Store as MNEMOPAY_API_KEY. Anyone with this key can charge against your account.

# 1. Install
npm install @mnemopay/sdk

# 2. Charge 49¢
import MnemoPay from "@mnemopay/sdk";
const agent = MnemoPay.quick("my-agent", {
  apiKey: process.env.MNEMOPAY_API_KEY
});
const tx = await agent.charge(0.49, "first charge");
await agent.settle(tx.id);