> ## 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 - Condition ID Filters

> Subscribe to orders filtered by condition IDs

## Overview

Filter orders by specific condition IDs to track trades for particular market conditions. This is useful when you want to monitor specific outcomes or tokens within markets.

## Subscription Format

```json theme={null}
{
    "action": "subscribe",
    "platform": "polymarket",
    "version": 1,
    "type": "orders",
    "filters": {
        "condition_ids": [
            "0x17815081230e3b9c78b098162c33b1ffa68c4ec29c123d3d14989599e0c2e113"
        ]
    }
}
```

## Parameters

* `action`: Must be `"subscribe"`
* `platform`: Must be `"polymarket"`
* `version`: Currently `1`
* `type`: Must be `"orders"`
* `filters.condition_ids`: Array of condition ID strings (hex format starting with `0x`)

## Multiple Condition IDs

You can track multiple conditions in a single subscription:

```json theme={null}
{
    "action": "subscribe",
    "platform": "polymarket",
    "version": 1,
    "type": "orders",
    "filters": {
        "condition_ids": [
            "0x17815081230e3b9c78b098162c33b1ffa68c4ec29c123d3d14989599e0c2e113",
            "0x592b8a416cbe36aa7bb40df85a61685ebd54ebbd2d55842f1bb398cae4f40dfc"
        ]
    }
}
```

You'll receive order events when trades occur for any of the specified condition IDs.

## 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": "0x17815081230e3b9c78b098162c33b1ffa68c4ec29c123d3d14989599e0c2e113",
        "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 `condition_id` field in the response will match one of the condition IDs from your subscription filter.

## Use Cases

* Monitor specific tokens or outcomes within a market
* Track trading activity for particular conditions
* Build analytics dashboards for specific market conditions
* Create alerts for trades on specific conditions

## Related

* [Subscribe Overview](/websockets/subscribe)
* [Filter by Users](/websockets/subscribe-users)
* [Filter by Market Slugs](/websockets/subscribe-market-slugs)
* [Update Subscription](/websockets/update)
* [Unsubscribe](/websockets/unsubscribe)