Payment Verify

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://apexfaucet.xyz/api/x402/payment-verify?chain=base&hash=0x95df26d28dd63416be98aa5285f97ffa031024e09e3ea3a606e0a280330d7c93&min=0.05&to=0x024b82335C29Fa5606a8ea5c1D24FC9eAD50700C&token=0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913'

# 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/payment-verify?chain=base&hash=0x95df26d28dd63416be98aa5285f97ffa031024e09e3ea3a606e0a280330d7c93&min=0.05&to=0x024b82335C29Fa5606a8ea5c1D24FC9eAD50700C&token=0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913' \
  | 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%2Fpayment-verify
const res = await pay("https://apexfaucet.xyz/api/x402/payment-verify?chain=base&hash=0x95df26d28dd63416be98aa5285f97ffa031024e09e3ea3a606e0a280330d7c93&min=0.05&to=0x024b82335C29Fa5606a8ea5c1D24FC9eAD50700C&token=0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913");
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/payment-verify?chain=base&hash=0x95df26d28dd63416be98aa5285f97ffa031024e09e3ea3a606e0a280330d7c93&min=0.05&to=0x024b82335C29Fa5606a8ea5c1D24FC9eAD50700C&token=0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913")
    print(res.status_code, res.text)