Pulse

{
  "answer": {
    "base_fee_drops": 10,
    "brük_rolling": {
      "agrees_with_direct_read": true,
      "avg_seconds_per_ledger": 3.85,
      "avg_transactions_per_ledger": 89.2,
      "from_ledger": 107731318,
      "ledgers_behind_direct_read": 0,
      "ledgers_observed": 120,
      "to_ledger": 107731437,
      "validators_quorum": 35
    },
    "close_time": "2026-10-18T03:48:40+00:00",
    "ledger_hash": "6B7BBB99931A4EA94F33701330703B2AEC7EA90A915BE8A98253B6658BA89275",
    "ledger_index": 107731437,
    "load_factor": 1,
    "network_status": "healthy",
    "open_ledger_fee_drops": 10,
    "payments_in_ledger": 2,
    "seconds_since_close": 2.1,
    "transactions_in_ledger": 54
  },
  "checked_at": "2026-10-18T03:48:42+00:00",
  "proof": {
    "ledger_index": 107731437,
    "network": "xrpl:0 (mainnet)",
    "sources": [
      {
        "method": "ledger (validated)",
        "name": "XRP Ledger public server",
        "url": "https://s1.ripple.com:51234/"
      },
      {
        "method": "fee",
        "name": "XRP Ledger public server",
        "url": "https://s1.ripple.com:51234/"
      },
      {
        "method": "rolling ledger history",
        "name": "Brük live observer",
        "url": "https://bruk-ledger-api.fly.dev/api/snapshot"
      }
    ],
    "validated": true
  },
  "service": "ledger_pulse",
  "unknowns": []
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://bruk-agent-api.fly.dev/v1/pulse'

# 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/pulse' \
  | 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 $0.001 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.001" });
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 $0.001 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fbruk-agent-api.fly.dev%2Fv1%2Fpulse
const res = await pay("https://bruk-agent-api.fly.dev/v1/pulse");
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 $0.001 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.001"})
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/pulse")
    print(res.status_code, res.text)