Prediction market data.
All platforms. One API.

Probalytics aggregates, normalizes, and streams data from Polymarket, Kalshi, and more — so you can build trading bots, dashboards, and research tools without the infrastructure headache.

Get Started See how it works

Fed holds rates JuneKalshi0.72-1.3%

BTC above $200k EOYPolymarket0.24+3.4%

US GDP growth > 3%Kalshi0.38-0.8%

GPT-5 released by SepPolymarket0.56+1.2%

S&P 500 above 6500Kalshi0.42+2.7%

Fed holds rates JuneKalshi0.72-1.3%

BTC above $200k EOYPolymarket0.24+3.4%

US GDP growth > 3%Kalshi0.38-0.8%

GPT-5 released by SepPolymarket0.56+1.2%

S&P 500 above 6500Kalshi0.42+2.7%

0.0M+

Markets indexed

0.0M+

Trades tracked

0.0B+

Volume tracked

0.0%

Uptime target

The Problem

Prediction market data is a mess

Every platform has different APIs, formats, and quirks. Building reliable data infrastructure yourself takes months.

Fragmented

Different APIs, auth methods, and data formats.

Slow

Polling APIs isn't real-time. Always behind.

Incomplete

Historical data is hard to find and trust.

Complex

Blockchain indexing and reorg handling.

The Solution

Everything you need, unified

We handle the complexity. You get clean, real-time data through a single API.

Unified Schema

One consistent data model across all platforms. No more juggling different formats.

Real-Time SSE

Soon

Sub-10ms event streaming. Prices, trades, resolutions — instant delivery.

Orderbook Data

New

200-500M updates/day at 1ms resolution. The most granular historical orderbook data available.

SQL Access

Query billions of rows directly via ClickHouse. In-browser or any SQL client.

Vector Search

Soon

Find similar markets instantly with embedding-based semantic search.

Simple API

Clean REST endpoints. Just fetch the data you need.

View all features

Historical Orderbook Data

The most granular orderbook data available

Full bid/ask depth snapshots at 1-millisecond resolution. Replay the exact state of any orderbook at any point in time.

100x more granular

Probalytics200-500M / 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 fetching data. Simple REST endpoints, SQL access, and bulk downloads.

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
PredictIt	Soon	—	—
Metaculus	Soon	—	—
Manifold	Soon	—	—

Use Cases

Built for builders

Whether you're building trading bots, research tools, or analytics platforms — we've got you covered.

Trading Bots

Automated strategies across all platforms with real-time data.

Research

Years of historical data for academic and market research.

Dashboards

Build live visualizations and monitoring tools.

Explore use cases

Now Available

Ready to get started?

Start building with unified prediction market data today.

Prediction market data.All platforms. One API.