> For the complete documentation index, see [llms.txt](https://docs.getblock.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.getblock.io/api-reference/solana-sol/getmaxshredinsertslot-solana.md).

# getMaxShredInsertSlot - Solana

Example code for the getMaxShredInsertSlot JSON-RPC method. Complete guide on how to use the getMaxShredInsertSlot JSON-RPC method in the GetBlock Web3 documentation.

This method returns the highest slot for which the node has written shreds into its blockstore. It advances after the retransmit stage completes for a slot.

## Parameters

This method does not accept any parameters.

## Request

{% tabs %}
{% tab title="cURL" %}
{% code overflow="wrap" %}

```bash
curl --location --request POST 'https://shared.eu-central-1.getblock.io/<ACCESS-TOKEN>/' \
--header 'Content-Type: application/json' \
--data-raw '{
    "jsonrpc": "2.0",
    "method": "getMaxShredInsertSlot",
    "params": [],
    "id": "getblock.io"
}'
```

{% endcode %}
{% endtab %}

{% tab title="@solana/web3.js" %}
{% code title="example.js" %}

```javascript
const { Connection } = require('@solana/web3.js');

const connection = new Connection('https://shared.eu-central-1.getblock.io/<ACCESS-TOKEN>/', 'confirmed');

const { result } = await connection._rpcRequest('getMaxShredInsertSlot', []);

console.log(result);
```

{% endcode %}
{% endtab %}

{% tab title="Request" %}
{% code title="example.py" %}

```python
import requests

response = requests.post(
    'https://shared.eu-central-1.getblock.io/<ACCESS-TOKEN>/',
    headers={'Content-Type': 'application/json'},
    json={
        'jsonrpc': '2.0',
        'method': 'getMaxShredInsertSlot',
        'params': [],
        'id': 'getblock.io'
    }
)

print(response.json()['result'])
```

{% endcode %}
{% endtab %}

{% tab title="Rust" %}
{% code title="example.rs" %}

```rust
use reqwest::Client;
use serde_json::{json, Value};

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let client = Client::new();

    let response = client
        .post("https://shared.eu-central-1.getblock.io/<ACCESS-TOKEN>/")
        .header("Content-Type", "application/json")
        .json(&json!({
            "jsonrpc": "2.0",
            "method": "getMaxShredInsertSlot",
            "params": [],
            "id": "getblock.io"
        }))
        .send()
        .await?
        .json::<Value>()
        .await?;

    println!("Result: {}", response["result"]);
    Ok(())
}
```

{% endcode %}
{% endtab %}
{% endtabs %}

## Response

```json
{
    "jsonrpc": "2.0",
    "id": "getblock.io",
    "result": 397234561
}
```

## Response Parameters

| Parameter | Type   | Description                                                  |
| --------- | ------ | ------------------------------------------------------------ |
| jsonrpc   | string | JSON-RPC protocol version ("2.0")                            |
| id        | string | Request identifier matching the request                      |
| result    | number | Highest slot with shreds inserted into the node's blockstore |

## Use Cases

* **Write Path Health**: Detect blockstore write stalls separately from network ingestion
* **Disk Diagnostics**: Correlate insert lag with storage throughput problems
* **Indexer Readiness**: Confirm a slot is durably stored before requesting getBlock
* **Node Comparison**: Benchmark ingestion pipelines across hardware configurations

## Error Handling

| Error Code | Message           | Description                                     |
| ---------- | ----------------- | ----------------------------------------------- |
| -32603     | Internal error    | Node failed to read the requested cluster state |
| -32005     | Node is unhealthy | The node has fallen behind the cluster tip      |