> For the complete documentation index, see [llms.txt](https://docs.triton.one/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.triton.one/solana/rpc-methods/historical-data/getfirstavailableblock.md).

# getFirstAvailableBlock

Returns the slot of the lowest confirmed block still available to query.

## Request

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

```bash
curl "https://<your-endpoint>.mainnet.rpcpool.com/<your-token>" -s -X POST \
  -H "Content-Type: application/json" \
  -d '{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "getFirstAvailableBlock"
}'
```

{% endtab %}

{% tab title="Kit" %}

```typescript
import { createSolanaRpc } from "@solana/kit";

const rpc_url = "https://<your-endpoint>.mainnet.rpcpool.com/<your-token>";
const rpc = createSolanaRpc(rpc_url);

let firstAvailableBlock = await rpc.getFirstAvailableBlock().send();

console.log(firstAvailableBlock);
```

{% endtab %}

{% tab title="web3.js" %}

```typescript
import { Connection } from "@solana/web3.js";

const connection = new Connection("https://<your-endpoint>.mainnet.rpcpool.com/<your-token>", "confirmed");

let firstAvailableBlock = await connection.getFirstAvailableBlock();

console.log(firstAvailableBlock);
```

{% endtab %}

{% tab title="Rust" %}

```rust
// Cargo.toml: anyhow = "1", solana-client = "~4.4", solana-commitment-config = "3",
// tokio = { version = "1", features = ["full"] }.
// Requires Rust 1.98.1 or newer (solana-client 4.4).
use anyhow::Result;
use solana_client::nonblocking::rpc_client::RpcClient;
use solana_commitment_config::CommitmentConfig;

#[tokio::main]
async fn main() -> Result<()> {
    let client = RpcClient::new_with_commitment(
        String::from("https://<your-endpoint>.mainnet.rpcpool.com/<your-token>"),
        CommitmentConfig::confirmed(),
    );

    let first_available_block = client.get_first_available_block().await?;

    println!("{:#?}", first_available_block);

    Ok(())
}
```

{% endtab %}
{% endtabs %}

## Response

```json
{
  "jsonrpc": "2.0",
  "result": 250000,
  "id": 1
}
```

## Result

The slot (`u64`) of the lowest confirmed block that is still available.

***

*Adapted from the* [*Solana `getFirstAvailableBlock` reference*](https://solana.com/docs/rpc/http/getfirstavailableblock)*, maintained by the Solana Foundation.*

***

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