> ## Documentation Index
> Fetch the complete documentation index at: https://docs.validationcloud.io/llms.txt
> Use this file to discover all available pages before exploring further.

# slotsUpdatesSubscribe

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

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

***

## **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'.

```json theme={"theme":{"light":"github-light","dark":"github-dark-default"}}
// Result
{ "jsonrpc": "2.0", "result": 0, "id": 1 }
```

<CodeGroup>
  ```bash title="mainnet" theme={"theme":{"light":"github-light","dark":"github-dark-default"}}
  wscat -c wss://mainnet.solana.validationcloud.io/v1/<YOUR_API_KEY_HERE>
  # wait for connection
  {"id":1,"jsonrpc":"2.0","method":"slotsUpdatesSubscribe"}
      
  ```

  ```bash title="devnet" theme={"theme":{"light":"github-light","dark":"github-dark-default"}}
  wscat -c wss://devnet.solana.validationcloud.io/v1/<YOUR_API_KEY_HERE>
  # wait for connection
  {"id":1,"jsonrpc":"2.0","method":"slotsUpdatesSubscribe"}
      
  ```
</CodeGroup>


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