Get chain id

GET

https://xtz.nownodes.io/monitor/heads/{chain_id}

Authorizations

ApiKeyAuthApiKeyAuth

api-key string

NOWNodes API key passed in the api-key header.

Monitor all blocks that are successfully validated and applied by the node and selected as the new head of the given chain.

Parameters

chain_idstringrequiredpath

A chain identifier. This is either a chain hash in Base58Check notation or a one the predefined aliases: 'main', 'test'.

protocolstringquery

Protocol_hash (Base58Check-encoded)

next_protocolstringquery

Protocol_hash (Base58Check-encoded)

Response

200OK

Successful response.

400Bad Request

Invalid request.

default

Error response.

Get chain id

curl -X GET 'https://xtz.nownodes.io/monitor/heads/{chain_id}'

const response = await fetch('https://xtz.nownodes.io/monitor/heads/{chain_id}', {
  method: 'GET',
});

const data = await response.json();

require 'net/http'
require 'json'

uri = URI('https://xtz.nownodes.io/monitor/heads/{chain_id}')
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://xtz.nownodes.io/monitor/heads/{chain_id}')
data = response.json()

const response = await fetch('https://xtz.nownodes.io/monitor/heads/{chain_id}', {
  method: 'GET',
});

const data = await response.json();

const endpoint = "https://xtz.nownodes.io/monitor/heads/{chain_id}";
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://xtz.nownodes.io/monitor/heads/{chain_id}', {
  method: 'GET',
});

const data = await response.json();

import requests

response = requests.get('https://xtz.nownodes.io/monitor/heads/{chain_id}')
data = response.json()

require 'net/http'
require 'json'

uri = URI('https://xtz.nownodes.io/monitor/heads/{chain_id}')
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)

{
  "hash": "ooRAfDhmSNiwEdGQi2M5qt27EVtBdh3WD7LX3Rpoet3BTUssKTT",
  "level": 15268314,
  "proto": 0,
  "predecessor": "string",
  "timestamp": "2026-10-07T10:21:25Z",
  "validation_pass": 0,
  "operations_hash": "ooRAfDhmSNiwEdGQi2M5qt27EVtBdh3WD7LX3Rpoet3BTUssKTT",
  "fitness": [
    "string"
  ],
  "context": "string",
  "protocol_data": "string"
}

{
  "error": "Invalid request parameters."
}

"string"