web3_clientVersion - Optimism

Example code for the web3_clientVersion json-rpc method. Сomplete guide on how to use web3_clientVersion json-rpc in GetBlock.io Web3 documentation.

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

curl

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"
}'

wss

Response

A successful response returns the following:

{
    "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

Ethers.js

ethers.js

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);

Viem