ToolVet
78trust / 100

Decode

by Signature Decoder in Onchain & crypto

x402 APIPassing, checked 3 h ago

Decode an off-chain SIGNATURE REQUEST before you sign it: EIP-712 typed data (eth_signTypedData_v4) or a plain personal_sign string. Turns the opaque request into a human-readable summary plus security risk flags for the drainer patterns wallets miss - gasless unlimited token approvals (EIP-2612 Permit, DAI permit, Uniswap Permit2) and asset-transferring marketplace orders (Seaport). Keyless, deterministic, zero network.

GET https://sign.cyberwarex.com/decode

Last 30 days

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Status and outage history · Atom feed

Uptime
100%
Response time
302 ms typical, 420 ms slowest 5%
Last check
3 h ago
Next check
any minute now

How to call it

GET https://sign.cyberwarex.com/decode

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://sign.cyberwarex.com/decode

Parameters

ParameterTypeRequiredDescription
messagestringNoA plain personal_sign string (use instead of typed_data).
typed_dataobject or stringNoEIP-712 typed data (object or JSON string) as passed to eth_signTypedData_v4: types, domain, primaryType, message.

Example response

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

{
  "disclaimer": "Deterministic, keyless decode of a signature request only. This is not financial advice and not a guarantee: it reads the request you were given, it cannot know the intent of the site that produced it. Never sign a request you do not understand.",
  "domain": {
    "chainId": 1,
    "name": "USD Coin",
    "verifyingContract": "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48",
    "version": "2"
  },
  "kind": "typed_data",
  "primaryType": "Permit",
  "risk": {
    "flags": [
      {
        "code": "unlimited_token_approval_via_permit",
        "detail": "spender gets an effectively unlimited allowance of USD Coin.",
        "severity": "danger"
      }
    ],
    "level": "danger"
  },
  "summary": "Gasless UNLIMITED token approval (EIP-2612 permit) of USD Coin to spender 0x1111..."
}

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://sign.cyberwarex.com/decode'

# 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://sign.cyberwarex.com/decode' \
  | 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%2Fsign.cyberwarex.com%2Fdecode
const res = await pay("https://sign.cyberwarex.com/decode");
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://sign.cyberwarex.com/decode")
    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

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3 h agoPassed402310 ms$0.002
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