Legacy get block hash by height.

GET

https://btcbook-testnet4.nownodes.io/api/v1/block-index/{height}

Authorizations

ApiKeyAuthApiKeyAuth

api-key string

NOWNodes API key passed in the api-key header.

Bitcore Insight-compatible V1 route for Bitcoin-type coins.

Load estimate: Low; indexed height-to-hash lookup.

Parameters

heightinteger>= 0requiredpath

Block height on the backend main chain.

Response

200OK

Block hash at the requested height.

400Bad Request

Bad Request

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

503Service Unavailable

Service Unavailable

default

Public API error.

Legacy get block hash by height.

curl -X GET 'https://btcbook-testnet4.nownodes.io/api/v1/block-index/{height}'

const response = await fetch('https://btcbook-testnet4.nownodes.io/api/v1/block-index/{height}', {
  method: 'GET',
});

const data = await response.json();

require 'net/http'
require 'json'

uri = URI('https://btcbook-testnet4.nownodes.io/api/v1/block-index/{height}')
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://btcbook-testnet4.nownodes.io/api/v1/block-index/{height}')
data = response.json()

const response = await fetch('https://btcbook-testnet4.nownodes.io/api/v1/block-index/{height}', {
  method: 'GET',
});

const data = await response.json();

const endpoint = "https://btcbook-testnet4.nownodes.io/api/v1/block-index/{height}";
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://btcbook-testnet4.nownodes.io/api/v1/block-index/{height}', {
  method: 'GET',
});

const data = await response.json();

import requests

response = requests.get('https://btcbook-testnet4.nownodes.io/api/v1/block-index/{height}')
data = response.json()

require 'net/http'
require 'json'

uri = URI('https://btcbook-testnet4.nownodes.io/api/v1/block-index/{height}')
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)

{
  "blockHash": "0000000000000000000b7b8574bc6fd285825ec2dbcbeca149121fc05b0c828c"
}

{}

Unknown API_key

Method Not Allowed

Missing API_key

{}

{}

{
  "error": "Block not found"
}