Invoice Total Agency

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://market.datapackvibe.com/x402/invoice-total-agency' \
  -H 'content-type: application/json' \
  --data-raw '{"items":[{"quantity":2,"unit_price":12.5},{"quantity":1,"unit_price":8}],"tax_rate_percent":0}'

# 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://market.datapackvibe.com/x402/invoice-total-agency' \
  -H 'content-type: application/json' \
  --data-raw '{"items":[{"quantity":2,"unit_price":12.5},{"quantity":1,"unit_price":8}],"tax_rate_percent":0}' \
  | 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 $0.01 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.01" });
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 $0.01 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fmarket.datapackvibe.com%2Fx402%2Finvoice-total-agency&method=POST
const res = await pay("https://market.datapackvibe.com/x402/invoice-total-agency", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "items": [
      {
        "quantity": 2,
        "unit_price": 12.5
      },
      {
        "quantity": 1,
        "unit_price": 8
      }
    ],
    "tax_rate_percent": 0
  }),
});
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 $0.01 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.01"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://market.datapackvibe.com/x402/invoice-total-agency",
        json={
            "items": [
                {
                    "quantity": 2,
                    "unit_price": 12.5,
                },
                {
                    "quantity": 1,
                    "unit_price": 8,
                },
            ],
            "tax_rate_percent": 0,
        },
    )
    print(res.status_code, res.text)