# web3\_clientVersion - Mantle

This method returns the current client version of the Mantle node.

### Parameters

* None

### Request

{% tabs %}
{% tab title="curl" %}
{% code title="curl" %}

```bash
curl --location --request POST 'https://go.getblock.io/<ACCESS-TOKEN>/' \
--header 'Content-Type: application/json' \
--data-raw '{
    "jsonrpc": "2.0",
    "method": "web3_clientVersion",
    "params": [],
    "id": "getblock.io"
}'
```

{% endcode %}
{% endtab %}

{% tab title="JavaScript (axios)" %}
{% code title="web3\_clientVersion.js" %}

```javascript
import axios from 'axios';

const data = JSON.stringify({
    "jsonrpc": "2.0",
    "method": "web3_clientVersion",
    "params": [],
    "id": "getblock.io"
});

const config = {
    method: 'post',
    url: 'https://go.getblock.io/<ACCESS-TOKEN>/',
    headers: {
        'Content-Type': 'application/json'
    },
    data: data
};

axios(config)
    .then(response => console.log(JSON.stringify(response.data)))
    .catch(error => console.log(error));
```

{% endcode %}
{% endtab %}

{% tab title="Python (requests)" %}
{% code title="web3\_clientVersion.py" %}

```python
import requests
import json

url = "https://go.getblock.io/<ACCESS-TOKEN>/"

payload = json.dumps({
    "jsonrpc": "2.0",
    "method": "web3_clientVersion",
    "params": [],
    "id": "getblock.io"
})

headers = {
    'Content-Type': 'application/json'
}

response = requests.post(url, headers=headers, data=payload)
print(response.text)
```

{% endcode %}
{% endtab %}

{% tab title="Rust (reqwest)" %}
{% code title="web3\_clientVersion.rs" %}

```rust
use reqwest::header;

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let client = reqwest::Client::new();
    
    let response = client
        .post("https://go.getblock.io/<ACCESS-TOKEN>/")
        .header(header::CONTENT_TYPE, "application/json")
        .body(r#"{
            "jsonrpc": "2.0",
            "method": "web3_clientVersion",
            "params": [],
            "id": "getblock.io"
        }"#)
        .send()
        .await?;
    
    println!("{}", response.text().await?);
    Ok(())
}
```

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

### Response

```json
{
    "jsonrpc": "2.0",
    "id": "getblock.io",
    "result": "Geth/v1.9.10-stable/linux-amd64/go1.19"
}
```

### Response Parameters

| Field   | Type   | Description                             |
| ------- | ------ | --------------------------------------- |
| jsonrpc | string | JSON-RPC protocol version ("2.0")       |
| id      | string | Request identifier matching the request |
| result  | string | Client version string                   |

### Use Case

The `web3_clientVersion` method is essential for:

* Node version verification
* Compatibility checking
* Debugging node issues
* Infrastructure monitoring
* Feature availability detection
* Client implementation identification

### Error Handling

| Status Code | Error Message | Cause                           |
| ----------- | ------------- | ------------------------------- |
| 403         | Forbidden     | Missing or invalid ACCESS-TOKEN |

### Web3 Integration

{% tabs %}
{% tab title="Ethers.js" %}
{% code title="ethers.js" %}

```javascript
import { ethers } from 'ethers';

const provider = new ethers.JsonRpcProvider('https://go.getblock.io/<ACCESS-TOKEN>/');

const clientVersion = await provider.send('web3_clientVersion', []);
console.log('Client version:', clientVersion);
```

{% endcode %}
{% endtab %}

{% tab title="Viem" %}
{% code title="viem" %}

```javascript
import { createPublicClient, http } from 'viem';
import { mantle } from 'viem/chains';

const client = createPublicClient({
    chain: mantle,
    transport: http('https://go.getblock.io/<ACCESS-TOKEN>/')
});

const clientVersion = await client.request({
    method: 'web3_clientVersion',
    params: []
});
console.log('Client version:', clientVersion);
```

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


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.getblock.io/api-reference/mantle-mnt/web3_clientversion-mantle.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.