> ## 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.

# getBlocks

Returns a list of confirmed blocks between two slots.

This method will use `30` [Compute Units](/nodeapi/about/billing).

***

## **Parameters**

* `start_slot` string *<span style={{color: "red"}}>Required</span>*. The start slot encoded as an u64 integer.
* `end_slot` string. The end slot encoded as an u64 integer.
* `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.

## Returns

* `result` An array of u64 integers listing confirmed blocks between the start\_slot and either end\_slot - if provided, or latest confirmed block, inclusive. The maximum range allowed is 500,000 slots.

```json theme={"theme":{"light":"github-light","dark":"github-dark-default"}}
// Result
{
	"jsonrpc": "2.0",
	"result": [
		319941846,
		319941847,
		319941848,
		319941849,
		319941850,
		319941851
	],
	"id": 1
}
```

<CodeGroup>
  ```bash title="mainnet" theme={"theme":{"light":"github-light","dark":"github-dark-default"}}
  curl https://mainnet.solana.validationcloud.io/v1/<YOUR_API_KEY_HERE> \
      -X POST \
      -H "Content-Type: application/json" \
      -d '{"jsonrpc": "2.0","id": 1,"method": "getBlocks","params": [319941846,319941851]}'
  ```

  ```bash title="devnet" theme={"theme":{"light":"github-light","dark":"github-dark-default"}}
  curl https://devnet.solana.validationcloud.io/v1/<YOUR_API_KEY_HERE> \
      -X POST \
      -H "Content-Type: application/json" \
      -d '{"jsonrpc": "2.0","id": 1,"method": "getBlocks","params": [319941846,319941851]}'
  ```
</CodeGroup>


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