How do I monetize a Chrome extension without Stripe?

Sources: Stripe global availability · Lemon Squeezy supported countries · Paddle supported countries (Crimea, Donetsk, Kherson, Luhansk and Zaporizhzhia restricted) · AgentaOS payouts: N. Macedonia, Serbia, Pakistan, Ukraine. "Listed" means the seller-country page includes it; each company still reviews your account.

// extension: popup.js
const API = 'https://api.your-extension.com';

async function authHeaders() {
  const { token } = await chrome.storage.local.get('token'); // from your sign-in
  return { Authorization: `Bearer ${token}` };
}

async function isPaid() {
  const res = await fetch(`${API}/me`, { headers: await authHeaders() });
  return (await res.json()).paid === true;
}

async function upgrade() {
  const res = await fetch(`${API}/upgrade`, { method: 'POST', headers: await authHeaders() });
  const { url } = await res.json();
  chrome.tabs.create({ url }); // AgentaOS checkout opens in a new tab
}

// backend: server.js (Node + Express)
import express from 'express';
import { AgentaOS, WebhookVerificationError } from '@agentaos/pay';

const agentaos = new AgentaOS(process.env.AGENTAOS_API_KEY);
const app = express();

// Webhook first, with the raw body: verification fails on parsed JSON.
app.post('/webhooks', express.raw({ type: 'application/json' }), async (req, res) => {
  let event;
  try {
    event = agentaos.webhooks.verify(
      req.body,
      req.headers['x-agentaos-signature'],
      process.env.AGENTAOS_WEBHOOK_SECRET,
    );
  } catch (err) {
    if (err instanceof WebhookVerificationError) return res.sendStatus(400);
    throw err;
  }
  if (event.type === 'checkout.session.completed') {
    const userId = event.data.metadata.customerId; // metadata.customerId, see the paywall demo
    if (userId) await db.users.update(userId, { paid: true });
  }
  // also handle subscription.updated / subscription.canceled to lock users again
  res.sendStatus(200);
});

app.use(express.json());

app.post('/upgrade', requireUser, async (req, res) => {
  const checkout = await agentaos.checkouts.create({
    linkId: process.env.PRO_PLAN_LINK_ID,
    buyerEmail: req.user.email,
    metadata: { customerId: req.user.id },
    successUrl: 'https://your-extension.com/thanks',
    cancelUrl: 'https://your-extension.com/pricing',
  });
  res.json({ url: checkout.checkoutUrl });
});

app.get('/me', requireUser, async (req, res) => {
  res.json({ paid: (await db.users.get(req.user.id)).paid === true });
});

Rates from AgentaOS pricing docs. The fixed €0.50 weighs more on small prices; a yearly plan pays it once. Try your own numbers in the payout calculator.

Sources: ExtensionPay · ExtensionPay, add Stripe payments to Chrome extensions · Stripe, global availability · Chrome Web Store payments deprecation · Chrome Web Store program policies · Chromium Extensions group thread (Aug 2025) · Lemon Squeezy supported countries · Paddle supported countries · Dodo Payments, monetize a Chrome extension · AgentaOS paywall demo · AgentaOS webhooks · AgentaOS subscriptions · AgentaOS pricing docs · AgentaOS Terms