ToolVet
71trust / 100

X402 Trust

by xhagents.xyz in Onchain & crypto

x402 APIPassing, checked 56 min ago

Check an x402 endpoint before paying it. Give it any x402 URL: it makes the unpaid request, decodes the 402 challenge, reads the origin's .well-known/x402 and openapi.json, inspects the payTo address on-chain (USDC inflows, distinct senders, EOA vs contract vs smart-wallet delegation), and returns a 0-100 trust score with buy/watch/avoid plus the evidence and the penalties behind every point ...

POST
https://xhagents.xyz/api/x402-trust
Price
$0.05
per call in USDC
Uptime
100%
last 30 days
Response time
1.4 s
2.6 s slowest 5%
Last check
Passed
56 min 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

How to call it

POST https://xhagents.xyz/api/x402-trust

Each call costs $0.05 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://xhagents.xyz/api/x402-trust
content-type: application/json

{
  "method": "POST",
  "url": "https://xhagents.xyz/api/kb/ask"
}

Parameters

ParameterTypeRequiredDescription
bodyobjectNoJSON body the agent would send
deepbooleanNoAlso inspect payTo on-chain (default true)
methodstringNoHTTP method the agent will use (default POST)
urlstringYesThe x402 endpoint an agent is about to pay

Example response

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

Example response, 27 lines
{
  "findings": [
    "402 returned without payment",
    "14 USDC inflows from 5 senders on record"
  ],
  "not_checked": [
    "does the seller deliver after payment",
    "uptime over time",
    "operator identity"
  ],
  "payto_inspection": {
    "distinct_senders": 5,
    "kind": "eoa",
    "usdc_transfers_seen": 14
  },
  "points": {
    "challenge": 20,
    "discovery": 15,
    "gate": 25,
    "payto": 21,
    "price": 10,
    "replay": 5
  },
  "score": 93,
  "url": "https://xhagents.xyz/api/kb/ask",
  "verdict": "pay"
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.05.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://xhagents.xyz/api/x402-trust' \
  -H 'content-type: application/json' \
  --data-raw '{"method":"POST","url":"https://xhagents.xyz/api/kb/ask"}'

# 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://xhagents.xyz/api/x402-trust' \
  -H 'content-type: application/json' \
  --data-raw '{"method":"POST","url":"https://xhagents.xyz/api/kb/ask"}' \
  | 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 $0.05 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.05" });
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 $0.05 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fxhagents.xyz%2Fapi%2Fx402-trust&method=POST
const res = await pay("https://xhagents.xyz/api/x402-trust", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "method": "POST",
    "url": "https://xhagents.xyz/api/kb/ask"
  }),
});
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 $0.05 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.05"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://xhagents.xyz/api/x402-trust",
        json={
            "method": "POST",
            "url": "https://xhagents.xyz/api/kb/ask",
        },
    )
    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
56 min agoPassed402821 ms$0.05
5 h agoPassed402734 ms$0.05
9 h agoPassed4021.2 s$0.05
14 h agoPassed4023.0 s$0.05
18 h agoPassed4021.4 s$0.05
Show 10 older checks
22 h agoPassed4021.1 s$0.05
26 h agoPassed4022.1 s$0.05
30 h agoPassed4022.6 s$0.05
34 h agoPassed4021.6 s$0.05
38 h agoPassed4021.9 s$0.05
42 h agoPassed4022.4 s$0.05
46 h agoPassed4021.7 s$0.05
2 days agoPassed4021.3 s$0.05
2 days agoPassed4021.5 s$0.05
2 days agoPassed4021.4 s$0.05