Get block header by ID

GET

https://ksm-playbook.nownodes.io/v1/blocks/{blockId}/header

Authorizations

ApiKeyAuthApiKeyAuth

api-key string

NOWNodes API key passed in the api-key header.

Returns the header of the specified block (lightweight, no extrinsics/events).

Parameters

blockIdstringrequiredpath

Block height number or block hash

useRcBlockbooleanquery

Treat blockId as Relay Chain block and return Asset Hub blocks

Response

200OK

Block header information

400Bad Request

Invalid block identifier

500Internal Server Error

Internal server error

503Service Unavailable

Service unavailable

Get block header by ID

curl -X GET 'https://ksm-playbook.nownodes.io/v1/blocks/{blockId}/header'

const response = await fetch('https://ksm-playbook.nownodes.io/v1/blocks/{blockId}/header', {
  method: 'GET',
});

const data = await response.json();

require 'net/http'
require 'json'

uri = URI('https://ksm-playbook.nownodes.io/v1/blocks/{blockId}/header')
request = Net::HTTP::Get.new(uri)

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

import requests

response = requests.get('https://ksm-playbook.nownodes.io/v1/blocks/{blockId}/header')
data = response.json()

const response = await fetch('https://ksm-playbook.nownodes.io/v1/blocks/{blockId}/header', {
  method: 'GET',
});

const data = await response.json();

const endpoint = "https://ksm-playbook.nownodes.io/v1/blocks/{blockId}/header";
const apiKey = "YOUR_API_KEY";

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

  return response.json();
}

const result = await nownodesRequest({});
console.log(result);

const response = await fetch('https://ksm-playbook.nownodes.io/v1/blocks/{blockId}/header', {
  method: 'GET',
});

const data = await response.json();

import requests

response = requests.get('https://ksm-playbook.nownodes.io/v1/blocks/{blockId}/header')
data = response.json()

require 'net/http'
require 'json'

uri = URI('https://ksm-playbook.nownodes.io/v1/blocks/{blockId}/header')
request = Net::HTTP::Get.new(uri)

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

200

{}