0.185,"size":405},{"price":0.186,"size":4312},{"price":0.187,"size"…	2026-05-31 10:50:00.580000000	2026-05-31 11:18:45.189073878
cfb70173-5f8c-570f-b15b-d7333b5ec3ed	0x7ad403c3508f8e3912940fd1a913f227591145ca0614074208e0b962d5fcc422	POLYMARKET	{"id":"3b5074c7-0543-5c0a-ae9e-40af7dae03bb","platform_id":"94476829201604408463453426454480212459887267917122244941405244686637914508323",…	[{"price":0.817,"size":2080.06},{"price":0.816,"size":10448.5},{"price":0.815,"size":405},{"price":0.814,"size":4312},{"price":0.813,"size"…	[{"price":0.818,"size":2080.68},{"price":0.819,"size":2692.99},{"price":0.82,"size":11625.09},{"price":0.821,"size":22538},{"price":0.822,"…	2026-05-31 10:50:00.580000000	2026-05-31 11:20:38.432045175
cfb70173-5f8c-570f-b15b-d7333b5ec3ed	0x7ad403c3508f8e3912940fd1a913f227591145ca0614074208e0b962d5fcc422	POLYMARKET	{"id":"329d14b7-da9c-598b-8b7d-ce2833117e07","platform_id":"16040015440196279900485035793550429453516625694844857319147506590755961451627",…	[{"price":0.182,"size":2080.68},{"price":0.181,"size":2692.99},{"price":0.18,"size":11625.09},{"price":0.179,"size":22538},{"price":0.178,"…	[{"price":0.183,"size":2080.06},{"price":0.184,"size":10448.5},{"price":0.185,"size":405},{"price":0.186,"size":4312},{"price":0.187,"size"…	2026-05-31 10:50:00.618000000	2026-05-31 11:18:45.189193619
cfb70173-5f8c-570f-b15b-d7333b5ec3ed	0x7ad403c3508f8e3912940fd1a913f227591145ca0614074208e0b962d5fcc422	POLYMARKET	{"id":"3b5074c7-0543-5c0a-ae9e-40af7dae03bb","platform_id":"94476829201604408463453426454480212459887267917122244941405244686637914508323",…	[{"price":0.817,"size":2080.06},{"price":0.816,"size":10448.5},{"price":0.815,"size":405},{"price":0.814,"size":4312},{"price":0.813,"size"…	[{"price":0.818,"size":2080.68},{"price":0.819,"size":2692.99},{"price":0.82,"size":11625.09},{"price":0.821,"size":22538},{"price":0.822,"…	2026-05-31 10:50:00.618000000	2026-05-31 11:20:38.432363055
cfb70173-5f8c-570f-b15b-d7333b5ec3ed	0x7ad403c3508f8e3912940fd1a913f227591145ca0614074208e0b962d5fcc422	POLYMARKET	{"id":"329d14b7-da9c-598b-8b7d-ce2833117e07","platform_id":"16040015440196279900485035793550429453516625694844857319147506590755961451627",…	[{"price":0.182,"size":2080.68},{"price":0.181,"size":2692.99},{"price":0.18,"size":11625.09},{"price":0.179,"size":22538},{"price":0.178,"…	[{"price":0.183,"size":2080.06},{"price":0.184,"size":10448.5},{"price":0.185,"size":405},{"price":0.186,"size":4312},{"price":0.187,"size"…	2026-05-31 10:50:00.690000000	2026-05-31 11:18:45.189281121
cfb70173-5f8c-570f-b15b-d7333b5ec3ed	0x7ad403c3508f8e3912940fd1a913f227591145ca0614074208e0b962d5fcc422	POLYMARKET	{"id":"3b5074c7-0543-5c0a-ae9e-40af7dae03bb","platform_id":"94476829201604408463453426454480212459887267917122244941405244686637914508323",…	[{"price":0.817,"size":2080.06},{"price":0.816,"size":10448.5},{"price":0.815,"size":405},{"price":0.814,"size":4312},{"price":0.813,"size"…	[{"price":0.818,"size":2080.68},{"price":0.819,"size":2692.99},{"price":0.82,"size":11625.09},{"price":0.821,"size":22538},{"price":0.822,"…	2026-05-31 10:50:00.690000000	2026-05-31 11:20:38.432679322
cfb70173-5f8c-570f-b15b-d7333b5ec3ed	0x7ad403c3508f8e3912940fd1a913f227591145ca0614074208e0b962d5fcc422	POLYMARKET	{"id":"329d14b7-da9c-598b-8b7d-ce2833117e07","platform_id":"16040015440196279900485035793550429453516625694844857319147506590755961451627",…	[{"price":0.182,"size":2080.68},{"price":0.181,"size":2692.99},{"price":0.18,"size":11625.09},{"price":0.179,"size":22538},{"price":0.178,"…	[{"price":0.183,"size":2080.06},{"price":0.184,"size":10448.5},{"price":0.185,"size":405},{"price":0.186,"size":4312},{"price":0.187,"size"…	2026-05-31 10:50:00.710000000	2026-05-31 11:18:45.189352488
cfb70173-5f8c-570f-b15b-d7333b5ec3ed	0x7ad403c3508f8e3912940fd1a913f227591145ca0614074208e0b962d5fcc422	POLYMARKET	{"id":"3b5074c7-0543-5c0a-ae9e-40af7dae03bb","platform_id":"94476829201604408463453426454480212459887267917122244941405244686637914508323",…	[{"price":0.817,"size":2080.06},{"price":0.816,"size":10448.5},{"price":0.815,"size":405},{"price":0.814,"size":4312},{"price":0.813,"size"…	[{"price":0.818,"size":2080.68},{"price":0.819,"size":2692.99},{"price":0.82,"size":11625.09},{"price":0.821,"size":22538},{"price":0.822,"…	2026-05-31 10:50:00.710000000	2026-05-31 11:20:38.432891853
cfb70173-5f8c-570f-b15b-d7333b5ec3ed	0x7ad403c3508f8e3912940fd1a913f227591145ca0614074208e0b962d5fcc422	POLYMARKET	{"id":"329d14b7-da9c-598b-8b7d-ce2833117e07","platform_id":"16040015440196279900485035793550429453516625694844857319147506590755961451627",…	[{"price":0.182,"size":2080.68},{"price":0.181,"size":2692.99},{"price":0.18,"size":11625.09},{"price":0.179,"size":22538},{"price":0.178,"…	[{"price":0.183,"size":2080.06},{"price":0.184,"size":10448.5},{"price":0.185,"size":405},{"price":0.186,"size":4312},{"price":0.187,"size"…	2026-05-31 10:50:00.820000000	2026-05-31 11:18:45.189484728
cfb70173-5f8c-570f-b15b-d7333b5ec3ed	0x7ad403c3508f8e3912940fd1a913f227591145ca0614074208e0b962d5fcc422	POLYMARKET	{"id":"3b5074c7-0543-5c0a-ae9e-40af7dae03bb","platform_id":"94476829201604408463453426454480212459887267917122244941405244686637914508323",…	[{"price":0.817,"size":2080.06},{"price":0.816,"size":10448.5},{"price":0.815,"size":405},{"price":0.814,"size":4312},{"price":0.813,"size"…	[{"price":0.818,"size":2080.68},{"price":0.819,"size":2692.99},{"price":0.82,"size":11625.09},{"price":0.821,"size":22538},{"price":0.822,"…	2026-05-31 10:50:00.820000000	2026-05-31 11:20:38.433090783
cfb70173-5f8c-570f-b15b-d7333b5ec3ed	0x7ad403c3508f8e3912940fd1a913f227591145ca0614074208e0b962d5fcc422	POLYMARKET	{"id":"329d14b7-da9c-598b-8b7d-ce2833117e07","platform_id":"16040015440196279900485035793550429453516625694844857319147506590755961451627",…	[{"price":0.182,"size":2080.68},{"price":0.181,"size":2692.99},{"price":0.18,"size":11625.09},{"price":0.179,"size":22538},{"price":0.178,"…	[{"price":0.183,"size":2080.06},{"price":0.184,"size":10448.5},{"price":0.185,"size":405},{"price":0.186,"size":4312},{"price":0.187,"size"…	2026-05-31 10:50:00.844000000	2026-05-31 11:18:45.189579190
cfb70173-5f8c-570f-b15b-d7333b5ec3ed	0x7ad403c3508f8e3912940fd1a913f227591145ca0614074208e0b962d5fcc422	POLYMARKET	{"id":"3b5074c7-0543-5c0a-ae9e-40af7dae03bb","platform_id":"94476829201604408463453426454480212459887267917122244941405244686637914508323",…	[{"price":0.817,"size":2080.06},{"price":0.816,"size":10448.5},{"price":0.815,"size":405},{"price":0.814,"size":4312},{"price":0.813,"size"…	[{"price":0.818,"size":2080.68},{"price":0.819,"size":2692.99},{"price":0.82,"size":11625.09},{"price":0.821,"size":22538},{"price":0.822,"…	2026-05-31 10:50:00.844000000	2026-05-31 11:20:38.433297425
cfb70173-5f8c-570f-b15b-d7333b5ec3ed	0x7ad403c3508f8e3912940fd1a913f227591145ca0614074208e0b962d5fcc422	POLYMARKET	{"id":"329d14b7-da9c-598b-8b7d-ce2833117e07","platform_id":"16040015440196279900485035793550429453516625694844857319147506590755961451627",…	[{"price":0.182,"size":2080.68},{"price":0.181,"size":2692.99},{"price":0.18,"size":11625.09},{"price":0.179,"size":22538},{"price":0.178,"…	[{"price":0.183,"size":2080.06},{"price":0.184,"size":10448.5},{"price":0.185,"size":405},{"price":0.186,"size":4312},{"price":0.187,"size"…	2026-05-31 10:50:01.581000000	2026-05-31 11:18:45.189644008
cfb70173-5f8c-570f-b15b-d7333b5ec3ed	0x7ad403c3508f8e3912940fd1a913f227591145ca0614074208e0b962d5fcc422	POLYMARKET	{"id":"3b5074c7-0543-5c0a-ae9e-40af7dae03bb","platform_id":"94476829201604408463453426454480212459887267917122244941405244686637914508323",…	[{"price":0.817,"size":2080.06},{"price":0.816,"size":10448.5},{"price":0.815,"size":405},{"price":0.814,"size":4312},{"price":0.813,"size"…	[{"price":0.818,"size":2080.68},{"price":0.819,"size":2692.99},{"price":0.82,"size":11625.09},{"price":0.821,"size":22538},{"price":0.822,"…	2026-05-31 10:50:01.581000000	2026-05-31 11:20:38.433503496
cfb70173-5f8c-570f-b15b-d7333b5ec3ed	0x7ad403c3508f8e3912940fd1a913f227591145ca0614074208e0b962d5fcc422	POLYMARKET	{"id":"329d14b7-da9c-598b-8b7d-ce2833117e07","platform_id":"16040015440196279900485035793550429453516625694844857319147506590755961451627",…	[{"price":0.182,"size":2080.68},{"price":0.181,"size":2692.99},{"price":0.18,"size":11625.09},{"price":0.179,"size":22538},{"price":0.178,"…	[{"price":0.183,"size":2080.06},{"price":0.184,"size":10448.5},{"price":0.185,"size":405},{"price":0.186,"size":4312},{"price":0.187,"size"…	2026-05-31 10:50:01.618000000	2026-05-31 11:18:45.189743008
cfb70173-5f8c-570f-b15b-d7333b5ec3ed	0x7ad403c3508f8e3912940fd1a913f227591145ca0614074208e0b962d5fcc422	POLYMARKET	{"id":"3b5074c7-0543-5c0a-ae9e-40af7dae03bb","platform_id":"94476829201604408463453426454480212459887267917122244941405244686637914508323",…	[{"price":0.817,"size":2080.06},{"price":0.816,"size":10448.5},{"price":0.815,"size":405},{"price":0.814,"size":4312},{"price":0.813,"size"…	[{"price":0.818,"size":2080.68},{"price":0.819,"size":2692.99},{"price":0.82,"size":11625.09},{"price":0.821,"size":22538},{"price":0.822,"…	2026-05-31 10:50:01.618000000	2026-05-31 11:20:38.433707424
cfb70173-5f8c-570f-b15b-d7333b5ec3ed	0x7ad403c3508f8e3912940fd1a913f227591145ca0614074208e0b962d5fcc422	POLYMARKET	{"id":"329d14b7-da9c-598b-8b7d-ce2833117e07","platform_id":"16040015440196279900485035793550429453516625694844857319147506590755961451627",…	[{"price":0.182,"size":2080.68},{"price":0.181,"size":2692.99},{"price":0.18,"size":11625.09},{"price":0.179,"size":22538},{"price":0.178,"…	[{"price":0.183,"size":2080.06},{"price":0.184,"size":10448.5},{"price":0.185,"size":405},{"price":0.186,"size":4312},{"price":0.187,"size"…	2026-05-31 10:50:01.686000000	2026-05-31 11:18:45.189815447
cfb70173-5f8c-570f-b15b-d7333b5ec3ed	0x7ad403c3508f8e3912940fd1a913f227591145ca0614074208e0b962d5fcc422	POLYMARKET	{"id":"3b5074c7-0543-5c0a-ae9e-40af7dae03bb","platform_id":"94476829201604408463453426454480212459887267917122244941405244686637914508323",…	[{"price":0.817,"size":2080.06},{"price":0.816,"size":10448.5},{"price":0.815,"size":405},{"price":0.814,"size":4312},{"price":0.813,"size"…	[{"price":0.818,"size":2080.68},{"price":0.819,"size":2692.99},{"price":0.82,"size":11625.09},{"price":0.821,"size":22538},{"price":0.822,"…	2026-05-31 10:50:01.686000000	2026-05-31 11:20:38.433910941
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40 rows · 8 columns · sample

Full data in docs Download CSV

The Problem

Prediction market data is hard to work with

Every venue ships different APIs and formats, history is shallow and low-resolution, and building reliable infrastructure yourself takes months.

Per-venue APIs

Polymarket and Kalshi expose different APIs, auth, and schemas — you normalize each one yourself.

No order book history

Order books are real-time only — miss the moment and it's gone. There's no historical book to backtest against.

Uneven history

Backfills are incomplete, with gaps around resolutions, reorgs, and renames.

Heavy to self-host

Capturing every book means hundreds of TBs of storage, blockchain indexing, and ETL — months of undifferentiated work.

The Solution

One queryable warehouse for Polymarket and Kalshi

Clean, normalized trades and tick-level historical order books across venues — query it in ClickHouse SQL, fetch via REST, or export Parquet. No pipelines to build.

Unified Schema

One consistent data model across Polymarket and Kalshi. No per-venue formats to reconcile.

Orderbook Data

New

A tick-level historical book at 1ms you can replay — not a real-time feed you have to capture. Up to 900M+ snapshots/day.

ClickHouse SQL

Query Polymarket and Kalshi data together without building ETL, joins, or file pipelines.

Simple API

Clean REST endpoints and Parquet exports. Fetch exactly the data you need.

View all features

Tick-Level Historical Orderbook Data

A historical order book, not just a real-time feed

Most providers only stream the book live — miss the moment and it's gone. We persist full bid/ask depth at 1ms, so you can replay the exact state of any market at any past point in time. Query in ClickHouse or export Parquet.

100x more granular

ProbalyticsUp to 900M+ / day

Competitors2-3M / day

1ms

LOCF resolution

Nov '25

Data from

Parquet

Export format

Backtesting

Replay exact orderbook state at any millisecond. Realistic slippage and fill simulation.

Market Microstructure

Study bid-ask spreads, liquidity depth, and order flow patterns at tick level.

Liquidity Analysis

Track how liquidity evolves around events, news, and resolutions.

ML Features

Build features from orderbook imbalance, depth ratios, and spread dynamics.

Explore orderbook data

Developer Experience

Start building in minutes

Get your API key and start querying immediately. Use SQL for research, REST for products, and bulk downloads for offline analysis.

Get your API key

Make a request

Simple fetch calls to our REST API

Query your data

REST API, SQL, or bulk file downloads

app.js

// Fetch prediction markets
const res = await fetch('https://api.probalytics.io/api/v1/markets', {
  headers: { 'Authorization': 'Bearer api_xxx:sk_xxx' }
})
const { data: markets } = await res.json()

// Fetch trades for a market
const trades = await fetch(
  'https://api.probalytics.io/api/v1/fills?market_id=...',
  { headers: { 'Authorization': 'Bearer api_xxx:sk_xxx' } }
)

Coverage

All major platforms, one API

Platform	Status	Markets	Since
Polymarket	Live	813K+	2020
Kalshi	Live	40M+	2021
Metaculus	Soon	—	—
Manifold	Soon	—	—

Who it's for

Built for traders, researchers, and builders

Whatever you're working on, start from the same clean, cross-platform data — then use the access method that fits.

Explore use cases

Now Available

Ready to get started?

Start building with unified prediction market data today.

Start free trial