ToolVet
77trust / 100

Evm Logs

by SiteCheck in Onchain & crypto

x402 APIPassing, checked 3 h ago

Event logs of a contract over recent blocks (default 1,000, max 5,000), newest first, max 100: block, transaction hash, topics and data. topic0 takes an event signature such as Transfer(address,address,uint256) or a 32-byte hash. Public nodes refuse very large results: narrow the range or add topic0.

GET
https://api.sitecheck-api.workers.dev/api/evm/logs
Price
$0.003
per call in USDC
Uptime
90.9%
last 30 days
Response time
179 ms
1.0 s slowest 5%
Last check
Passed
3 h ago, next any minute now

Run a free test callHow to call it

Reliability

All checks passedSome failedAll failedNot checked

Status and outage history · Atom feed · Watch with other listings

How to call it

GET https://api.sitecheck-api.workers.dev/api/evm/logs

Each call costs $0.003 in USDC on Base, paid with the request over x402.

Run a free test callOne unpaid request, the way an agent sends it. You see the payment challenge it gets back. Nothing is charged.

Example request

From the listing.

GET https://api.sitecheck-api.workers.dev/api/evm/logs?blocks=5&chain=base&contract=0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913&topic0=Transfer%28address%2Caddress%2Cuint256%29

Parameters

ParameterTypeRequiredDescription
blocksstringNoBlocks to search back from the latest (max 5000)
chainstringNobase (default), ethereum, arbitrum, optimism or polygon
contractstringYesContract address, 0x…
topic0stringNoEvent signature, e.g. Transfer(address,address,uint256), or a 32-byte hash

Example response

The provider's example. We can't check it without paying.

Example response, 37 lines
{
  "chain": "base",
  "checkedAt": "2026-10-14T04:49:19.284Z",
  "contract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
  "count": 100,
  "disclaimer": "Information only, not financial advice.",
  "logs": [
    {
      "block": 52582002,
      "data": "0x00000000000000000000000000000000000000000000000000000000002ca077",
      "logIndex": 1,
      "topics": [
        "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef",
        "0x0000000000000000000000002610bbdd829f00fef0acf572a610391aa76f549c"
      ],
      "txHash": "0x1eee8e31f014e26b5de018b0b958261ad564ff8efc81caf64366b38fc5fc30c2"
    },
    {
      "block": 52582002,
      "data": "0x00000000000000000000000000000000000000000000000000000000002ca077",
      "logIndex": 3,
      "topics": [
        "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef",
        "0x000000000000000000000000fdf682f51fe81aa4898f0ae2163d8a55c127fbc7"
      ],
      "txHash": "0x1eee8e31f014e26b5de018b0b958261ad564ff8efc81caf64366b38fc5fc30c2"
    }
  ],
  "source": "https://base-rpc.publicnode.com (eth_blockNumber, eth_getLogs)",
  "topic0": "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef",
  "truncated": true,
  "window": {
    "blocks": 5,
    "fromBlock": 52582002,
    "toBlock": 52582006
  }
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.003.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://api.sitecheck-api.workers.dev/api/evm/logs?blocks=5&chain=base&contract=0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913&topic0=Transfer%28address%2Caddress%2Cuint256%29'

# x402 v2 sends the challenge base64-encoded in the PAYMENT-REQUIRED header (v1 sends it in the body).
# To read the header:
curl -sS -g -o /dev/null -D - 'https://api.sitecheck-api.workers.dev/api/evm/logs?blocks=5&chain=base&contract=0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913&topic0=Transfer%28address%2Caddress%2Cuint256%29' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode
JavaScript: pay and call
// npm i @x402/fetch @x402/evm viem
import { wrapFetchWithPayment, x402Client } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

// Pays at most $0.003 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.003" });
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.EVM_PRIVATE_KEY) });
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? ToolVet checks it first for $0.005. Pay for that from a separate
// client: this one is capped at $0.003 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapi.sitecheck-api.workers.dev%2Fapi%2Fevm%2Flogs
const res = await pay("https://api.sitecheck-api.workers.dev/api/evm/logs?blocks=5&chain=base&contract=0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913&topic0=Transfer%28address%2Caddress%2Cuint256%29");
console.log(res.status, await res.text());
Python: pay and call
# pip install "x402[requests,evm]"
import os
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client

# Pays at most $0.003 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.003"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://api.sitecheck-api.workers.dev/api/evm/logs?blocks=5&chain=base&contract=0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913&topic0=Transfer%28address%2Caddress%2Cuint256%29")
    print(res.status_code, res.text)

Security scan

No findings

We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.

Recent checks

WhenResultHTTPTimePrice
3 h agoPassed402158 ms$0.003
8 h agoPassed402451 ms$0.003
12 h agoPassed402179 ms$0.003
16 h agoPassed4021.0 s$0.003
20 h agoPassed402653 ms$0.003
Show 6 older checks
25 h agoPassed402652 ms$0.003
29 h agoPassed402168 ms$0.003
33 h agoPassed402121 ms$0.003
37 h agoPassed402642 ms$0.003
42 h agoPassed402162 ms$0.003
45 h agoExpected HTTP 402, got 5035032.6 s-