eth_getLogs | Monad - Chainstack

eth_getLogs

curl --request POST \
  --url https://monad-testnet.core.chainstack.com/9c5b265f20b3ea5df4f54f70eb74b800/ \
  --header 'Content-Type: application/json' \
  --data '
{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "eth_getLogs",
  "params": [
    {
      "fromBlock": "latest",
      "toBlock": "latest"
    }
  ]
}
'

import requests

url = "https://monad-testnet.core.chainstack.com/9c5b265f20b3ea5df4f54f70eb74b800/"

payload = {
    "id": 1,
    "jsonrpc": "2.0",
    "method": "eth_getLogs",
    "params": [
        {
            "fromBlock": "latest",
            "toBlock": "latest"
        }
    ]
}
headers = {"Content-Type": "application/json"}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {'Content-Type': 'application/json'},
  body: JSON.stringify({
    id: 1,
    jsonrpc: '2.0',
    method: 'eth_getLogs',
    params: [{fromBlock: 'latest', toBlock: 'latest'}]
  })
};

fetch('https://monad-testnet.core.chainstack.com/9c5b265f20b3ea5df4f54f70eb74b800/', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://monad-testnet.core.chainstack.com/9c5b265f20b3ea5df4f54f70eb74b800/",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'id' => 1,
    'jsonrpc' => '2.0',
    'method' => 'eth_getLogs',
    'params' => [
        [
                'fromBlock' => 'latest',
                'toBlock' => 'latest'
        ]
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://monad-testnet.core.chainstack.com/9c5b265f20b3ea5df4f54f70eb74b800/"

	payload := strings.NewReader("{\n  \"id\": 1,\n  \"jsonrpc\": \"2.0\",\n  \"method\": \"eth_getLogs\",\n  \"params\": [\n    {\n      \"fromBlock\": \"latest\",\n      \"toBlock\": \"latest\"\n    }\n  ]\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://monad-testnet.core.chainstack.com/9c5b265f20b3ea5df4f54f70eb74b800/")
  .header("Content-Type", "application/json")
  .body("{\n  \"id\": 1,\n  \"jsonrpc\": \"2.0\",\n  \"method\": \"eth_getLogs\",\n  \"params\": [\n    {\n      \"fromBlock\": \"latest\",\n      \"toBlock\": \"latest\"\n    }\n  ]\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://monad-testnet.core.chainstack.com/9c5b265f20b3ea5df4f54f70eb74b800/")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Content-Type"] = 'application/json'
request.body = "{\n  \"id\": 1,\n  \"jsonrpc\": \"2.0\",\n  \"method\": \"eth_getLogs\",\n  \"params\": [\n    {\n      \"fromBlock\": \"latest\",\n      \"toBlock\": \"latest\"\n    }\n  ]\n}"

response = http.request(request)
puts response.read_body

{
  "jsonrpc": "<string>",
  "id": 123,
  "result": [
    {}
  ]
}

POST

eth_getLogs

curl --request POST \
  --url https://monad-testnet.core.chainstack.com/9c5b265f20b3ea5df4f54f70eb74b800/ \
  --header 'Content-Type: application/json' \
  --data '
{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "eth_getLogs",
  "params": [
    {
      "fromBlock": "latest",
      "toBlock": "latest"
    }
  ]
}
'

import requests

url = "https://monad-testnet.core.chainstack.com/9c5b265f20b3ea5df4f54f70eb74b800/"

payload = {
    "id": 1,
    "jsonrpc": "2.0",
    "method": "eth_getLogs",
    "params": [
        {
            "fromBlock": "latest",
            "toBlock": "latest"
        }
    ]
}
headers = {"Content-Type": "application/json"}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {'Content-Type': 'application/json'},
  body: JSON.stringify({
    id: 1,
    jsonrpc: '2.0',
    method: 'eth_getLogs',
    params: [{fromBlock: 'latest', toBlock: 'latest'}]
  })
};

fetch('https://monad-testnet.core.chainstack.com/9c5b265f20b3ea5df4f54f70eb74b800/', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://monad-testnet.core.chainstack.com/9c5b265f20b3ea5df4f54f70eb74b800/",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'id' => 1,
    'jsonrpc' => '2.0',
    'method' => 'eth_getLogs',
    'params' => [
        [
                'fromBlock' => 'latest',
                'toBlock' => 'latest'
        ]
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://monad-testnet.core.chainstack.com/9c5b265f20b3ea5df4f54f70eb74b800/"

	payload := strings.NewReader("{\n  \"id\": 1,\n  \"jsonrpc\": \"2.0\",\n  \"method\": \"eth_getLogs\",\n  \"params\": [\n    {\n      \"fromBlock\": \"latest\",\n      \"toBlock\": \"latest\"\n    }\n  ]\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://monad-testnet.core.chainstack.com/9c5b265f20b3ea5df4f54f70eb74b800/")
  .header("Content-Type", "application/json")
  .body("{\n  \"id\": 1,\n  \"jsonrpc\": \"2.0\",\n  \"method\": \"eth_getLogs\",\n  \"params\": [\n    {\n      \"fromBlock\": \"latest\",\n      \"toBlock\": \"latest\"\n    }\n  ]\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://monad-testnet.core.chainstack.com/9c5b265f20b3ea5df4f54f70eb74b800/")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Content-Type"] = 'application/json'
request.body = "{\n  \"id\": 1,\n  \"jsonrpc\": \"2.0\",\n  \"method\": \"eth_getLogs\",\n  \"params\": [\n    {\n      \"fromBlock\": \"latest\",\n      \"toBlock\": \"latest\"\n    }\n  ]\n}"

response = http.request(request)
puts response.read_body

{
  "jsonrpc": "<string>",
  "id": 123,
  "result": [
    {}
  ]
}

Monad API method that returns an array of all logs matching a given filter object. This is essential for tracking events emitted by smart contracts.

Monad-specific behavior: eth_getLogs has a maximum block range (typically 1000 blocks). Because Monad blocks are much larger than Ethereum blocks, use small block ranges (1-10 blocks) for optimal performance. Requests with longer ranges can take a long time or time out.

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Parameters

object — the filter options:
- fromBlock (optional) — integer block number, or latest, earliest, pending
- toBlock (optional) — integer block number, or latest, earliest, pending
- address (optional) — contract address or list of addresses from which logs should originate
- topics (optional) — array of 32-byte data topics
- blockhash (optional) — restricts logs to a single block with the given hash

Response

result — array of log objects, or an empty array if nothing has changed:
- removed — true when the log was removed due to chain reorganization
- logIndex — integer of the log index position in the block
- transactionIndex — integer of the transaction’s index position
- transactionHash — hash of the transaction that generated this log
- blockHash — hash of the block containing this log
- blockNumber — block number containing this log
- address — address from which this log originated
- data — non-indexed arguments of the log
- topics — array of indexed log arguments

`eth_getLogs` code examples

const { ethers } = require("ethers");

const provider = new ethers.JsonRpcProvider("CHAINSTACK_NODE_URL");

async function getLogs() {
  const logs = await provider.getLogs({
    fromBlock: "latest",
    toBlock: "latest",
    address: "0x..." // Optional: filter by contract address
  });
  console.log(logs);
}

getLogs();

from web3 import Web3

node_url = "CHAINSTACK_NODE_URL"

web3 = Web3(Web3.HTTPProvider(node_url))

logs = web3.eth.get_logs({
    'fromBlock': 'latest',
    'toBlock': 'latest',
    'address': '0x...' # Optional: filter by contract address
})

for log in logs:
    print(log)

Use case

A practical use case for eth_getLogs is tracking specific events from smart contracts, such as token transfers, swaps, or any custom events defined in your contracts.

Body

application/json

integer

default:1

jsonrpc

string

default:2.0

method

string

default:eth_getLogs

params

object[]

Show child attributes

Response

200 - application/json

An array of log objects.

jsonrpc

string

integer

result

object[]

Last modified on June 22, 2026

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Chainstack platform API

eth_getLogs | Monad

Parameters

Response

`eth_getLogs` code examples

Use case

Body

Response

​Parameters

​Response

​eth_getLogs code examples

​Use case

Body

Response

Parameters

Response

`eth_getLogs` code examples

Use case