Large Payments

{
  "answer": {
    "count_in_window": 17,
    "min_value": "50000",
    "observer_threshold": "50000",
    "payments": [
      {
        "asset": "XRP",
        "asset_kind": "xrp",
        "close_time": "2026-10-18T03:45:02Z",
        "explorer_url": "https://xrpscan.com/tx/CCA2528E8BE7B3C50640BD8CB0A624555D5952DAD51843C0913A904E0FD690E7",
        "from": "rNxp4h8apvRis6mJf9Sh8C6iRxfrDWN7AV",
        "hash": "CCA2528E8BE7B3C50640BD8CB0A624555D5952DAD51843C0913A904E0FD690E7",
        "ledger_confirmation": {
          "delivered": {
            "currency": "XRP",
            "issuer": null,
            "value": "189186.690765"
          },
          "independently_confirmed": true,
          "result": "tesSUCCESS",
          "validated": true
        },
        "ledger_index": 107731381,
        "observed_amount": 189186.69,
        "to": "rDAE53VfMvftPB4ogpWGWvzkQxfht6JPxr"
      }
    ],
    "returned": 2,
    "window_fully_covered": true,
    "window_minutes": 60
  },
  "checked_at": "2026-10-18T03:48:44+00:00",
  "proof": {
    "ledger_index": 107731381,
    "network": "xrpl:0 (mainnet)",
    "sources": [
      {
        "method": "large-payment log",
        "name": "Brük live observer",
        "url": "https://bruk-ledger-api.fly.dev/api/snapshot"
      },
      {
        "method": "tx (independent re-check of each payment)",
        "name": "XRP Ledger public server"
      }
    ],
    "validated": true
  },
  "service": "large_payments",
  "unknowns": [
    "Who owns these addresses (exchanges, funds, individuals). The ledger does not record identity; Brük does not guess."
  ]
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://bruk-agent-api.fly.dev/v1/large-payments?limit=5&minutes=60'

# 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://bruk-agent-api.fly.dev/v1/large-payments?limit=5&minutes=60' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode

// 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%2Fbruk-agent-api.fly.dev%2Fv1%2Flarge-payments
const res = await pay("https://bruk-agent-api.fly.dev/v1/large-payments?limit=5&minutes=60");
console.log(res.status, await res.text());

# 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://bruk-agent-api.fly.dev/v1/large-payments?limit=5&minutes=60")
    print(res.status_code, res.text)