# Requirements

In order to subscribe to streams, you must [register an account](/getting-started/register-an-account.md) on the bloXroute website and use a paid tier. Streams are available to all paying users that access the BDN with a Gateway or Cloud-API.

Note that Cloud-API streaming functions the same as Gateway streaming. The only difference is that the Cloud-API streaming can be used without a Gateway (and thus without a node). These messages are sent as JSON-RPC notifications over a websocket connection. In case you are using Gateway feed you need to enable the Gateway websocket RPC. The websocket RPC is off by default.\
\
**Start the Gateway with the following additional arguments:**

{% tabs %}
{% tab title="Go Gateway" %}

```bash
--ws 
--ws-host <IP address of client application> 
--ws-port 28333

```

{% endtab %}
{% endtabs %}

For more information, see [Startup Arguments](broken://pages/-MlNxudohX6lybndPN4n).


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