Linkcheck

{
  "finalDestination": "https://github.com/",
  "homoglyphFlag": false,
  "punycodeFlag": false,
  "reasons": [
    "Host has 9667 URLs listed in URLhaus, but this exact URL is not listed and the domain is on no blocklist. Large shared hosts get listed one URL at a time, so this is not treated as a risk signal."
  ],
  "redirectChainLength": 0,
  "threatFeed": {
    "dateAdded": "2026-10-17 05:34:06 UTC",
    "exactUrlMatch": false,
    "found": true,
    "hostBlacklists": {
      "spamhaus_dbl": "not listed",
      "surbl": "not listed"
    },
    "hostUrlCount": 9667,
    "queried": "github.com",
    "reference": "https://urlhaus.abuse.ch/url/3951152/",
    "source": "urlhaus",
    "status": "offline",
    "tags": [
      "IRAHook"
    ]
  },
  "url": "https://github.com/anthropics/claude-code",
  "verdict": "safe"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://tariffmonkee.com/paid/linkcheck?url=https%3A%2F%2Fgithub.com%2Fanthropics%2Fclaude-code'

# 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://tariffmonkee.com/paid/linkcheck?url=https%3A%2F%2Fgithub.com%2Fanthropics%2Fclaude-code' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode

// 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 $0.005 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.005" });
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 $0.005 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Ftariffmonkee.com%2Fpaid%2Flinkcheck
const res = await pay("https://tariffmonkee.com/paid/linkcheck?url=https%3A%2F%2Fgithub.com%2Fanthropics%2Fclaude-code");
console.log(res.status, await res.text());

# 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 $0.005 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.005"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://tariffmonkee.com/paid/linkcheck?url=https%3A%2F%2Fgithub.com%2Fanthropics%2Fclaude-code")
    print(res.status_code, res.text)