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

# Subscribe - Market Slug Filters

> Subscribe to orders filtered by market slugs

## Overview

Filter orders by market slugs to track all trades within specific markets. Market slugs are unique identifiers for each market on Polymarket.

## Subscription Format

```json theme={null}
{
    "action": "subscribe",
    "platform": "polymarket",
    "version": 1,
    "type": "orders",
    "filters": {
        "market_slugs": [
            "btc-updown-15m-1762755300"
        ]
    }
}
```

## Parameters

* `action`: Must be `"subscribe"`
* `platform`: Must be `"polymarket"`
* `version`: Currently `1`
* `type`: Must be `"orders"`
* `filters.market_slugs`: Array of market slug strings

## Multiple Market Slugs

You can track multiple markets in a single subscription:

```json theme={null}
{
    "action": "subscribe",
    "platform": "polymarket",
    "version": 1,
    "type": "orders",
    "filters": {
        "market_slugs": [
            "btc-updown-15m-1762755300",
            "eth-price-2024-12-31"
        ]
    }
}
```

You'll receive order events when trades occur in any of the specified markets.

## Example Response

When an order matching your filter is executed, you'll receive:

```json theme={null}
{
    "type": "event",
    "subscription_id": "sub_m58zfduokmd",
    "data": {
        "token_id": "57564352641769637293436658960633624379577489846300950628596680893489126052038",
        "side": "BUY",
        "market_slug": "btc-updown-15m-1762755300",
        "condition_id": "0x592b8a416cbe36aa7bb40df85a61685ebd54ebbd2d55842f1bb398cae4f40dfc",
        "shares": 5000000,
        "shares_normalized": 5,
        "price": 0.54,
        "tx_hash": "0xd94d999336c1f579359044e2bc5fba863f240ee07ef1c6713ff69e09b67b3b13",
        "title": "Bitcoin Up or Down - November 10, 1:15AM-1:30AM ET",
        "timestamp": 1762755335,
        "order_hash": "0xf504516ab54ea46f41eaf2852f41c328e6234928f3fcfe01a9172a5908839421",
        "user": "0x6031b6eed1c97e853c6e0f03ad3ce3529351f96d"
    }
}
```

The `market_slug` field in the response will match one of the market slugs from your subscription filter.

## Finding Market Slugs

Market slugs can be found:

* In the URL of Polymarket market pages
* From the [Markets API endpoint](/api-reference/endpoint/get-markets) response
* In order event data from other subscriptions

## Use Cases

* Monitor all trading activity within specific markets
* Track market-wide order flow
* Build market-specific analytics
* Create alerts for trades in particular markets

## Related

* [Subscribe Overview](/websockets/subscribe)
* [Filter by Users](/websockets/subscribe-users)
* [Filter by Condition IDs](/websockets/subscribe-condition-ids)
* [Update Subscription](/websockets/update)
* [Unsubscribe](/websockets/unsubscribe)