ToolVet
71trust / 100

Address Poisoning Check

by ChainAnalyzer in Onchain & crypto

x402 APIPassing, checked 3 h ago

Is this destination a lookalike of an address the sender already trusts? Applies the address-poisoning similarity rule (leading and trailing characters that wallet UIs abbreviate to) between one destination and a caller-supplied list of known-good addresses. Pure string comparison when `known` is given, so it answers in milliseconds and never runs a scan.

GET
https://chain-analyzer.com/api/v1/x402/address/:address/poisoning-check
Price
$0.05
per call in USDC
Uptime
100%
last 30 days
Response time
1.1 s
2.6 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://chain-analyzer.com/api/v1/x402/address/:address/poisoning-check

Each call costs $0.05 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://chain-analyzer.com/api/v1/x402/address/:address/poisoning-check?chain=ethereum&known=0x28c6c06298d514db089934071355e5743bf21d60

Parameters

ParameterTypeRequiredDescription
addressstringNo

Example response

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

{
  "address": "0x28c6000000000000000000000000000000001d60",
  "candidates_checked": 1,
  "candidates_source": "known",
  "chain": "ethereum",
  "lookalike_of": [
    {
      "address": "0x28c6c06298d514db089934071355e5743bf21d60",
      "matched_prefix": true,
      "matched_suffix": false,
      "similarity": 0.5
    }
  ],
  "verdict": "suspicious"
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.05.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://chain-analyzer.com/api/v1/x402/address/:address/poisoning-check?chain=ethereum&known=0x28c6c06298d514db089934071355e5743bf21d60'

# 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://chain-analyzer.com/api/v1/x402/address/:address/poisoning-check?chain=ethereum&known=0x28c6c06298d514db089934071355e5743bf21d60' \
  | 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 $0.05 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.05" });
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 $0.05 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fchain-analyzer.com%2Fapi%2Fv1%2Fx402%2Faddress%2F%3Aaddress%2Fpoisoning-check
const res = await pay("https://chain-analyzer.com/api/v1/x402/address/:address/poisoning-check?chain=ethereum&known=0x28c6c06298d514db089934071355e5743bf21d60");
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 $0.05 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.05"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://chain-analyzer.com/api/v1/x402/address/:address/poisoning-check?chain=ethereum&known=0x28c6c06298d514db089934071355e5743bf21d60")
    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 agoPassed4021.1 s$0.05
8 h agoPassed4021.1 s$0.05
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Show 10 older checks
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3 days agoPassed402265 ms$0.05