Send a transaction using node-managed account

POST

https://eth-sepolia.nownodes.io/

Authorizations

ApiKeyAuthApiKeyAuth

api-key string

NOWNodes API key passed in the api-key header.

Executes the eth_sendTransaction JSON-RPC method on Ethereum through NOWNodes.

Body

application/json

Send a transaction using node-managed account

Request payload for Send a transaction using node-managed account.

jsonrpcstringrequired

JSON-RPC protocol version.

methodstringrequired

JSON-RPC method name.

paramsArray<object>required

Transaction object

Show child attributes

fromstring

Address the transaction is sent from

tostring

Address the transaction is directed to

gasstring

Gas provided for the transaction (hex)

gasPricestring

Gas price in wei (hex)

valuestring

Value sent with the transaction in wei (hex)

datastring

(Optional) Data for contract interaction

idintegerrequired

Client-provided request identifier echoed in the response.

Response

200OK

Transaction successfully sent

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

Upstream node or gateway error.

Send a transaction using node-managed account

curl -X POST 'https://eth-sepolia.nownodes.io/' \
  -H 'Content-Type: application/json' \
  -d '{
    "jsonrpc": "2.0",
    "method": "eth_sendTransaction",
    "params": [
      {
        "from": "0x6A0bF1017C6e6Dd9D2BA447E2AAd951F13F7F7C3",
        "to": "0x742d35Cc6634C0532925a3b844Bc454e4438f44e",
        "gas": "0x5208",
        "gasPrice": "0x3b9aca00",
        "value": "0x16345785d8a0000",
        "data": "0x"
      }
    ],
    "id": 1
  }'

import { JsonRpcProvider } from "ethers";

const provider = new JsonRpcProvider("https://eth-sepolia.nownodes.io/");
const result = await provider.send("eth_sendTransaction", [
  {
    "from": "0x6A0bF1017C6e6Dd9D2BA447E2AAd951F13F7F7C3",
    "to": "0x742d35Cc6634C0532925a3b844Bc454e4438f44e",
    "gas": "0x5208",
    "gasPrice": "0x3b9aca00",
    "value": "0x16345785d8a0000",
    "data": "0x"
  }
]);
console.log(result);

require 'eth'
require 'json'
require 'net/http'

uri = URI('https://eth-sepolia.nownodes.io/')
request = Net::HTTP::Post.new(uri)
request['Content-Type'] = 'application/json'
request.body = '{
  "jsonrpc": "2.0",
  "method": "eth_sendTransaction",
  "params": [
    {
      "from": "0x6A0bF1017C6e6Dd9D2BA447E2AAd951F13F7F7C3",
      "to": "0x742d35Cc6634C0532925a3b844Bc454e4438f44e",
      "gas": "0x5208",
      "gasPrice": "0x3b9aca00",
      "value": "0x16345785d8a0000",
      "data": "0x"
    }
  ],
  "id": 1
}'

response = Net::HTTP.start(uri.hostname, uri.port, use_ssl: true) do |http|
  http.request(request)
end

puts JSON.parse(response.body)

from web3 import Web3

w3 = Web3(Web3.HTTPProvider("https://eth-sepolia.nownodes.io/"))
response = w3.provider.make_request("eth_sendTransaction", [
  {
    "from": "0x6A0bF1017C6e6Dd9D2BA447E2AAd951F13F7F7C3",
    "to": "0x742d35Cc6634C0532925a3b844Bc454e4438f44e",
    "gas": "0x5208",
    "gasPrice": "0x3b9aca00",
    "value": "0x16345785d8a0000",
    "data": "0x"
  }
])
print(response)

import { createPublicClient, http } from "viem";

const client = createPublicClient({
  transport: http("https://eth-sepolia.nownodes.io/"),
});

const result = await client.request({
  method: "eth_sendTransaction",
  params: [
  {
    "from": "0x6A0bF1017C6e6Dd9D2BA447E2AAd951F13F7F7C3",
    "to": "0x742d35Cc6634C0532925a3b844Bc454e4438f44e",
    "gas": "0x5208",
    "gasPrice": "0x3b9aca00",
    "value": "0x16345785d8a0000",
    "data": "0x"
  }
],
});

console.log(result);

const endpoint = "https://eth-sepolia.nownodes.io/";
const apiKey = "YOUR_API_KEY";

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

  return response.json();
}

const result = await nownodesRequest({ jsonrpc: "2.0", method: "eth_sendTransaction", params: [
  {
    "from": "0x6A0bF1017C6e6Dd9D2BA447E2AAd951F13F7F7C3",
    "to": "0x742d35Cc6634C0532925a3b844Bc454e4438f44e",
    "gas": "0x5208",
    "gasPrice": "0x3b9aca00",
    "value": "0x16345785d8a0000",
    "data": "0x"
  }
], id: 1 });
console.log(result);

const response = await fetch('https://eth-sepolia.nownodes.io/', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
      "jsonrpc": "2.0",
      "method": "eth_sendTransaction",
      "params": [
        {
          "from": "0x6A0bF1017C6e6Dd9D2BA447E2AAd951F13F7F7C3",
          "to": "0x742d35Cc6634C0532925a3b844Bc454e4438f44e",
          "gas": "0x5208",
          "gasPrice": "0x3b9aca00",
          "value": "0x16345785d8a0000",
          "data": "0x"
        }
      ],
      "id": 1
    }),
});

const data = await response.json();

import requests

payload = {
  "jsonrpc": "2.0",
  "method": "eth_sendTransaction",
  "params": [
    {
      "from": "0x6A0bF1017C6e6Dd9D2BA447E2AAd951F13F7F7C3",
      "to": "0x742d35Cc6634C0532925a3b844Bc454e4438f44e",
      "gas": "0x5208",
      "gasPrice": "0x3b9aca00",
      "value": "0x16345785d8a0000",
      "data": "0x"
    }
  ],
  "id": 1
}

response = requests.post('https://eth-sepolia.nownodes.io/', json=payload)
data = response.json()

require 'net/http'
require 'json'

uri = URI('https://eth-sepolia.nownodes.io/')
request = Net::HTTP::Post.new(uri)
request['Content-Type'] = 'application/json'
request.body = '{
    "jsonrpc": "2.0",
    "method": "eth_sendTransaction",
    "params": [
      {
        "from": "0x6A0bF1017C6e6Dd9D2BA447E2AAd951F13F7F7C3",
        "to": "0x742d35Cc6634C0532925a3b844Bc454e4438f44e",
        "gas": "0x5208",
        "gasPrice": "0x3b9aca00",
        "value": "0x16345785d8a0000",
        "data": "0x"
      }
    ],
    "id": 1
  }'

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

Request Body

{
  "jsonrpc": "2.0",
  "method": "eth_sendTransaction",
  "params": [
    {
      "from": "0x6A0bF1017C6e6Dd9D2BA447E2AAd951F13F7F7C3",
      "to": "0x742d35Cc6634C0532925a3b844Bc454e4438f44e",
      "gas": "0x5208",
      "gasPrice": "0x3b9aca00",
      "value": "0x16345785d8a0000",
      "data": "0x"
    }
  ],
  "id": 1
}

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": "0x3333333333333333333333333333333333333333333333333333333333333333"
}

{
  "jsonrpc": "2.0",
  "id": 1,
  "error": {
    "code": -32602,
    "message": "invalid argument 0: json: cannot unmarshal string into Go value of type ethapi.TransactionArgs"
  }
}

Unknown API_key

Method Not Allowed

Missing API_key

{
  "jsonrpc": "2.0",
  "id": 1,
  "error": {
    "code": -32602,
    "message": "invalid argument 0: json: cannot unmarshal string into Go value of type ethapi.TransactionArgs"
  }
}

Documentation

How to migrate to NOWNodes

Send a transaction using node-managed account

Authorizations

Body

Response