# programSubscribe

(Subscription Websocket) Subscribe to a program to receive notifications when the lamports or data for a given account owned by the program changes.

This method will use `20` [Compute Units](https://docs.validationcloud.io/v1/about/billing).

***

## **Parameters**

* `program_id` string. The Pubkey encoded base-58 string.
* `object` *optional.* Configuration object containing the following fields:
  * `commitment` string. The level of commitment required for the query. The options include:
    * `finalized` string. The node will query the most recent block confirmed by the supermajority of the cluster as having reached maximum lockout, meaning the cluster has recognized this block as finalized.
    * `confirmed` string. The node will query the most recent block that has been voted on by the supermajority of the cluster.
    * `processed` string. The node will query its most recent block. Note that the block may not be complete.
* `encoding` string. The encoding format for account data. It can be one of base58 (slow), base64, base64+zstd or jsonParsed.
* `filters` string. The filter results using various filter objects; The account must meet all filter criteria to be included in results.

## Returns

`result` The result will be an RpcResponse JSON object with id equal to the subscription id (needed to unsubscribe).

`Notification Format:` The notification format is the same as seen in the getProgramAccounts RPC HTTP method.

```bash
// Result
{ "jsonrpc": "2.0", "result": 24040, "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
{"jsonrpc": "2.0", "id": 1,"method": "programSubscribe","params": ["11111111111111111111111111111111", {"encoding": "base64", "commitment": "finalized"}]}
    
</code></pre>

{% endtab %}

{% tab title="devnet" %}

```bash
wscat -c wss://devnet.solana.validationcloud.io/v1/<YOUR_API_KEY_HERE>
# wait for connection
{"jsonrpc": "2.0", "id": 1,"method": "programSubscribe","params": ["11111111111111111111111111111111", {"encoding": "base64", "commitment": "finalized"}]}
    
```

{% endtab %}
{% endtabs %}