# web3\_clientVersion - Optimism

This method returns a string identifying the current client implementation and version. For Optimism, this will typically include information about the op-geth client being used. This is useful for debugging, compatibility checking, and infrastructure monitoring.

### Parameters

* None

### Request Sample

{% tabs %}
{% tab 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"
}'
```

{% endtab %}

{% tab title="wss" %}

```bash
wscat -c wss://go.getblock.io/<ACCESS-TOKEN>/

# wait for connection and send the request body 
{"jsonrpc": "2.0", "method": "web3_clientVersion", "params": [], "id": "getblock.io"}
```

{% endtab %}
{% endtabs %}

### Response

A successful response returns the following:

```json
{
    "jsonrpc": "2.0",
    "id": "getblock.io",
    "result": "Geth/v1.101702.0-rc.1-3de88058-20260407/linux-amd64/go1.24.13"
}
```

### Response Parameters

* **`id`**: A unique request identifier, matching the `id` sent in the request body.
* **`jsonrpc`**: Specifies the use of JSON-RPC version 2.0.
* **`result`**: A string containing the client name, version, platform, and runtime information.

### Use Case

The web3\_clientVersion method is commonly used for:

* **Client identification**
* **Version compatibility checking**
* **Debugging**
* **Infrastructure documentation**

## Error Handling

| Error Code | Description    |
| ---------- | -------------- |
| -32603     | Internal error |

## Web3  Integration

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

```javascript
const { ethers } = require('ethers');

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

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

{% endcode %}
{% endtab %}

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

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

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

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

{% 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/optimism-op/optimism_web3_clientversion.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.