ToolVet
71trust / 100

Watch

by Settled in Security & trust

x402 APIPassing, checked 4 h ago

Watchdog: 30 days of signed webhook alerts for one x402 endpoint. Settled keeps probing it and POSTs an EIP-191-signed JSON alert to your webhook whenever its status, payability, price or payTo changes (checked every 15 minutes), plus one notice at expiry. Body: {url, webhook}. Verify any alert at /v1/verify.

POST
https://settled.tools/v1/watch
Price
$1.00
per call in USDC
Uptime
100%
last 30 days
Response time
808 ms
1.2 s slowest 5%
Last check
Passed
4 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://settled.tools/v1/watch

Each call costs $1.00 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://settled.tools/v1/watch
content-type: application/json

{
  "url": "https://api.example.com/search",
  "webhook": "https://agent.example.com/hooks/settled"
}

Parameters

ParameterTypeRequiredDescription
urlstringYesAbsolute https URL of the x402 endpoint to watch
webhookstringYeshttps URL that receives POSTed alerts

Example response

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

{
  "baseline": {
    "payability": "payable",
    "price_usd": 0.01,
    "status": "live"
  },
  "expires_at": "2026-10-28T00:00:00.000Z",
  "manage": "https://settled.tools/v1/watch/3f9c…",
  "status": "active",
  "url": "https://api.example.com/search",
  "watch_id": "3f9c…"
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $1.

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

# 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://settled.tools/v1/watch' \
  -H 'content-type: application/json' \
  --data-raw '{"url":"https://api.example.com/search","webhook":"https://agent.example.com/hooks/settled"}' \
  | 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 $1 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$1" });
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 $1 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fsettled.tools%2Fv1%2Fwatch&method=POST
const res = await pay("https://settled.tools/v1/watch", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "url": "https://api.example.com/search",
    "webhook": "https://agent.example.com/hooks/settled"
  }),
});
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 $1 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$1"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://settled.tools/v1/watch",
        json={
            "url": "https://api.example.com/search",
            "webhook": "https://agent.example.com/hooks/settled",
        },
    )
    print(res.status_code, res.text)

Security scan

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Recent checks

WhenResultHTTPTimePrice
4 h agoPassed40264 ms$1.00
8 h agoPassed402717 ms$1.00
13 h agoPassed402581 ms$1.00
17 h agoPassed402770 ms$1.00
22 h agoPassed402664 ms$1.00
Show 10 older checks
26 h agoPassed4021.1 s$1.00
30 h agoPassed4021.2 s$1.00
34 h agoPassed402943 ms$1.00
38 h agoPassed402184 ms$1.00
43 h agoPassed402808 ms$1.00
47 h agoPassed4021.2 s$1.00
2 days agoPassed402909 ms$1.00
2 days agoPassed4021.2 s$1.00
2 days agoPassed402943 ms$1.00
3 days agoPassed402843 ms$1.00