Approvals

{
  "approvals": [
    {
      "amount": "unlimited",
      "approvedAt": "2025-03-01T10:00:00.000Z",
      "codes": [
        {
          "code": "UNLIMITED_APPROVAL",
          "severity": "orange"
        }
      ],
      "revoke": true,
      "severity": "orange",
      "spender": {
        "address": "0x1111111254eeb25477b68fb85ed929f73a960582",
        "contract": true,
        "name": "AggregationRouterV5",
        "trusted": false
      },
      "token": {
        "address": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
        "name": "USD Coin",
        "symbol": "USDC"
      },
      "unlimited": true
    }
  ],
  "grade": "CAUTION",
  "one_liner": "CAUTION: 3 approvals, 1 unlimited; revoke 1",
  "reasons": [
    {
      "code": "UNLIMITED_APPROVAL",
      "details": {
        "count": 1,
        "spenders": [
          "0x1111111254eeb25477b68fb85ed929f73a960582"
        ]
      },
      "severity": "orange"
    },
    {
      "code": "STALE_APPROVAL",
      "details": {
        "count": 2,
        "spenders": [
          "0x000000000022d473030f116ddee9f6b43ac78ba3"
        ]
      },
      "severity": "info"
    }
  ],
  "revokeUrl": "https://revoke.cash/address/0x...?chainId=8453",
  "summary": {
    "approvals": 3,
    "toRevoke": 1,
    "tokens": 2,
    "unlimited": 1
  },
  "verdict": "orange"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://presign-guard.onrender.com/v1/approvals?address=0x28c6c06298d514db089934071355e5743bf21d60&chain=ethereum'

# 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://presign-guard.onrender.com/v1/approvals?address=0x28c6c06298d514db089934071355e5743bf21d60&chain=ethereum' \
  | 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 $0.02 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.02" });
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 $0.02 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fpresign-guard.onrender.com%2Fv1%2Fapprovals
const res = await pay("https://presign-guard.onrender.com/v1/approvals?address=0x28c6c06298d514db089934071355e5743bf21d60&chain=ethereum");
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 $0.02 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.02"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://presign-guard.onrender.com/v1/approvals?address=0x28c6c06298d514db089934071355e5743bf21d60&chain=ethereum")
    print(res.status_code, res.text)