Legacy broadcast transaction using the request body.

POST

https://btcbook-testnet4.nownodes.io/api/v1/sendtx

Authorizations

ApiKeyAuthApiKeyAuth

api-key string

NOWNodes API key passed in the api-key header.

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

Load estimate: High; validates and forwards to the backend, with cost growing with transaction size and backend mempool policy checks.

Body

text/plain

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

Load estimate: High; validates and forwards to the backend, with cost growing with transaction size and backend mempool policy checks.

text/plainstring

Alternative schema variant for this parameter or payload.

string

application/jsonobject

Alternative schema variant for this parameter or payload.

object

Response

200OK

Broadcast result.

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

default

Public API error.

Legacy broadcast transaction using the request body.

curl -X POST 'https://btcbook-testnet4.nownodes.io/api/v1/sendtx/' \
  -H 'Content-Type: text/plain' \
  -d '"0x00"'

const response = await fetch('https://btcbook-testnet4.nownodes.io/api/v1/sendtx/', {
  method: 'POST',
  headers: {
    'Content-Type': 'text/plain',
  },
  body: JSON.stringify("0x00"),
});

const data = await response.json();

require 'net/http'
require 'json'

uri = URI('https://btcbook-testnet4.nownodes.io/api/v1/sendtx/')
request = Net::HTTP::Post.new(uri)
request['Content-Type'] = 'text/plain'
request.body = '"0x00"'

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

import requests

payload = "0x00"

response = requests.post('https://btcbook-testnet4.nownodes.io/api/v1/sendtx/', json=payload)
data = response.json()

const response = await fetch('https://btcbook-testnet4.nownodes.io/api/v1/sendtx/', {
  method: 'POST',
  headers: {
    'Content-Type': 'text/plain',
  },
  body: JSON.stringify("0x00"),
});

const data = await response.json();

const endpoint = "https://btcbook-testnet4.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("0x00");
console.log(result);

const response = await fetch('https://btcbook-testnet4.nownodes.io/api/v1/sendtx/', {
  method: 'POST',
  headers: {
    'Content-Type': 'text/plain',
  },
  body: JSON.stringify("0x00"),
});

const data = await response.json();

import requests

payload = "0x00"

response = requests.post('https://btcbook-testnet4.nownodes.io/api/v1/sendtx/', json=payload)
data = response.json()

require 'net/http'
require 'json'

uri = URI('https://btcbook-testnet4.nownodes.io/api/v1/sendtx/')
request = Net::HTTP::Post.new(uri)
request['Content-Type'] = 'text/plain'
request.body = '"0x00"'

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

Request Body

0x00

{}

{
  "result": "7c3be24063f268aaa1ed81b64776798f56088757641a34fb156c4f51ed2e9d25"
}

Unknown API_key

Method Not Allowed

Missing API_key

{
  "result": "7c3be24063f268aaa1ed81b64776798f56088757641a34fb156c4f51ed2e9d25"
}

{
  "error": "Invalid transaction hex"
}