ToolVet
80trust / 100

X402fix Check

by x402fix by AgentGate in Onchain & crypto

x402 APIPassing, checked 2 h ago

Full x402 endpoint check API with paste-ready fixes. Full x402 endpoint check with paste-ready fixes: everything in lite plus a facilitator validate verdict and Bazaar index status, /openapi.json and /.well-known/x402 consistency, payee checks (EVM code, Solana USDC token account, CounterpartyCheck screening) and a generated, self-validated extensions.bazaar block, multichain accepts (Base, Polygon, Arbitrum One, Solana) and code snippet.

GET
https://api.youraitools.co/x402fix/v1/check
Price
$0.02
per call in USDC
Uptime
100%
last 30 days
Response time
48 ms
223 ms slowest 5%
Last check
Passed
2 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://api.youraitools.co/x402fix/v1/check

Each call costs $0.02 in USDC on Polygon, 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.youraitools.co/x402fix/v1/check?url=https%3A%2F%2Fapi.youraitools.co%2Fcounterpartycheck%2Fv1%2Flite

Parameters

ParameterTypeRequiredDescription
frameworkstringNoServer framework for the generated snippet (check tier, default hono) One of: hono, express, next.
methodstringNoMethod your paid route uses (default: from its Bazaar declaration, else GET) One of: GET, POST.
urlstringYesFull https URL of the paid x402 route (site tier: the origin or API base URL)

Example response

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

Example response, 32 lines
{
  "cdp": {
    "failed": [],
    "indexed": true,
    "last_crawled_at": "2026-10-22T16:29:39.916Z",
    "valid": true
  },
  "fixes": [],
  "generated": {
    "bazaar_self_valid": true,
    "note": "Paste-ready: the bazaar block validates against its own schema."
  },
  "grade": "A",
  "method": "GET",
  "score": 100,
  "status": "pass",
  "summary": "A (100/100): x402 v2+v1, Base, Polygon, Arbitrum One, Solana. No problems found.",
  "tier": "check",
  "url": "https://api.youraitools.co/counterpartycheck/v1/lite",
  "x402": {
    "bazaar": true,
    "networks": [
      "Base",
      "Polygon",
      "Arbitrum One",
      "Solana"
    ],
    "price_usd": 0.005,
    "v1": true,
    "v2": true
  }
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.02.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://api.youraitools.co/x402fix/v1/check?url=https%3A%2F%2Fapi.youraitools.co%2Fcounterpartycheck%2Fv1%2Flite'

# 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.youraitools.co/x402fix/v1/check?url=https%3A%2F%2Fapi.youraitools.co%2Fcounterpartycheck%2Fv1%2Flite' \
  | 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 $0.02 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.02" });
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 $0.02 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapi.youraitools.co%2Fx402fix%2Fv1%2Fcheck
const res = await pay("https://api.youraitools.co/x402fix/v1/check?url=https%3A%2F%2Fapi.youraitools.co%2Fcounterpartycheck%2Fv1%2Flite");
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 $0.02 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.02"})
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.youraitools.co/x402fix/v1/check?url=https%3A%2F%2Fapi.youraitools.co%2Fcounterpartycheck%2Fv1%2Flite")
    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
2 h agoPassed40263 ms$0.02
10 h agoPassed402223 ms$0.02
17 h agoPassed40220 ms$0.02
25 h agoPassed40236 ms$0.02
33 h agoPassed40249 ms$0.02
Show 9 older checks
40 h agoPassed402114 ms$0.02
2 days agoPassed40276 ms$0.02
2 days agoPassed40264 ms$0.02
3 days agoPassed40247 ms$0.02
3 days agoPassed40229 ms$0.02
3 days agoPassed40219 ms$0.02
3 days agoPassed40216 ms$0.02
4 days agoPassed40248 ms$0.02
4 days agoPassed402151 ms$0.02