ToolVet
75trust / 100

Check

by agent-seller-preflight.iykykblog.workers.dev in Onchain & crypto

x402 APIPassing, checked 3 h ago

Pre-payment honesty screen for any x402 endpoint. Run BEFORE paying: probes the target URL unpaid, parses its 402 challenge, cross-checks price against its /.well-known/x402 manifest and the CDP Bazaar listing, and sanity-checks the payTo wallet on-chain. Returns reachable, challenge validity, price, payTo, Bazaar match, risk flags, and a 0-100 honesty score. Public data only; no bulk dataset.

POST
https://agent-seller-preflight.iykykblog.workers.dev/check
Price
$0.03
per call in USDC
Uptime
100%
last 30 days
Response time
495 ms
768 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

POST https://agent-seller-preflight.iykykblog.workers.dev/check

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.

POST https://agent-seller-preflight.iykykblog.workers.dev/check
content-type: application/json

{
  "url": "https://agent-sec-lookup.iykykblog.workers.dev/lookup"
}

Parameters

ParameterTypeRequiredDescription
urlstringYesFull URL of the paid x402 endpoint to screen (e.g. https://api.example.com/lookup)

Example response

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

{
  "challenge_valid": true,
  "honesty_score": 95,
  "matches_bazaar_listing": true,
  "network": "eip155:8453",
  "payTo": "0x329b4b66AFBC407bb3a22DAEb465487c6FAa08C1",
  "price_usdc": 0.005,
  "reachable": true,
  "risk_flags": [],
  "url": "https://agent-sec-lookup.iykykblog.workers.dev/lookup"
}

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 -X POST 'https://agent-seller-preflight.iykykblog.workers.dev/check' \
  -H 'content-type: application/json' \
  --data-raw '{"url":"https://agent-sec-lookup.iykykblog.workers.dev/lookup"}'

# 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://agent-seller-preflight.iykykblog.workers.dev/check' \
  -H 'content-type: application/json' \
  --data-raw '{"url":"https://agent-sec-lookup.iykykblog.workers.dev/lookup"}' \
  | 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%2Fagent-seller-preflight.iykykblog.workers.dev%2Fcheck&method=POST
const res = await pay("https://agent-seller-preflight.iykykblog.workers.dev/check", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "url": "https://agent-sec-lookup.iykykblog.workers.dev/lookup"
  }),
});
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.post(
        "https://agent-seller-preflight.iykykblog.workers.dev/check",
        json={
            "url": "https://agent-sec-lookup.iykykblog.workers.dev/lookup",
        },
    )
    print(res.status_code, res.text)

Security scan

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Recent checks

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3 h agoPassed402543 ms$0.03
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