Get Ethereum network fork information

POST

https://eth-archive.nownodes.io/

Authorizations

ApiKeyAuthApiKeyAuth

api-key string

NOWNodes API key passed in the api-key header.

The erigon_forks method returns information about Ethereum network forks.

This Erigon-specific method provides details about hard forks including:

Genesis block hash
Block numbers where height-based forks occurred
Timestamps where time-based forks occurred

This is useful for understanding the Ethereum network upgrade history and for applications that need to handle different fork behaviors.

Body

application/json

The erigon_forks method returns information about Ethereum network forks.

This Erigon-specific method provides details about hard forks including:

Genesis block hash
Block numbers where height-based forks occurred
Timestamps where time-based forks occurred

This is useful for understanding the Ethereum network upgrade history and for applications that need to handle different fork behaviors.

Request payload for Get Ethereum network fork information.

jsonrpcstring2.0required

JSON-RPC version identifier

methodstringerigon_forksrequired

The method to be invoked

idinteger | stringrequired

Request identifier for matching responses

paramsArray<any>required

Empty parameters array

Response

200OK

Successful forks information response

400Bad Request

Invalid request parameters

401Unauthorized

Unauthorized: API key is present but rejected by the NOWNodes gateway.

405Method Not Allowed

Method Not Allowed. Returned by the NOWNodes gateway for malformed or unsupported gateway-level requests.

422Unprocessable Entity

Missing API key. The NOWNodes gateway returns plain text for this error.

500Internal Server Error

Internal server error

Get Ethereum network fork information

curl -X POST 'https://eth-archive.nownodes.io/' \
  -H 'Content-Type: application/json' \
  -d '{
    "jsonrpc": "2.0",
    "method": "erigon_forks",
    "id": 5,
    "params": []
  }'

import { JsonRpcProvider } from "ethers";

const provider = new JsonRpcProvider("https://eth-archive.nownodes.io/");
const result = await provider.send("erigon_forks", []);
console.log(result);

require 'eth'
require 'json'
require 'net/http'

uri = URI('https://eth-archive.nownodes.io/')
request = Net::HTTP::Post.new(uri)
request['Content-Type'] = 'application/json'
request.body = '{
  "jsonrpc": "2.0",
  "method": "erigon_forks",
  "params": [],
  "id": 1
}'

response = Net::HTTP.start(uri.hostname, uri.port, use_ssl: true) do |http|
  http.request(request)
end

puts JSON.parse(response.body)

from web3 import Web3

w3 = Web3(Web3.HTTPProvider("https://eth-archive.nownodes.io/"))
response = w3.provider.make_request("erigon_forks", [])
print(response)

import { createPublicClient, http } from "viem";

const client = createPublicClient({
  transport: http("https://eth-archive.nownodes.io/"),
});

const result = await client.request({
  method: "erigon_forks",
  params: [],
});

console.log(result);

const endpoint = "https://eth-archive.nownodes.io/";
const apiKey = "YOUR_API_KEY";

async function nownodesRequest(payload) {
  const response = await fetch(endpoint, {
    method: "POST",
    headers: {
      "Content-Type": "application/json",
      "api-key": apiKey,
    },
    body: JSON.stringify(payload),
  });

  return response.json();
}

const result = await nownodesRequest({ jsonrpc: "2.0", method: "erigon_forks", params: [], id: 1 });
console.log(result);

const response = await fetch('https://eth-archive.nownodes.io/', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
      "jsonrpc": "2.0",
      "method": "erigon_forks",
      "id": 5,
      "params": []
    }),
});

const data = await response.json();

import requests

payload = {
  "jsonrpc": "2.0",
  "method": "erigon_forks",
  "id": 5,
  "params": []
}

response = requests.post('https://eth-archive.nownodes.io/', json=payload)
data = response.json()

require 'net/http'
require 'json'

uri = URI('https://eth-archive.nownodes.io/')
request = Net::HTTP::Post.new(uri)
request['Content-Type'] = 'application/json'
request.body = '{
    "jsonrpc": "2.0",
    "method": "erigon_forks",
    "id": 5,
    "params": []
  }'

response = Net::HTTP.start(uri.hostname, uri.port, use_ssl: true) { |http| http.request(request) }
data = JSON.parse(response.body)

Request Body

{
  "jsonrpc": "2.0",
  "method": "erigon_forks",
  "id": 5,
  "params": []
}

{
  "jsonrpc": "2.0",
  "id": 1,
  "error": {
    "code": -32601,
    "message": "Method not found"
  }
}

{
  "jsonrpc": "2.0",
  "id": 5,
  "error": {
    "code": -32602,
    "message": "Invalid parameters",
    "data": "Method not expecting parameters"
  }
}

Unknown API_key

Method Not Allowed

Missing API_key

{
  "jsonrpc": "2.0",
  "id": 5,
  "error": {
    "code": -32000,
    "message": "Execution error",
    "data": "Method not supported"
  }
}

Documentation

How to migrate to NOWNodes

Get Ethereum network fork information

Authorizations

Body

Response