ToolVet
78trust / 100

Diagnose

by Ned Watch in Developer tools

x402 APIPassing, checked 1 h ago

Why is this host failing right now? One call, no account: Ned probes it (DNS at three resolvers, its nameservers, TCP, TLS, HTTP timings, CDN and hosting fingerprints, cache and static splits, domain registration) and returns a diagnosis an agent can act on: findings and their strength, what was ruled out, and a ready runbook prompt. Page text never leaves Ned.

POST
https://api.ned.watch/v1/diagnose
Price
$0.05
per call in USDC
Uptime
100%
last 30 days
Response time
251 ms
357 ms slowest 5%
Last check
Passed
1 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

How to call it

POST https://api.ned.watch/v1/diagnose

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://api.ned.watch/v1/diagnose
content-type: application/json

{
  "target": "api.example.com",
  "type": "http"
}

Parameters

ParameterTypeRequiredDescription
targetstringYesa host or https URL
typestringNo One of: http, mcp.

Example response

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

{
  "diagnosis": {
    "findings": [
      {
        "family": "cdn",
        "id": "cf_522",
        "strength": "observed",
        "title": "Cloudflare 522: origin connection timed out"
      }
    ],
    "prompt": "example.com is unreachable through Cloudflare (522). Check in order: the origin server process, the firewall allowing Cloudflare's address ranges, server load.",
    "ruled_out": [
      "DNS",
      "TLS certificate",
      "Ned's own network"
    ],
    "summary": "Cloudflare answered 522: it could not open a connection to your origin within 15 s."
  },
  "host": "example.com",
  "node": "watch-us",
  "the_watch": {
    "since": "2026-10-08T03:41:00+00:00",
    "state": "down"
  }
}

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://api.ned.watch/v1/diagnose' \
  -H 'content-type: application/json' \
  --data-raw '{"target":"api.example.com","type":"http"}'

# 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://api.ned.watch/v1/diagnose' \
  -H 'content-type: application/json' \
  --data-raw '{"target":"api.example.com","type":"http"}' \
  | 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%2Fapi.ned.watch%2Fv1%2Fdiagnose&method=POST
const res = await pay("https://api.ned.watch/v1/diagnose", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "target": "api.example.com",
    "type": "http"
  }),
});
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://api.ned.watch/v1/diagnose",
        json={
            "target": "api.example.com",
            "type": "http",
        },
    )
    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
1 h agoPassed402276 ms$0.05
6 h agoPassed402267 ms$0.05
10 h agoPassed402266 ms$0.05
14 h agoPassed402290 ms$0.05
18 h agoPassed402270 ms$0.05
Show 10 older checks
22 h agoPassed402251 ms$0.05
26 h agoPassed402222 ms$0.05
30 h agoPassed402347 ms$0.05
34 h agoPassed402201 ms$0.05
38 h agoPassed402256 ms$0.05
42 h agoPassed402328 ms$0.05
46 h agoPassed402357 ms$0.05
2 days agoPassed402241 ms$0.05
2 days agoPassed402250 ms$0.05
2 days agoPassed402251 ms$0.05