ToolVet
78trust / 100

Domain Typosquat

by SiteCheck in Onchain & crypto

x402 APIPassing, checked 4 h ago

Generates lookalike domains of a brand (omission, transposition, repetition, bit-flip, homoglyph, vowel swap, hyphenation, TLD swap; technique list after dnstwist), checks up to 30 of them in DNS (A records), and reads MX records for up to 8 that resolve. Resolving in DNS is not proof of registration or abuse.

GET
https://api.sitecheck-api.workers.dev/api/domain/typosquat
Price
$0.002
per call in USDC
Uptime
100%
last 30 days
Response time
135 ms
135 ms slowest 5%
Last check
Passed
4 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/domain/typosquat

Each call costs $0.002 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/domain/typosquat?domain=example.com

Parameters

ParameterTypeRequiredDescription
domainstringYesBrand domain, e.g. example.com (a host name with a dot, no scheme or path)
limitstringNoVariants to look up in DNS, 1-40 (default 40)

Example response

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

Example response, 46 lines
{
  "checkedAt": "2026-10-15T19:15:18.095Z",
  "domain": "example.com",
  "looked": 40,
  "note": "DNS only: a name that resolves may be parked, not malicious; a name that does not resolve may still be registered. MX lookups limited to 9 domains per call.",
  "registered": [
    {
      "a": [
        "104.20.21.8",
        "172.66.175.59"
      ],
      "domain": "example.net",
      "mx": [],
      "nullMx": true,
      "technique": "tld-swap"
    },
    {
      "a": [
        "172.66.157.237",
        "104.20.26.136"
      ],
      "domain": "example.org",
      "mx": [],
      "nullMx": true,
      "technique": "tld-swap"
    },
    {
      "a": [
        "172.67.143.199",
        "104.21.39.76"
      ],
      "domain": "example.co",
      "mx": [
        "route2.mx.cloudflare.net",
        "route3.mx.cloudflare.net",
        "route1.mx.cloudflare.net"
      ],
      "nullMx": false,
      "technique": "tld-swap"
    }
  ],
  "resolving": 25,
  "source": "Variant techniques after dnstwist (github.com/elceef/dnstwist); DNS answers via Cloudflare DNS over HTTPS (cloudflare-dns.com)",
  "unresolved": 0,
  "variantsGenerated": 66
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.002.

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/domain/typosquat?domain=example.com'

# 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/domain/typosquat?domain=example.com' \
  | 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 $0.002 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.002" });
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 $0.002 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapi.sitecheck-api.workers.dev%2Fapi%2Fdomain%2Ftyposquat
const res = await pay("https://api.sitecheck-api.workers.dev/api/domain/typosquat?domain=example.com");
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 $0.002 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.002"})
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/domain/typosquat?domain=example.com")
    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
4 h agoPassed402135 ms$0.002