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POST
net_version
curl --request POST \
  --url https://tempo-mainnet.core.chainstack.com/c3ce2925b51f1ed18719fe8a23bbdccf/ \
  --header 'Content-Type: application/json' \
  --data '
{
  "jsonrpc": "2.0",
  "method": "net_version",
  "params": [],
  "id": 1
}
'
{
  "jsonrpc": "<string>",
  "id": 123,
  "result": "<string>"
}
Tempo API method that returns the current network ID. The Tempo mainnet network ID is 4217. The Moderato testnet network ID is 42431.
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​
Parameters

  • none

​
Response

  • result — the network ID as a string (4217 for Tempo mainnet, 42431 for Moderato testnet)

​
net_version code examples

const Web3 = require("web3");
const NODE_URL = "CHAINSTACK_NODE_URL";
const web3 = new Web3(NODE_URL);

async function getNetworkId() {
  const networkId = await web3.eth.net.getId();
  console.log(`Network ID: ${networkId}`);
}

getNetworkId()

Body

application/json
​
jsonrpc
string
default:2.0
​
method
string
default:net_version
​
params
any[]
​
id
integer
default:1

Response

200 - application/json

The network ID

​
jsonrpc
string
​
id
integer
​
result
string

The network ID (42431 for Tempo Moderato testnet)

Last modified on May 18, 2026