Ethereum method - eth_call

POST

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

Authorizations

ApiKeyAuthApiKeyAuth

api-key string

NOWNodes API key passed in the api-key header.

Executes a call to a contract or address and returns the result without broadcasting a transaction.

Body

application/json

Executes a call to a contract or address and returns the result without broadcasting a transaction.

Request payload for Executes a call to a contract or address and returns the result without broadcasting a transaction..

jsonrpcstringrequired

JSON-RPC protocol version.

methodstringrequired

JSON-RPC method name.

paramsArray<object | string>required

The first object specifies the call transaction object. The second (optional) parameter specifies the block context.

Show child attributes

Single JSON-RPC parameter value accepted by this method.

One of

fromstring

Address the call is sent from (optional)

tostringrequired

Target address for the call (required)

gasstring

Gas provided for the call, as hex

gasPricestring

Gas price in wei, as hex

valuestring

Amount of ETH sent, as hex (optional)

datastring

Compiled contract method call data

(Optional) Integer block number, or the string "latest", "earliest", or "pending".

string

idintegerrequired

Client-provided request identifier echoed in the response.

Response

200OK

Result of the call

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.

Ethereum method - eth_call

curl -X POST 'https://eth-sepolia.nownodes.io/' \
  -H 'Content-Type: application/json' \
  -d '{
    "jsonrpc": "2.0",
    "method": "eth_call",
    "params": [
      {
        "from": "0x742d35Cc6634C0532925a3b844Bc454e4438f44e",
        "to": "0xdAC17F958D2ee523a2206206994597C13D831ec7",
        "gas": "0x76c0",
        "gasPrice": "0x9184e72a000",
        "value": "0x0",
        "data": "0x70a08231000000000000000000000000a0df350d2637096571f7a701cbc1c5fd..."
      }
    ],
    "id": 1
  }'

import { JsonRpcProvider } from "ethers";

const provider = new JsonRpcProvider("https://eth-sepolia.nownodes.io/");
const result = await provider.send("eth_call", [
  {
    "from": "0x742d35Cc6634C0532925a3b844Bc454e4438f44e",
    "to": "0xdAC17F958D2ee523a2206206994597C13D831ec7",
    "gas": "0x76c0",
    "gasPrice": "0x9184e72a000",
    "value": "0x0",
    "data": "0x70a08231000000000000000000000000a0df350d2637096571f7a701cbc1c5fd..."
  }
]);
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_call",
  "params": [
    {
      "from": "0x742d35Cc6634C0532925a3b844Bc454e4438f44e",
      "to": "0xdAC17F958D2ee523a2206206994597C13D831ec7",
      "gas": "0x76c0",
      "gasPrice": "0x9184e72a000",
      "value": "0x0",
      "data": "0x70a08231000000000000000000000000a0df350d2637096571f7a701cbc1c5fd..."
    }
  ],
  "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_call", [
  {
    "from": "0x742d35Cc6634C0532925a3b844Bc454e4438f44e",
    "to": "0xdAC17F958D2ee523a2206206994597C13D831ec7",
    "gas": "0x76c0",
    "gasPrice": "0x9184e72a000",
    "value": "0x0",
    "data": "0x70a08231000000000000000000000000a0df350d2637096571f7a701cbc1c5fd..."
  }
])
print(response)

import { createPublicClient, http } from "viem";

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

const result = await client.request({
  method: "eth_call",
  params: [
  {
    "from": "0x742d35Cc6634C0532925a3b844Bc454e4438f44e",
    "to": "0xdAC17F958D2ee523a2206206994597C13D831ec7",
    "gas": "0x76c0",
    "gasPrice": "0x9184e72a000",
    "value": "0x0",
    "data": "0x70a08231000000000000000000000000a0df350d2637096571f7a701cbc1c5fd..."
  }
],
});

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_call", params: [
  {
    "from": "0x742d35Cc6634C0532925a3b844Bc454e4438f44e",
    "to": "0xdAC17F958D2ee523a2206206994597C13D831ec7",
    "gas": "0x76c0",
    "gasPrice": "0x9184e72a000",
    "value": "0x0",
    "data": "0x70a08231000000000000000000000000a0df350d2637096571f7a701cbc1c5fd..."
  }
], 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_call",
      "params": [
        {
          "from": "0x742d35Cc6634C0532925a3b844Bc454e4438f44e",
          "to": "0xdAC17F958D2ee523a2206206994597C13D831ec7",
          "gas": "0x76c0",
          "gasPrice": "0x9184e72a000",
          "value": "0x0",
          "data": "0x70a08231000000000000000000000000a0df350d2637096571f7a701cbc1c5fd..."
        }
      ],
      "id": 1
    }),
});

const data = await response.json();

import requests

payload = {
  "jsonrpc": "2.0",
  "method": "eth_call",
  "params": [
    {
      "from": "0x742d35Cc6634C0532925a3b844Bc454e4438f44e",
      "to": "0xdAC17F958D2ee523a2206206994597C13D831ec7",
      "gas": "0x76c0",
      "gasPrice": "0x9184e72a000",
      "value": "0x0",
      "data": "0x70a08231000000000000000000000000a0df350d2637096571f7a701cbc1c5fd..."
    }
  ],
  "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_call",
    "params": [
      {
        "from": "0x742d35Cc6634C0532925a3b844Bc454e4438f44e",
        "to": "0xdAC17F958D2ee523a2206206994597C13D831ec7",
        "gas": "0x76c0",
        "gasPrice": "0x9184e72a000",
        "value": "0x0",
        "data": "0x70a08231000000000000000000000000a0df350d2637096571f7a701cbc1c5fd..."
      }
    ],
    "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_call",
  "params": [
    {
      "from": "0x742d35Cc6634C0532925a3b844Bc454e4438f44e",
      "to": "0xdAC17F958D2ee523a2206206994597C13D831ec7",
      "gas": "0x76c0",
      "gasPrice": "0x9184e72a000",
      "value": "0x0",
      "data": "0x70a08231000000000000000000000000a0df350d2637096571f7a701cbc1c5fd..."
    }
  ],
  "id": 1
}

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

{
  "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

Ethereum method - eth_call

Authorizations

Body

Response