ToolVet
63trust / 100

Agent Session Guard

by 402.com.tr in Security & trust

x402 APIFailing, checked 19 min ago

🆕 Pre-execution security audit for autonomous agent session keys (ERC-4337) and delegated signers (EIP-7702). Evaluates time-locks (perpetual leak vs bounded session), per-tx spend caps, router target allowlisting (Uniswap/Aerodrome vs unbounded execution), and produces an actionable GO / OVER_PERMISSIVE / DRAIN_RISK verdict before signing. Pass signer= (session key address).

GET
https://402.com.tr/api/x402/agent-session-guard
Price
$0.03
per call in USDC
Uptime
54.5%
last 30 days
Response time
487 ms
508 ms slowest 5%
Last check
Failed
19 min ago, next in 38 min

Run a free test callHow to call it

Reliability

All checks passedSome failedAll failedNot checked

Latest check failed 19 min ago: Expected HTTP 402, got 404

Status and outage history · Atom feed

How to call it

GET https://402.com.tr/api/x402/agent-session-guard

Each call costs $0.03 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://402.com.tr/api/x402/agent-session-guard?expiryHours=24&signer=0x973a31858f4d2125f48c880542da11a2796f12d6&spendCapUsd=100

Parameters

ParameterTypeRequiredDescription
accountstringNoAgent smart account (optional)
allowedTargetsstringNoComma-separated target contracts (optional)
expiryHoursstringNoSession lifetime hours (optional)
signerstringYesSession key / delegate address
spendCapUsdstringNoSpending limit in USD (optional)

Example response

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

{
  "checkedAt": "2026-10-13T03:01:04.009Z",
  "isPerpetualSession": false,
  "isUncappedSpending": false,
  "isWildcardTarget": true,
  "securityScore": 55,
  "signer": "0x973a31858f4d2125f48c880542da11a2796f12d6",
  "verdict": "OVER_PERMISSIVE"
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.03.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://402.com.tr/api/x402/agent-session-guard?expiryHours=24&signer=0x973a31858f4d2125f48c880542da11a2796f12d6&spendCapUsd=100'

# 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://402.com.tr/api/x402/agent-session-guard?expiryHours=24&signer=0x973a31858f4d2125f48c880542da11a2796f12d6&spendCapUsd=100' \
  | 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 $0.03 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.03" });
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 $0.03 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2F402.com.tr%2Fapi%2Fx402%2Fagent-session-guard
const res = await pay("https://402.com.tr/api/x402/agent-session-guard?expiryHours=24&signer=0x973a31858f4d2125f48c880542da11a2796f12d6&spendCapUsd=100");
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 $0.03 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.03"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://402.com.tr/api/x402/agent-session-guard?expiryHours=24&signer=0x973a31858f4d2125f48c880542da11a2796f12d6&spendCapUsd=100")
    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
19 min agoExpected HTTP 402, got 404404211 ms-
5 h agoExpected HTTP 402, got 404404169 ms-
10 h agoExpected HTTP 402, got 404404231 ms-
14 h agoExpected HTTP 402, got 404404265 ms-
17 h agoExpected HTTP 402, got 404404180 ms-
Show 6 older checks
21 h agoPassed402444 ms$0.03
25 h agoPassed402487 ms$0.03
29 h agoPassed402488 ms$0.03
33 h agoPassed402459 ms$0.03
36 h agoPassed402524 ms$0.03
45 h agoPassed402508 ms$0.03