> For the complete documentation index, see [llms.txt](https://faq.finerymarkets.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://faq.finerymarkets.com/api-reference/websocket-api/feed-md-view-only-firm-market-data.md).

# Feed 'MD' - View-only Firm Market data

**Requests**

{% tabs %}
{% tab title="Subscribe" %}
**Subscribe to all LPs:**

```json
{"event": "bind", "feed": "MD", "feedId": {"instrument": "BTC-USD"}}
```

**Subscribe to selected LPs:**

```json
{"event": "bind", "feed": "MD", "feedId": {"instrument": "BTC-USD", "makers": [1, 2, 3]}}
```

**For masters: subscribe on behalf of a subtaker:** 

```json
{"event": "bind", "feed": "MD", "feedId": {"clientId": 123, "instrument": "BTC-USD"}}
```

```json
{"event": "bind", "feed": "MD", "feedId": {"clientId": 123, "instrument": "BTC-USD", "makers": [1, 2, 3]}}
```

{% endtab %}

{% tab title="Unsubscribe" %}
**Unsubscribe:**

```json
{"event": "unbind", "feed": "MD", "feedId": {"instrument": "BTC-USD"}}
```

```json
{"event": "unbind", "feed": "MD", "feedId": {"instrument": "BTC-USD", "makers": [1, 2, 3]}}
```

```json
{"event": "unbind", "feed": "MD", "feedId": {"clientId": 123, "instrument": "BTC-USD"}}
```

```json
{"event": "unbind", "feed": "MD", "feedId": {"clientId": 123, "instrument": "BTC-USD", "makers": [1, 2, 3]}}
```

{% endtab %}
{% endtabs %}

**Feed handling is the same as for Feed 'B'**

{% content-ref url="/pages/jlYES7NUcE8sC1E7qo73" %}
[Feed 'B' - Global order book](/api-reference/websocket-api/feed-b-global-order-book.md)
{% endcontent-ref %}