POST /rpc

POST

https://casper.nownodes.io/rpc

Authorizations

ApiKeyAuthApiKeyAuth

api-key string

NOWNodes API key passed in the api-key header.

Returns the chainspec bytes of the current network, including optional genesis accounts and global state bytes.

Body

application/json

idintegerrequired

JSON-RPC request identifier

jsonrpcstringrequired

JSON-RPC version

methodstringrequired

RPC method name

paramsArray<any>required

Parameters for the method (empty for this RPC)

Response

200OK

Successful response returning the chainspec bytes

POST /rpc

curl -X POST 'https://casper.nownodes.io/rpc' \
  -H 'Content-Type: application/json' \
  -d '{
    "id": 1,
    "jsonrpc": "2.0",
    "method": "info_get_chainspec",
    "params": []
  }'

import { JsonRpcProvider } from "ethers";

const provider = new JsonRpcProvider("https://casper.nownodes.io/rpc");
const result = await provider.send("info_get_chainspec", []);
console.log(result);

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

uri = URI('https://casper.nownodes.io/rpc')
request = Net::HTTP::Post.new(uri)
request['Content-Type'] = 'application/json'
request.body = '{
  "jsonrpc": "2.0",
  "method": "info_get_chainspec",
  "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://casper.nownodes.io/rpc"))
response = w3.provider.make_request("info_get_chainspec", [])
print(response)

import { createPublicClient, http } from "viem";

const client = createPublicClient({
  transport: http("https://casper.nownodes.io/rpc"),
});

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

console.log(result);

const endpoint = "https://casper.nownodes.io/rpc";
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: "info_get_chainspec", params: [], id: 1 });
console.log(result);

const response = await fetch('https://casper.nownodes.io/rpc', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
      "id": 1,
      "jsonrpc": "2.0",
      "method": "info_get_chainspec",
      "params": []
    }),
});

const data = await response.json();

import requests

payload = {
  "id": 1,
  "jsonrpc": "2.0",
  "method": "info_get_chainspec",
  "params": []
}

response = requests.post('https://casper.nownodes.io/rpc', json=payload)
data = response.json()

require 'net/http'
require 'json'

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

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

Request Body

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "info_get_chainspec",
  "params": []
}

200

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": {
    "api_version": "2.0.0",
    "chainspec_bytes": {
      "chainspec_bytes": "5b70726f746f636f6c5d0a232050726f746f636f6c2076657273696f6e2e0a76657273696f6e203d2027322e302e3427...",
      "maybe_genesis_accounts_bytes": null,
      "maybe_global_state_bytes": null
    }
  }
}

Documentation

How to migrate to NOWNodes

Authorizations

Body

Response