# Order Book

### Subscription Instructions

<table><thead><tr><th width="443.5577654976056">Subscription Format</th><th>Example</th></tr></thead><tbody><tr><td><code>orderbook.net.&#x3C;basequote></code></td><td><code>orderbook.net.btcusd</code></td></tr></tbody></table>

### Payload Details

{% hint style="info" %}
Order book subscriptions receive full order book snapshots for the pair. sFOX does not support sending changes at this time.
{% endhint %}

<table><thead><tr><th width="206">Key</th><th>Description</th></tr></thead><tbody><tr><td><code>bids</code></td><td>An array of the bids available in this order book. Each bid is a price, quantity, and liquidity source</td></tr><tr><td><code>asks</code></td><td>An array of the asks available in this order book. Each ask is a price, quantity, and liquidity source</td></tr><tr><td><code>market making</code></td><td>The best bids and offers of the available destinations for maker orders placed on this pair</td></tr><tr><td><code>pair</code></td><td>The currency pair of this order book</td></tr><tr><td><code>lastupdated</code></td><td>The UNIX timestamp this order book was last updated</td></tr><tr><td><code>lastpublished</code></td><td>The UNIX timestamp this order book was last published</td></tr></tbody></table>

### Example Code & Order Book Message

{% tabs %}
{% tab title="NodeJS" %}

```javascript
const WebSocket = require('ws')

const ws = new WebSocket('wss://ws.sfox.com/ws')

ws.on('open', function() {
  const authMessage = {
   type: 'authenticate',
   apiKey: '<ENTERPRISE_API_KEY>',
   enterprise: 'true'
  }
  
  ws.send(JSON.stringify(authMessage))
})

// After successful authentication, subscribe to order book feed
const subscribeMsg = {
  type: 'subscribe',
  feeds: ['orderbook.net.btcusd', 'orderbook.net.ethusd']
}

ws.send(JSON.stringify(subscribeMsg))
```

{% endtab %}

{% tab title="Python" %}
{% code overflow="wrap" %}

```python
import asyncio
import json
import websockets

async def main(uri):
    async with websockets.connect(uri) as ws:
        await ws.send(json.dumps({
            "type": "authenticate",
            "apiKey": "<ENTERPRISE_API_KEY>",
            "enterprise": "true"
        }))

        # After successful authentication message, subscribe to the order book feed
        await ws.send(json.dumps({
            "type": "subscribe",
            "feeds": ["orderbook.net.btcusd"]
        }))
        async for msg in ws:
            print(msg)


asyncio.run(main("wss://ws.sfox.com/ws"))
```

{% endcode %}
{% endtab %}

{% tab title="Example Message" %}

<pre class="language-json"><code class="lang-json"><strong>{
</strong>  "sequence": 18,
  "recipient": "orderbook.net.btcusd",
  "timestamp": 1649900198079450163,
  "payload": {
    "bids": [
      [41368.2, 0.3, "market1"],
      [41367.742812, 0.001963, "otc1"],
      [41367.292857, 0.006878, "market2"],
      [41365.91428571, 0.7, "otc2"],
      [41362.1, 2, "market3"],
      [41361.453441, 0.014505, "otc3"]
    ],
    "asks": [
      [41364.5, 0.5, "otc1"],
      [41367.9, 0.5, "market1"],
      [41371.325, 4, "otc2"],
      [41373.322712, 0.03838193, "market2"],
      [41373.332716, 0.01, "otc3"]
    ],
    "market_making": {
      "bids": [
        [41345.224109, 1.27, "market1"],
        [41361.46, 0.39449605, "otc3"],
        [41366.05, 0.0023, "market2"],
        [41371.88, 0.001963, "otc2"],
        [41374, 0.69001372, "market4"],
        [41374.4, 0.00331432, "otc4"]
      ],
      "asks": [
        [41381.49, 0.12087124, "market5"],
        [41375.29, 0.01103, "market7"],
        [41374.5, 2.0260228, "otc3"],
        [41368.5, 0.01005354, "market1"],
        [41352.644322, 0.03838193, "market2"]
      ]
    },
    "pair": "btcusd",
    "lastupdated": 1649900198016,
    "lastpublished": 1649900198017
  }
}
</code></pre>

{% endtab %}
{% endtabs %}


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.sfox.com/connect/websocket-api/market-data/users.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.