# Subscribing & Unsubscribing

Once connected and authenticated to the sFOX WebSocket API you can subscribe to various feeds by using the subscribe or unsubscribe command. 

These commands should be JSON with the following properties:

<table><thead><tr><th width="162.1215494565709">Property</th><th width="118.24758455477465">Type</th><th>Command</th></tr></thead><tbody><tr><td><code>type</code></td><td>string</td><td>Command you are sending to the websocket (<code>subscribe</code> or <code>unsubscribe</code>)</td></tr><tr><td><code>feeds</code></td><td>string[]</td><td>List of the feeds that should be subscribed/unsubscribed to</td></tr></tbody></table>

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

```javascript
const subscribeMsg = {
  type: 'subscribe',
  feeds: ['ticker.sfox.btcusd']
}
ws.send(JSON.stringify(subscribeMsg));

...

const unsubscribeMsg = {
  type: 'unsubscribe',
  feeds: ['ticker.sfox.btcusd']
}
ws.send(JSON.stringify(unsubscribeMsg))
```

{% endtab %}

{% tab title="Python" %}

```python
subscribe_msg = {
    "type": "subscribe",
    "feeds": ["ticker.sfox.btcusd"],
}

await ws.send(json.dumps(subscribe_msg))

...


unsubscribe_msg = {
    "type": "unsubscribe",
    "feeds": ["ticker.sfox.btcusd"],
}

await ws.send(json.dumps(unsubscribe_msg))
```

{% 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/websocket-feeds-2.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.