ToolVet
80trust / 100

Base Approvals

by Base Token Approval Check in Onchain & crypto

x402 APIPassing, checked 3 h ago

Check a Base wallet's ERC-20 approvals: allowances for 8 major tokens (USDC, WETH, USDbC, DAI...) to common spenders (Permit2, Uniswap Universal Router, Uniswap SwapRouter02, Aerodrome Router...); flags unlimited approvals.

GET
https://automaton-tx-explainer.vercel.app/v1/base/approvals
Price
$0.005
per call in USDC
Uptime
100%
last 30 days
Response time
238 ms
399 ms slowest 5%
Last check
Passed
3 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://automaton-tx-explainer.vercel.app/v1/base/approvals

Each call costs $0.005 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://automaton-tx-explainer.vercel.app/v1/base/approvals?address=0x679af3a893eDd0AeF4ac4c7776Ba581b238C0717

Parameters

ParameterTypeRequiredDescription
addressstringYesBase wallet address (owner)

Example response

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

{
  "checkedPairs": 64,
  "nonZeroApprovals": [
    {
      "allowance": "unlimited",
      "spender": "Permit2",
      "token": "USDC",
      "unlimited": true
    }
  ],
  "owner": "0x...",
  "unlimitedCount": 1
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.005.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://automaton-tx-explainer.vercel.app/v1/base/approvals?address=0x679af3a893eDd0AeF4ac4c7776Ba581b238C0717'

# 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://automaton-tx-explainer.vercel.app/v1/base/approvals?address=0x679af3a893eDd0AeF4ac4c7776Ba581b238C0717' \
  | 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 $0.005 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%2Fautomaton-tx-explainer.vercel.app%2Fv1%2Fbase%2Fapprovals
const res = await pay("https://automaton-tx-explainer.vercel.app/v1/base/approvals?address=0x679af3a893eDd0AeF4ac4c7776Ba581b238C0717");
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 $0.005 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://automaton-tx-explainer.vercel.app/v1/base/approvals?address=0x679af3a893eDd0AeF4ac4c7776Ba581b238C0717")
    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 agoPassed402246 ms$0.005
7 h agoPassed402236 ms$0.005
11 h agoPassed402399 ms$0.005
16 h agoPassed402308 ms$0.005
20 h agoPassed402288 ms$0.005
Show 10 older checks
24 h agoPassed402238 ms$0.005
28 h agoPassed402198 ms$0.005
33 h agoPassed402203 ms$0.005
37 h agoPassed402210 ms$0.005
41 h agoPassed402251 ms$0.005
44 h agoPassed402221 ms$0.005
2 days agoPassed402243 ms$0.005
2 days agoPassed402194 ms$0.005
2 days agoPassed402251 ms$0.005
3 days agoPassed402263 ms$0.005