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

# Supported Platforms

> Data coverage and platform-specific notes

## Polymarket

The largest prediction market by volume. EventGraph ingests all the active events every 15 minutes.

* **Platform code**: `polymarket`
* **Market type**: Binary (Yes/No) and categorical
* **Price range**: `0.01` – `0.99` (implied probability)
* **Volume currency**: USDC
* **Event URL format**: `https://polymarket.com/event/{event_slug}/{market_slug}`

## Kalshi

US-regulated prediction exchange. Ingested every 15 minutes.

* **Platform code**: `kalshi`
* **Market type**: Binary and multi-outcome (multiple sub-markets per event)
* **Price range**: `0.01` – `0.99` (cents on the dollar)
* **Volume currency**: USD
* **Event URL format**: `https://kalshi.com/events/{event_id}`

<Note>
  Kalshi events often have many sub-markets (e.g. "Who wins the Senate seat?"). When using the Compare endpoint, the `sub_markets` array lists all outcomes for multi-outcome events.
</Note>

## Limitless

Fast-growing on-chain prediction market. Updated every **60 seconds** (live).

* **Platform code**: `limitless`
* **Market type**: Binary
* **Price range**: `0.00` – `1.00`
* **Volume currency**: ETH / USDC
* **Event URL format**: `https://limitless.exchange/events/{event_id}`

## OpinionTrade

Indian prediction market. Ingested every 15 minutes.

* **Platform code**: `opiniontrade`
* **Market type**: Binary and categorical
* **Volume currency**: INR
* **Event URL format**: `https://app.opinion.trade/detail?topicId={event_id}`

## Price normalization

All prices are normalized to a **0.0 – 1.0 probability scale** regardless of the source platform:

```text theme={null}
no_price = round(1 - yes_price, 4)
```

A `yes_price` of `0.65` means the market implies a **65% probability** of the event resolving YES.