Broadcast a raw transaction using the path.

GET

https://arb-blockbook.nownodes.io/api/v2/sendtx/{hex}

Authorizations

ApiKeyAuthApiKeyAuth

api-key string

NOWNodes API key passed in the api-key header.

Modified between 0.5.0 and 0.6.0: request-size hardening limits the broadcast body size; the backend can relay broadcasts through an alternative (e.g. private/MEV) provider; per-client REST rate limiting. Documented as it exists in 0.6.0.

Broadcasts hex-encoded raw transaction data. Prefer POST for large payloads.

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

Parameters

hexstringrequiredpath

Raw transaction.

Response

200OK

HTTP 200 Arbitrum Blockbook response for sendTransactionByGet.

400Bad Request

Domain or validation error. JSON body {"error": "..."}.

401Unauthorized

Unauthorized: missing or invalid api-key header. The NOWNodes gateway returns the plain-text body "Unknown API_key".

405Method Not Allowed

Method Not Allowed: gateway-level response for unknown routes.

500Internal Server Error

Internal Server Error. JSON body {"error":"Internal server error"}.

Broadcast a raw transaction using the path.

curl -X GET 'https://arb-blockbook.nownodes.io/api/v2/sendtx/{hex}'

const response = await fetch('https://arb-blockbook.nownodes.io/api/v2/sendtx/{hex}', {
  method: 'GET',
});

const data = await response.json();

require 'net/http'
require 'json'

uri = URI('https://arb-blockbook.nownodes.io/api/v2/sendtx/{hex}')
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://arb-blockbook.nownodes.io/api/v2/sendtx/{hex}')
data = response.json()

const response = await fetch('https://arb-blockbook.nownodes.io/api/v2/sendtx/{hex}', {
  method: 'GET',
});

const data = await response.json();

const endpoint = "https://arb-blockbook.nownodes.io/api/v2/sendtx/{hex}";
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://arb-blockbook.nownodes.io/api/v2/sendtx/{hex}', {
  method: 'GET',
});

const data = await response.json();

import requests

response = requests.get('https://arb-blockbook.nownodes.io/api/v2/sendtx/{hex}')
data = response.json()

require 'net/http'
require 'json'

uri = URI('https://arb-blockbook.nownodes.io/api/v2/sendtx/{hex}')
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)

{
  "result": "7c3be24063f268aaa1ed81b64776798f56088757641a34fb156c4f51ed2e9d25"
}

{
  "error": "Invalid transaction hex"
}

{
  "error": "Invalid transaction hex"
}

Unknown API_key

Method Not Allowed

{
  "error": "Internal server error"
}