ToolVet
18trust / 100

Agent Intel X402 Endpoint Health Vetting

by SiteCheck Agent Intel & Dev in Security & trust

x402 APIFailing, checked 5 h ago

Checks an x402 (HTTP 402 payment) endpoint before you pay: one unpaid GET, then the HTTP status, whether a 402 challenge with an accepts list is present, the payment networks, asset, price and pay-to address format, CORS header and response time. Does not pay, does not verify the seller's identity or reputation, and gives one sample, not uptime.

GET
https://api.fadeandco.workers.dev/api/agent-intel/x402-endpoint-health-vetting
Price
$0.001
per call in USDC
Uptime
0.0%
last 30 days
Response time
-
no timed checks yet
Last check
Failed
5 h ago, next any minute now

Run a free test callHow to call it

Reliability

All checks passedSome failedAll failedNot checked

Latest check failed 5 h ago: Amount "0.002" is not in atomic token units

Status and outage history · Atom feed · Watch with other listings

How to call it

GET https://api.fadeandco.workers.dev/api/agent-intel/x402-endpoint-health-vetting

Each call costs $0.001 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://api.fadeandco.workers.dev/api/agent-intel/x402-endpoint-health-vetting?url=https%3A%2F%2Fhttpbin.org%2Fstatus%2F402

Parameters

ParameterTypeRequiredDescription
urlstringYesPublic https:// endpoint address

Example response

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

{
  "acceptsCount": 0,
  "checkedAt": "2026-10-23T09:35:20.497Z",
  "corsAllowOrigin": "*",
  "first": null,
  "httpStatus": 402,
  "networks": [],
  "note": "One unpaid request. Says nothing about uptime, seller identity or reputation.",
  "responseMs": 816,
  "source": "https://httpbin.org/status/402",
  "url": "https://httpbin.org/status/402",
  "verdict": "402_WITHOUT_X402_ACCEPTS"
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.001.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://api.fadeandco.workers.dev/api/agent-intel/x402-endpoint-health-vetting?url=https%3A%2F%2Fhttpbin.org%2Fstatus%2F402'

# 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://api.fadeandco.workers.dev/api/agent-intel/x402-endpoint-health-vetting?url=https%3A%2F%2Fhttpbin.org%2Fstatus%2F402' \
  | 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 $0.001 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.001" });
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 $0.001 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapi.fadeandco.workers.dev%2Fapi%2Fagent-intel%2Fx402-endpoint-health-vetting
const res = await pay("https://api.fadeandco.workers.dev/api/agent-intel/x402-endpoint-health-vetting?url=https%3A%2F%2Fhttpbin.org%2Fstatus%2F402");
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 $0.001 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.001"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://api.fadeandco.workers.dev/api/agent-intel/x402-endpoint-health-vetting?url=https%3A%2F%2Fhttpbin.org%2Fstatus%2F402")
    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
5 h agoAmount "0.002" is not in atomic token units40264 ms$0.002
13 h agoAmount "0.002" is not in atomic token units402984 ms$0.002
21 h agoAmount "0.002" is not in atomic token units402505 ms$0.002
30 h agoAmount "0.002" is not in atomic token units40292 ms$0.002
38 h agoAmount "0.002" is not in atomic token units40228 ms$0.002
Show 10 older checks
46 h agoAmount "0.002" is not in atomic token units402118 ms$0.002
2 days agoAmount "0.002" is not in atomic token units4021.0 s$0.002
3 days agoAmount "0.002" is not in atomic token units40257 ms$0.002
3 days agoAmount "0.002" is not in atomic token units40229 ms$0.002
3 days agoAmount "0.002" is not in atomic token units40252 ms$0.002
3 days agoAmount "0.002" is not in atomic token units402116 ms$0.002
4 days agoAmount "0.002" is not in atomic token units40244 ms$0.002
4 days agoAmount "0.001" is not in atomic token units402102 ms$0.001
4 days agoAmount "0.001" is not in atomic token units402125 ms$0.001
5 days agoAmount "0.001" is not in atomic token units40231 ms$0.001