> ## Documentation Index
> Fetch the complete documentation index at: https://docs.probsights.com/llms.txt
> Use this file to discover all available pages before exploring further.

# ProbSights API

> Prediction market data across Kalshi and Polymarket.

The ProbSights API provides programmatic access to prediction market data across
Kalshi and Polymarket — including whale trades, cross-venue arbitrage, price
spreads, and full-text search.

All API requests should be made to:

```text theme={null}
https://api.probsights.com
```

## Quick start

```bash theme={null}
curl -H "X-API-Key: YOUR_API_KEY" \
  "https://api.probsights.com/arbitrage/current?min_net_cents=0.5"
```

Get a key from the [dashboard](https://probsights.com/dashboard), then use the
**Try** playground on any endpoint page to send live requests.

## What you can build

<CardGroup cols={2}>
  <Card title="Market search" icon="magnifying-glass" href="/api-reference/search-overview">
    Full-text search across series, events, and markets with filters for
    exchange, category, volume, and status.
  </Card>

  <Card title="Arbitrage scanner" icon="chart-line" href="/api-reference/arbitrage-overview">
    Find cross-venue arbitrage opportunities and price spreads between Kalshi
    and Polymarket.
  </Card>

  <Card title="Whale tracking" icon="fish" href="/api-reference/whales-overview">
    Monitor large trades across prediction markets. Track events and inspect
    whale feed and stats.
  </Card>

  <Card title="Historical data" icon="clock-rotate-left" href="/api-reference/kalshi-orderbook">
    Orderbook snapshots for Kalshi and Polymarket markets.
  </Card>
</CardGroup>