ToolVet
15trust / 100

Agent Intel Bytecode Similarity Radar

by SiteCheck Agent Intel & Dev in Onchain & crypto

x402 APIFailing, checked 5 h ago

Compares the runtime bytecode of two Ethereum contracts you name: the share of shared PUSH4 function selectors (Jaccard) and the cosine similarity of their opcode frequencies, combined into one 0 to 1 score with a SIMILAR, PARTIAL or DIFFERENT label. It compares two addresses only; it has no database of known scam or exploit templates, so it cannot say a contract is a known clone.

GET
https://api.fadeandco.workers.dev/api/agent-intel/bytecode-similarity-radar
Price
$0.003
per call in USDC
Uptime
0.0%
last 30 days
Response time
-
no timed checks yet
Last check
Failed
5 h ago, next any minute now

Run a free test callHow to call it

Reliability

All checks passedSome failedAll failedNot checked

Latest check failed 5 h ago: Amount "0.003" is not in atomic token units

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

How to call it

GET https://api.fadeandco.workers.dev/api/agent-intel/bytecode-similarity-radar

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.fadeandco.workers.dev/api/agent-intel/bytecode-similarity-radar?a=0x6982508145454Ce325dDbE47a25d4ec3d2311933&b=0xdAC17F958D2ee523a2206206994597C13D831ec7

Parameters

ParameterTypeRequiredDescription
astringYesFirst contract address 0x... (40 hex)
bstringYesSecond contract address 0x... (40 hex)

Example response

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

{
  "a": "0x6982508145454ce325ddbe47a25d4ec3d2311933",
  "b": "0xdac17f958d2ee523a2206206994597c13d831ec7",
  "bytesA": 4517,
  "bytesB": 11075,
  "checkedAt": "2026-10-23T09:35:17.855Z",
  "label": "PARTIAL",
  "note": "Pairwise comparison of two given contracts only. Not a database of known scam templates; a SIMILAR label is a lead for review.",
  "opcodeCosine": 0.898,
  "score": 0.559,
  "selectorJaccard": 0.22,
  "selectorsA": 25,
  "selectorsB": 36,
  "sharedSelectors": 11,
  "source": "https://ethereum-rpc.publicnode.com"
}

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.fadeandco.workers.dev/api/agent-intel/bytecode-similarity-radar?a=0x6982508145454Ce325dDbE47a25d4ec3d2311933&b=0xdAC17F958D2ee523a2206206994597C13D831ec7'

# 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.fadeandco.workers.dev/api/agent-intel/bytecode-similarity-radar?a=0x6982508145454Ce325dDbE47a25d4ec3d2311933&b=0xdAC17F958D2ee523a2206206994597C13D831ec7' \
  | 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.fadeandco.workers.dev%2Fapi%2Fagent-intel%2Fbytecode-similarity-radar
const res = await pay("https://api.fadeandco.workers.dev/api/agent-intel/bytecode-similarity-radar?a=0x6982508145454Ce325dDbE47a25d4ec3d2311933&b=0xdAC17F958D2ee523a2206206994597C13D831ec7");
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.fadeandco.workers.dev/api/agent-intel/bytecode-similarity-radar?a=0x6982508145454Ce325dDbE47a25d4ec3d2311933&b=0xdAC17F958D2ee523a2206206994597C13D831ec7")
    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
5 h agoAmount "0.003" is not in atomic token units402128 ms$0.003
13 h agoAmount "0.003" is not in atomic token units402108 ms$0.003
21 h agoAmount "0.003" is not in atomic token units40293 ms$0.003
29 h agoAmount "0.003" is not in atomic token units40290 ms$0.003
37 h agoAmount "0.003" is not in atomic token units402140 ms$0.003
Show 10 older checks
46 h agoAmount "0.003" is not in atomic token units402103 ms$0.003
2 days agoAmount "0.003" is not in atomic token units40297 ms$0.003
3 days agoAmount "0.003" is not in atomic token units40299 ms$0.003
3 days agoAmount "0.003" is not in atomic token units402903 ms$0.003
3 days agoAmount "0.003" is not in atomic token units402105 ms$0.003
3 days agoAmount "0.003" is not in atomic token units4022.1 s$0.003
4 days agoAmount "0.003" is not in atomic token units40228 ms$0.003
4 days agoAmount "0.003" is not in atomic token units402103 ms$0.003
4 days agoAmount "0.003" is not in atomic token units40240 ms$0.003
5 days agoAmount "0.003" is not in atomic token units40239 ms$0.003