web3_clientVersion
curl --request POST \
--url https://monad-testnet.core.chainstack.com/9c5b265f20b3ea5df4f54f70eb74b800/ \
--header 'Content-Type: application/json' \
--data '
{
"id": 1,
"jsonrpc": "2.0",
"method": "web3_clientVersion",
"params": []
}
'import requests
url = "https://monad-testnet.core.chainstack.com/9c5b265f20b3ea5df4f54f70eb74b800/"
payload = {
"id": 1,
"jsonrpc": "2.0",
"method": "web3_clientVersion",
"params": []
}
headers = {"Content-Type": "application/json"}
response = requests.post(url, json=payload, headers=headers)
print(response.text)const options = {
method: 'POST',
headers: {'Content-Type': 'application/json'},
body: JSON.stringify({id: 1, jsonrpc: '2.0', method: 'web3_clientVersion', params: []})
};
fetch('https://monad-testnet.core.chainstack.com/9c5b265f20b3ea5df4f54f70eb74b800/', options)
.then(res => res.json())
.then(res => console.log(res))
.catch(err => console.error(err));<?php
$curl = curl_init();
curl_setopt_array($curl, [
CURLOPT_URL => "https://monad-testnet.core.chainstack.com/9c5b265f20b3ea5df4f54f70eb74b800/",
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => "",
CURLOPT_MAXREDIRS => 10,
CURLOPT_TIMEOUT => 30,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_CUSTOMREQUEST => "POST",
CURLOPT_POSTFIELDS => json_encode([
'id' => 1,
'jsonrpc' => '2.0',
'method' => 'web3_clientVersion',
'params' => [
]
]),
CURLOPT_HTTPHEADER => [
"Content-Type: application/json"
],
]);
$response = curl_exec($curl);
$err = curl_error($curl);
curl_close($curl);
if ($err) {
echo "cURL Error #:" . $err;
} else {
echo $response;
}package main
import (
"fmt"
"strings"
"net/http"
"io"
)
func main() {
url := "https://monad-testnet.core.chainstack.com/9c5b265f20b3ea5df4f54f70eb74b800/"
payload := strings.NewReader("{\n \"id\": 1,\n \"jsonrpc\": \"2.0\",\n \"method\": \"web3_clientVersion\",\n \"params\": []\n}")
req, _ := http.NewRequest("POST", url, payload)
req.Header.Add("Content-Type", "application/json")
res, _ := http.DefaultClient.Do(req)
defer res.Body.Close()
body, _ := io.ReadAll(res.Body)
fmt.Println(string(body))
}HttpResponse<String> response = Unirest.post("https://monad-testnet.core.chainstack.com/9c5b265f20b3ea5df4f54f70eb74b800/")
.header("Content-Type", "application/json")
.body("{\n \"id\": 1,\n \"jsonrpc\": \"2.0\",\n \"method\": \"web3_clientVersion\",\n \"params\": []\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://monad-testnet.core.chainstack.com/9c5b265f20b3ea5df4f54f70eb74b800/")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Post.new(url)
request["Content-Type"] = 'application/json'
request.body = "{\n \"id\": 1,\n \"jsonrpc\": \"2.0\",\n \"method\": \"web3_clientVersion\",\n \"params\": []\n}"
response = http.request(request)
puts response.read_body{
"jsonrpc": "<string>",
"id": 123,
"result": "<string>"
}Monad node API
web3_clientVersion | Monad
Monad API method that returns the current client version. This method is useful for identifying the node implementation and version you are connected to.
POST
/
web3_clientVersion
curl --request POST \
--url https://monad-testnet.core.chainstack.com/9c5b265f20b3ea5df4f54f70eb74b800/ \
--header 'Content-Type: application/json' \
--data '
{
"id": 1,
"jsonrpc": "2.0",
"method": "web3_clientVersion",
"params": []
}
'import requests
url = "https://monad-testnet.core.chainstack.com/9c5b265f20b3ea5df4f54f70eb74b800/"
payload = {
"id": 1,
"jsonrpc": "2.0",
"method": "web3_clientVersion",
"params": []
}
headers = {"Content-Type": "application/json"}
response = requests.post(url, json=payload, headers=headers)
print(response.text)const options = {
method: 'POST',
headers: {'Content-Type': 'application/json'},
body: JSON.stringify({id: 1, jsonrpc: '2.0', method: 'web3_clientVersion', params: []})
};
fetch('https://monad-testnet.core.chainstack.com/9c5b265f20b3ea5df4f54f70eb74b800/', options)
.then(res => res.json())
.then(res => console.log(res))
.catch(err => console.error(err));<?php
$curl = curl_init();
curl_setopt_array($curl, [
CURLOPT_URL => "https://monad-testnet.core.chainstack.com/9c5b265f20b3ea5df4f54f70eb74b800/",
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => "",
CURLOPT_MAXREDIRS => 10,
CURLOPT_TIMEOUT => 30,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_CUSTOMREQUEST => "POST",
CURLOPT_POSTFIELDS => json_encode([
'id' => 1,
'jsonrpc' => '2.0',
'method' => 'web3_clientVersion',
'params' => [
]
]),
CURLOPT_HTTPHEADER => [
"Content-Type: application/json"
],
]);
$response = curl_exec($curl);
$err = curl_error($curl);
curl_close($curl);
if ($err) {
echo "cURL Error #:" . $err;
} else {
echo $response;
}package main
import (
"fmt"
"strings"
"net/http"
"io"
)
func main() {
url := "https://monad-testnet.core.chainstack.com/9c5b265f20b3ea5df4f54f70eb74b800/"
payload := strings.NewReader("{\n \"id\": 1,\n \"jsonrpc\": \"2.0\",\n \"method\": \"web3_clientVersion\",\n \"params\": []\n}")
req, _ := http.NewRequest("POST", url, payload)
req.Header.Add("Content-Type", "application/json")
res, _ := http.DefaultClient.Do(req)
defer res.Body.Close()
body, _ := io.ReadAll(res.Body)
fmt.Println(string(body))
}HttpResponse<String> response = Unirest.post("https://monad-testnet.core.chainstack.com/9c5b265f20b3ea5df4f54f70eb74b800/")
.header("Content-Type", "application/json")
.body("{\n \"id\": 1,\n \"jsonrpc\": \"2.0\",\n \"method\": \"web3_clientVersion\",\n \"params\": []\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://monad-testnet.core.chainstack.com/9c5b265f20b3ea5df4f54f70eb74b800/")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Post.new(url)
request["Content-Type"] = 'application/json'
request.body = "{\n \"id\": 1,\n \"jsonrpc\": \"2.0\",\n \"method\": \"web3_clientVersion\",\n \"params\": []\n}"
response = http.request(request)
puts response.read_body{
"jsonrpc": "<string>",
"id": 123,
"result": "<string>"
}Monad API method that returns the current client version. This method is useful for identifying the node implementation and version you are connected to.
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Parameters
none
Response
result— a string representing the current client version.
web3_clientVersion code examples
const { ethers } = require("ethers");
const provider = new ethers.JsonRpcProvider("CHAINSTACK_NODE_URL");
async function getClientVersion() {
const clientVersion = await provider.send("web3_clientVersion", []);
console.log(`Client version: ${clientVersion}`);
}
getClientVersion();
from web3 import Web3
node_url = "CHAINSTACK_NODE_URL"
web3 = Web3(Web3.HTTPProvider(node_url))
client_version = web3.client_version
print(f'Client version: {client_version}')
Use case
A practical use case forweb3_clientVersion is implementing compatibility checks in your application to ensure the connected node supports required features, or logging node information for debugging and monitoring purposes.Last modified on June 22, 2026
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