> For the complete documentation index, see [llms.txt](https://docs.validationcloud.io/v1/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.validationcloud.io/v1/solana/websocket-unstable-methods/slotsupdatessubscribe.md).

# slotsUpdatesSubscribe

Subscribe to receive a notification anytime a new block is Confirmed or Finalized.

This method will use `20` [Compute Units](/v1/about/billing.md).

***

## **Parameters**

None.

## Returns

`result` integer The subscription id (needed to unsubscribe).

`slotsUpdatesNotification` object. The notification object with the following fields:

* `parent` integer The parent slot.
* `slot` integer The newly updated slot.
* `timestamp` integer The Unix timestamp of the update.
* `type` string The update type, which may be one of the following: 'firstShredReceived', 'completed', 'createdBank', 'frozen', 'dead', 'optimisticConfirmation' or 'root'.

```bash
// Result
{ "jsonrpc": "2.0", "result": 0, "id": 1 }
```

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

<pre class="language-bash"><code class="lang-bash"><strong>wscat -c wss://mainnet.solana.validationcloud.io/v1/&#x3C;YOUR_API_KEY_HERE>
</strong># wait for connection
{"id":1,"jsonrpc":"2.0","method":"slotsUpdatesSubscribe"}
    
</code></pre>

{% endtab %}

{% tab title="devnet" %}

```bash
wscat -c wss://devnet.solana.validationcloud.io/v1/<YOUR_API_KEY_HERE>
# wait for connection
{"id":1,"jsonrpc":"2.0","method":"slotsUpdatesSubscribe"}
    
```

{% endtab %}
{% endtabs %}