Legacy broadcast transaction using the request body.

POST

https://kmdbook.nownodes.io/api/v1/sendtx

Authorizations

ApiKeyAuthApiKeyAuth

api-key string

NOWNodes API key passed in the api-key header.

ApiKeyAuthApiKeyAuth

X-API-Key string

NOWNodes API key passed in the api-key header.

Bitcore Insight-compatible V1 broadcast route (POST variant). The trailing slash is mandatory.

live-verified behavior:

Write operation. Success scenario not executed intentionally; error scenario validated live: non-hex body -> HTTP 400 {"error":"-22: TX decode failed"}.

Body

text/plain

Hex-encoded raw transaction, sent as text/plain.

string

Response

200OK

Broadcast result.

400Bad Request

Public API error (JSON).

401Unauthorized

Missing or invalid API key (plain text).

Legacy broadcast transaction using the request body.

curl -X POST 'https://kmdbook.nownodes.io/api/v1/sendtx/' \
  -H 'Content-Type: text/plain' \
  -d '"0400008085202f890b2890d1aab1b13b..."'

const response = await fetch('https://kmdbook.nownodes.io/api/v1/sendtx/', {
  method: 'POST',
  headers: {
    'Content-Type': 'text/plain',
  },
  body: JSON.stringify("0400008085202f890b2890d1aab1b13b..."),
});

const data = await response.json();

require 'net/http'
require 'json'

uri = URI('https://kmdbook.nownodes.io/api/v1/sendtx/')
request = Net::HTTP::Post.new(uri)
request['Content-Type'] = 'text/plain'
request.body = '"0400008085202f890b2890d1aab1b13b..."'

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

import requests

payload = "0400008085202f890b2890d1aab1b13b..."

response = requests.post('https://kmdbook.nownodes.io/api/v1/sendtx/', json=payload)
data = response.json()

const response = await fetch('https://kmdbook.nownodes.io/api/v1/sendtx/', {
  method: 'POST',
  headers: {
    'Content-Type': 'text/plain',
  },
  body: JSON.stringify("0400008085202f890b2890d1aab1b13b..."),
});

const data = await response.json();

const endpoint = "https://kmdbook.nownodes.io/api/v1/sendtx/";
const apiKey = "YOUR_API_KEY";

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

  return response.json();
}

const result = await nownodesRequest("0400008085202f890b2890d1aab1b13b...");
console.log(result);

const response = await fetch('https://kmdbook.nownodes.io/api/v1/sendtx/', {
  method: 'POST',
  headers: {
    'Content-Type': 'text/plain',
  },
  body: JSON.stringify("0400008085202f890b2890d1aab1b13b..."),
});

const data = await response.json();

import requests

payload = "0400008085202f890b2890d1aab1b13b..."

response = requests.post('https://kmdbook.nownodes.io/api/v1/sendtx/', json=payload)
data = response.json()

require 'net/http'
require 'json'

uri = URI('https://kmdbook.nownodes.io/api/v1/sendtx/')
request = Net::HTTP::Post.new(uri)
request['Content-Type'] = 'text/plain'
request.body = '"0400008085202f890b2890d1aab1b13b..."'

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

Request Body

0400008085202f890b2890d1aab1b13b...

{
  "result": "c1e5c301b467ba98e0588e376fac027e4f3a6a91e4291f3a9b711a6028312fe8"
}

{
  "error": "-22: TX decode failed"
}

{
  "error": "-22: TX decode failed"
}

Unknown API_key