For Traders & Bot Developers

Cross-platform arbitrage,
finally possible

We match the same event across Polymarket, Kalshi & more. You spot the spread instantly. Sub-10ms streaming, unified schema, zero event-matching code.

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Live Demo

Cross-platform price comparison

Same events, different prices. We've already matched them for you.

Arbitrage Opportunities Live

Event	Polymarket	Kalshi	Spread
Trump wins 2024	0.52	0.48	4.0%
BTC above $100k EOY	0.67	0.63	4.0%
Fed cuts rates Jan	0.12	0.15	3.0%

Events are automatically matched across platforms using semantic similarity. No manual mapping required.

The Problem

Why unified data matters for trading

Without Probalytics

-3 different APIs with 3 different schemas
-Manual event matching (is "BTC $100k" the same as "Bitcoin to hit $100,000"?)
-Build and maintain your own normalization layer
-Weeks of engineering before you can even detect arbitrage

With Probalytics

+One API, one schema, all platforms
+Events automatically matched using semantic similarity
+Query cross-platform spreads with a single call
+Start detecting arbitrage in minutes, not weeks

arbitrage-bot.js

// Stream the SAME EVENT from ALL platforms - already matched
const events = new EventSource('https://api.probalytics.io/v1/stream/us-election-2024')
events.onmessage = (e) => {
  const event = JSON.parse(e.data)
  // event.prices = { polymarket: 0.52, kalshi: 0.48 }
  if (event.maxSpread > 0.03) executeCrossArbitrage(event)
}

Trading Features

Built for serious traders

Sub-10ms Latency

Server-Sent Events deliver price updates faster than any polling solution.

Automatic Event Matching

"BTC $100k" on Polymarket = "Bitcoin to reach $100,000" on Kalshi. We link them for you.

Cross-Platform Spreads

Query price differences across platforms with a single API call.

5 Years of History

Backtest cross-platform strategies on normalized historical data since 2020.

Performance

Speed matters in trading

~10ms

Probalytics SSE

Real-time streaming, instant updates

1-5s

API Polling

Rate limited, always behind

Variable

Direct Blockchain

Block times, reorgs, complexity

Comparison

Why traders choose Probalytics

Feature	DomeAPI	Direct APIs
Single API
Unified schema
Cross-platform event matching
Real-time SSE streaming		Varies
5+ years historical data	Limited	Varies

Start Trading Smarter

Ready to detect cross-platform arbitrage?

Start trading with unified prediction market data today.

Cross-platform arbitrage,finally possible