Get block header by height

POST

https://xmr.nownodes.io/json_rpc

Authorizations

ApiKeyAuthApiKeyAuth

api-key string

NOWNodes API key passed in the api-key header.

Retrieve block header information using the block's height.

Body

application/json

jsonrpcstring

idstring

methodstring

paramsobject

Show child attributes

heightinteger

The block's height

fill_pow_hashboolean

Add PoW hash to block_header response (optional, defaults to false)

Response

200OK

Block header information

400Bad Request

Bad Request - missing or invalid parameters

403Forbidden

Forbidden

404Not Found

Not Found

500Internal Server Error

Internal server error

Get block header by height

curl -X POST 'https://xmr.nownodes.io/json_rpc' \
  -H 'Content-Type: application/json' \
  -d '{
    "jsonrpc": "2.0",
    "id": "0",
    "method": "get_block_header_by_height",
    "params": {
      "height": 0,
      "fill_pow_hash": true
    }
  }'

import { JsonRpcProvider } from "ethers";

const provider = new JsonRpcProvider("https://xmr.nownodes.io/json_rpc");
const result = await provider.send("get_block_header_by_height", {
  "height": 0,
  "fill_pow_hash": true
});
console.log(result);

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

uri = URI('https://xmr.nownodes.io/json_rpc')
request = Net::HTTP::Post.new(uri)
request['Content-Type'] = 'application/json'
request.body = '{
  "jsonrpc": "2.0",
  "method": "get_block_header_by_height",
  "params": {
    "height": 0,
    "fill_pow_hash": true
  },
  "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://xmr.nownodes.io/json_rpc"))
response = w3.provider.make_request("get_block_header_by_height", {
  "height": 0,
  "fill_pow_hash": True
})
print(response)

import { createPublicClient, http } from "viem";

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

const result = await client.request({
  method: "get_block_header_by_height",
  params: {
  "height": 0,
  "fill_pow_hash": true
},
});

console.log(result);

const endpoint = "https://xmr.nownodes.io/json_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: "get_block_header_by_height", params: {
  "height": 0,
  "fill_pow_hash": true
}, id: 1 });
console.log(result);

const response = await fetch('https://xmr.nownodes.io/json_rpc', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
      "jsonrpc": "2.0",
      "id": "0",
      "method": "get_block_header_by_height",
      "params": {
        "height": 0,
        "fill_pow_hash": true
      }
    }),
});

const data = await response.json();

import requests

payload = {
  "jsonrpc": "2.0",
  "id": "0",
  "method": "get_block_header_by_height",
  "params": {
    "height": 0,
    "fill_pow_hash": True
  }
}

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

require 'net/http'
require 'json'

uri = URI('https://xmr.nownodes.io/json_rpc')
request = Net::HTTP::Post.new(uri)
request['Content-Type'] = 'application/json'
request.body = '{
    "jsonrpc": "2.0",
    "id": "0",
    "method": "get_block_header_by_height",
    "params": {
      "height": 0,
      "fill_pow_hash": true
    }
  }'

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",
  "id": "0",
  "method": "get_block_header_by_height",
  "params": {
    "height": 0,
    "fill_pow_hash": true
  }
}

{
  "id": "0",
  "jsonrpc": "2.0",
  "result": {
    "block_header": {
      "block_size": 210,
      "block_weight": 210,
      "cumulative_difficulty": 754734824984346,
      "cumulative_difficulty_top64": 0,
      "depth": 1374118,
      "difficulty": 815625611,
      "difficulty_top64": 0,
      "hash": "e22cf75f39ae720e8b71b3d120a5ac03f0db50bba6379e2850975b4859190bc6",
      "height": 912345,
      "long_term_weight": 210,
      "major_version": 1,
      "miner_tx_hash": "c7da3965f25c19b8eb7dd8db48dcd4e7c885e2491db77e289f0609bf8e08ec30",
      "minor_version": 2,
      "nonce": 1646,
      "num_txes": 0,
      "orphan_status": false,
      "pow_hash": "",
      "prev_hash": "b61c58b2e0be53fad5ef9d9731a55e8a81d972b8d90ed07c04fd37ca6403ff78",
      "reward": 7388968946286,
      "timestamp": 1452793716,
      "wide_cumulative_difficulty": "0x2ae6d65248f1a",
      "wide_difficulty": "0x309d758b"
    },
    "credits": 0,
    "status": "OK",
    "top_hash": "",
    "untrusted": false
  }
}

{
  "error": "Invalid request parameters"
}

Insufficient permissions

{
  "error": "Block not found"
}

{
  "error": "Internal server error"
}

Documentation

How to migrate to NOWNodes

Get block header by height

Authorizations

Body

Response