Arc Send Guard

{
  "data": {
    "chain": "Arc mainnet (5042)",
    "destination": {
      "isContract": false,
      "isToken": false,
      "knownCounterparty": false,
      "symbol": null,
      "transactionsSent": 0,
      "usdcBalance": 0
    },
    "from": "0x6cf1329447dbfeae5ff2b922b693eb9518c3c9…",
    "historyWindow": {
      "fromBlock": 25030820,
      "note": "the last 100,000 blocks, about 3 days",
      "toBlock": 25130820
    },
    "method": "stop = do not send; check = look again; …",
    "ok": true,
    "reasons": [
      {
        "code": "fresh",
        "level": "check",
        "text": "this address has never sent a transactio…"
      }
    ],
    "to": "0x024b820fe19d85a4558ac38cac83ac23107070…",
    "token": null,
    "verdict": "stop"
  },
  "ok": true,
  "paid": 0.001
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://apexfaucet.xyz/api/x402/arc-send-guard?from=0x6cf1329447dbfeae5ff2b922b693eb9518c3c9a0&to=0x024b820fe19d85a4558ac38cac83ac231070700c'

# 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://apexfaucet.xyz/api/x402/arc-send-guard?from=0x6cf1329447dbfeae5ff2b922b693eb9518c3c9a0&to=0x024b820fe19d85a4558ac38cac83ac231070700c' \
  | 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%2Fapexfaucet.xyz%2Fapi%2Fx402%2Farc-send-guard
const res = await pay("https://apexfaucet.xyz/api/x402/arc-send-guard?from=0x6cf1329447dbfeae5ff2b922b693eb9518c3c9a0&to=0x024b820fe19d85a4558ac38cac83ac231070700c");
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://apexfaucet.xyz/api/x402/arc-send-guard?from=0x6cf1329447dbfeae5ff2b922b693eb9518c3c9a0&to=0x024b820fe19d85a4558ac38cac83ac231070700c")
    print(res.status_code, res.text)