ToolVet
13trust / 100

Payment Watch

by bruk-agent-api.fly.dev in Other

x402 APIFailing, checked 2 h ago

Payment arrival alert: watches an XRP Ledger address for up to 24 hours and POSTs a signed webhook when a matching payment is final (validated, tesSUCCESS, delivered amount checked), or a watch.expired event if none arrives. Payments that land during restarts are still caught. Useful when waiting on an incoming payment without polling.

POST
https://bruk-agent-api.fly.dev/v1/payment-watch
Price
$0.05
per call in USDC
Uptime
0.0%
last 30 days
Response time
-
no timed checks yet
Last check
Failed
2 h ago, next any minute now

Run a free test callHow to call it

Reliability

All checks passedSome failedAll failedNot checked

Latest check failed 2 h ago: Amount "0.05" is not in atomic token units

Status and outage history · Atom feed · Watch with other listings

How to call it

POST https://bruk-agent-api.fly.dev/v1/payment-watch

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://bruk-agent-api.fly.dev/v1/payment-watch
content-type: application/json

{
  "address": "r36sbDCAsaCj44ZUXWY2jjGE1jBpsCoRQ4",
  "currency": "XRP",
  "hours": 1,
  "webhook": "https://example.com/bruk-webhook"
}

Parameters

ParameterTypeRequiredDescription
addressstringYesReceiving r-address to watch.
currencystringNoXRP (default), RLUSD, or a token code.
destination_tagintegerNoOnly match this destination tag.
hoursintegerNoWatch window in hours. Default 24.
issuerstringNoToken issuer r-address. RLUSD defaults to Ripple's issuer.
min_amountstringNoOnly match payments delivering at least this amount.
networkstringNoXRP Ledger network. Default mainnet. One of: mainnet, testnet.
webhookstringYesPublic https URL that receives POSTed JSON events.

Example response

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

Example response, 32 lines
{
  "answer": {
    "events": [
      "watch.created",
      "payment.final",
      "watch.expired"
    ],
    "expires_at": "2026-10-18T05:00:00+00:00",
    "signature_header": "X-Bruk-Signature: sha256=<HMAC-SHA256(webhook_secret, raw body)>",
    "starts_from_ledger": 107731400,
    "status": "active",
    "watch_id": "w_3F9C2A7B51D04E6E",
    "watching": {
      "address": "r36sbDCAsaCj44ZUXWY2jjGE1jBpsCoRQ4",
      "currency": "XRP",
      "destination_tag": null,
      "issuer": null,
      "min_amount": null,
      "network": "mainnet"
    },
    "webhook_secret": "(32-byte hex secret for HMAC-SHA256 signature checks)",
    "webhook_test": {
      "delivered": true,
      "status_code": 200
    }
  },
  "checked_at": "2026-10-18T04:00:00+00:00",
  "service": "payment_watch",
  "unknowns": [
    "Webhook delivery depends on the receiving server being reachable."
  ]
}

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://bruk-agent-api.fly.dev/v1/payment-watch' \
  -H 'content-type: application/json' \
  --data-raw '{"address":"r36sbDCAsaCj44ZUXWY2jjGE1jBpsCoRQ4","currency":"XRP","hours":1,"webhook":"https://example.com/bruk-webhook"}'

# 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://bruk-agent-api.fly.dev/v1/payment-watch' \
  -H 'content-type: application/json' \
  --data-raw '{"address":"r36sbDCAsaCj44ZUXWY2jjGE1jBpsCoRQ4","currency":"XRP","hours":1,"webhook":"https://example.com/bruk-webhook"}' \
  | 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%2Fbruk-agent-api.fly.dev%2Fv1%2Fpayment-watch&method=POST
const res = await pay("https://bruk-agent-api.fly.dev/v1/payment-watch", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "address": "r36sbDCAsaCj44ZUXWY2jjGE1jBpsCoRQ4",
    "currency": "XRP",
    "hours": 1,
    "webhook": "https://example.com/bruk-webhook"
  }),
});
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://bruk-agent-api.fly.dev/v1/payment-watch",
        json={
            "address": "r36sbDCAsaCj44ZUXWY2jjGE1jBpsCoRQ4",
            "currency": "XRP",
            "hours": 1,
            "webhook": "https://example.com/bruk-webhook",
        },
    )
    print(res.status_code, res.text)

Security scan

No findings

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Recent checks

WhenResultHTTPTimePrice
2 h agoAmount "0.05" is not in atomic token units402167 ms$0.05
7 h agoAmount "0.05" is not in atomic token units402280 ms$0.05
11 h agoAmount "0.05" is not in atomic token units402482 ms$0.05