ToolVet
75trust / 100

Toolfit Watch

by ToolFit by YourAITools in Email & messaging

x402 APIPassing, checked 2 h ago

MCP server monitoring API (24h checks, 30 days). Register a public remote MCP server URL and an https webhook: ToolFit re-audits the server every 24 hours for 30 days and POSTs an HMAC-SHA256 signed JSON notification when its tools/list fingerprint (pin) or grade changes, or it becomes unreachable or recovers. Returns watch_id, the signing secret (shown once) and the baseline. Unreachable URLs, blocked URLs or webhooks and a full watch list are never charged.

POST
https://api.youraitools.co/toolfit/v1/watch
Price
$0.25
per call in USDC
Uptime
100%
last 30 days
Response time
376 ms
3.4 s 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

POST https://api.youraitools.co/toolfit/v1/watch

Each call costs $0.25 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.

POST https://api.youraitools.co/toolfit/v1/watch
content-type: application/json

{
  "url": "https://api.youraitools.co/mcp/hub",
  "webhook": "https://example.com/hooks/toolfit"
}

Parameters

ParameterTypeRequiredDescription
everystringNoOptional; this route is the 24 h interval (POST /v1/watch/6h for every 6 h). One of: 24h.
urlstringYesPublic remote MCP server URL (Streamable HTTP, https), e.g. https://api.youraitools.co/mcp/hub. ToolFit only lists its tools.
webhookstringYesYour https endpoint (public host, port 443) that receives the signed JSON change notifications. A query string is allowed.

Example response

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

{
  "baseline": {
    "grade": "B",
    "pin": "ts_0123456789abcdef0123456789abcdef",
    "score": 85,
    "tools": 36
  },
  "every": "24h",
  "expires_at": "2026-11-23T17:00:00.000Z",
  "secret": "whsec_<64 hex, shown once>",
  "status_url": "https://api.youraitools.co/toolfit/v1/watch/w_0123456789abcdef01234567",
  "watch_id": "w_0123456789abcdef01234567"
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.25.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://api.youraitools.co/toolfit/v1/watch' \
  -H 'content-type: application/json' \
  --data-raw '{"url":"https://api.youraitools.co/mcp/hub","webhook":"https://example.com/hooks/toolfit"}'

# 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.youraitools.co/toolfit/v1/watch' \
  -H 'content-type: application/json' \
  --data-raw '{"url":"https://api.youraitools.co/mcp/hub","webhook":"https://example.com/hooks/toolfit"}' \
  | 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 $0.25 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.25" });
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 $0.25 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapi.youraitools.co%2Ftoolfit%2Fv1%2Fwatch&method=POST
const res = await pay("https://api.youraitools.co/toolfit/v1/watch", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "url": "https://api.youraitools.co/mcp/hub",
    "webhook": "https://example.com/hooks/toolfit"
  }),
});
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 $0.25 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.25"})
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.youraitools.co/toolfit/v1/watch",
        json={
            "url": "https://api.youraitools.co/mcp/hub",
            "webhook": "https://example.com/hooks/toolfit",
        },
    )
    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 agoPassed402446 ms$0.25
9 h agoPassed402266 ms$0.25
17 h agoPassed402273 ms$0.25
25 h agoPassed402210 ms$0.25
32 h agoPassed402535 ms$0.25
Show 9 older checks
40 h agoPassed4023.4 s$0.25
47 h agoPassed402160 ms$0.25
2 days agoPassed402455 ms$0.25
3 days agoPassed402468 ms$0.25
3 days agoPassed402376 ms$0.25
3 days agoPassed402204 ms$0.25
3 days agoPassed402197 ms$0.25
4 days agoPassed402412 ms$0.25
4 days agoPassed402474 ms$0.25