ToolVet
78trust / 100

Chain Drain Check

by Tanod chainpeek in Onchain & crypto

x402 APIPassing, checked 3 h ago

chainpeek (Tanod) wallet drain check: were tokens pulled out in transactions the wallet did not send? Verdict, nonce and evidence, on Base or Ethereum. Use when a wallet's token balance dropped and an agent must know whether it sent the tokens or someone pulled them.

POST https://tanod.dev/v1/chain/drain-check

Last 30 days

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Status and outage history · Atom feed

Uptime
100%
Response time
276 ms typical, 276 ms slowest 5%
Last check
3 h ago
Next check
any minute now

How to call it

POST https://tanod.dev/v1/chain/drain-check

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.

POST https://tanod.dev/v1/chain/drain-check
content-type: application/json

{
  "chain": "base",
  "wallet": "0x5A0b54D5dc17e0AadC383d2db43B0a0D3E029c4c"
}

Parameters

ParameterTypeRequiredDescription
chainstringYesbase or ethereum (the chains with built-in USDC and USDT here). One of: base, ethereum.
lookback_blocksintegerNoLatest blocks read (1-2,000; default 2,000, about 67 minutes on Base and 6.7 hours on Ethereum). Default: 2000.
tokensarray of string or nullNo1 to 5 tokens: USDC, USDT or contract addresses. Default: USDC and USDT. Default: null.
walletstringYesThe wallet to check (0x + 40 hex).

Example response

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

Example response, 43 lines
{
  "chain": "base",
  "counts": {
    "authorized": 1,
    "pulled": 1,
    "sent": 0,
    "wallet_code": 0
  },
  "history": {
    "blocks": 2000,
    "complete": true,
    "from_block": 52510001,
    "to_block": 52512000
  },
  "limits": [
    "Only the listed tokens over the…"
  ],
  "nonce": {
    "end": 70,
    "moved": false,
    "start": 70,
    "start_block": 52510000
  },
  "reasons": [],
  "risk": "high",
  "rpc_calls": 9,
  "rules": {
    "authorized": "tx.from is someone else, but th…",
    "pulled": "tx.from is someone else and non…",
    "sent": "tx.from is the wallet: its key…",
    "wallet_code": "tx.from is someone else and tx.…"
  },
  "tokens": [],
  "transfers": [],
  "transfers_total": 2,
  "verdict": "drained",
  "wallet": "0x5A0b54D5dc17e0AadC383d2db43B0…",
  "wallet_code": {
    "code_size": 0,
    "kind": "none",
    "read": true
  }
}

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 -X POST 'https://tanod.dev/v1/chain/drain-check' \
  -H 'content-type: application/json' \
  --data-raw '{"chain":"base","wallet":"0x5A0b54D5dc17e0AadC383d2db43B0a0D3E029c4c"}'

# 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 - -X POST 'https://tanod.dev/v1/chain/drain-check' \
  -H 'content-type: application/json' \
  --data-raw '{"chain":"base","wallet":"0x5A0b54D5dc17e0AadC383d2db43B0a0D3E029c4c"}' \
  | 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%2Ftanod.dev%2Fv1%2Fchain%2Fdrain-check&method=POST
const res = await pay("https://tanod.dev/v1/chain/drain-check", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "chain": "base",
    "wallet": "0x5A0b54D5dc17e0AadC383d2db43B0a0D3E029c4c"
  }),
});
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.post(
        "https://tanod.dev/v1/chain/drain-check",
        json={
            "chain": "base",
            "wallet": "0x5A0b54D5dc17e0AadC383d2db43B0a0D3E029c4c",
        },
    )
    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 agoPassed402276 ms$0.002
7 h agoPassed402282 ms$0.002
16 h agoPassed402269 ms$0.002