Accept Qubic payments anywhere.

One link, generated once — it never expires or needs reconfiguring.

Pay-what-you-want, with an optional minimum if you need one.

Perfect for a livestream overlay, a link in your bio, or a thank-you page.

Same link every time — nothing to regenerate after each tip.

Build a catalog once, then tap through a cart at checkout.

Just a screen and a wallet — no terminal rental, no card reader.

Upload a whole catalog by CSV, or build it product by product.

The same register works for a pop-up table or a full storefront.

Meter any endpoint or article per call, with the x402 protocol.

It works identically for a human browser or an AI agent.

No API keys to provision — just pay, then fetch.

One middleware function gates any route you choose.

Load up a balance once, then draw down per request — no repeated chain waits.

A trade-signal or dividend feed charging 500 QU a call — a customer loads 10,000 QU once, then draws down automatically.

Every call is a signed voucher, verified instantly — no chain wait, no double-spend.

Ideal for high-frequency traffic, AI agents, or any pay-as-you-go API.

One payment unlocks a full article, ebook, or page — not just a single API call.

A single payment grants access — perfect for an article, an ebook, or a research report.

Minutes, hours, or days — the access window is entirely your call.

No repeated checkout screens on every page — signed, scoped, and expires exactly when it should.

Sign in with your Qubic wallet — no password, no signup form.

MetaMask, WalletConnect, a private seed, or a vault file.

Your keys never touch our servers — you're always in control.

Sign a challenge, and you're in — that's the whole flow.

See revenue trends and customer activity the moment you log in.

Revenue, refunds, and net — the exact figures your books need.

Accountant-ready exports, whenever you need them.

Not a black box — every figure traces back to a real invoice.

Already running WooCommerce or Shopify? Q+Pay drops right in.

A real payment gateway plugin, and a Shopify custom-app bridge.

Customer checks out, pays with Qubic, and the order marks itself paid.

Both plugins run on the exact same invoice API as everything else.

Get notified the instant a payment lands — however you want to hear it.

Webhooks are HMAC-signed, with automatic retries if your server hiccups.

Wire it into your fulfillment system, or simply get an email receipt.

Best-effort delivery — a failed notification never un-pays the invoice.

The dashboard speaks seven languages, switchable any time.

English, Spanish, French, German, Portuguese, Japanese, and Chinese.

Eight display currencies, so pricing always reads naturally.

Built for a storefront that sells well beyond one country.

A clean, branded checkout page — and a receipt for every payment.

Show the price, scan to pay, confirm — no redirect, no separate gateway.

Customers can view, print, or revisit their receipt any time at useqpay.com.

Add your logo and colors — it's your checkout, just powered by Q+Pay.

Every paid invoice gets a real, detailed receipt — automatically.

Order, item, amount, and the transaction that proves it — real, not a summary.

Invoices, tip jars, storefront sales — every paid transaction gets one.

Save it, print it, or log in with your wallet at useqpay.com to see every receipt.

A one-shot checkout link for a specific order — no page to build.

POST /invoice
{
  "usdAmount": "9.99",
  "orderId": "ORDER-42",
  "description": "1x Widget"
}

{
  "invoiceId": "a18b2c…",
  "checkoutUrl": "https://…",
  "quAmount": "29412"
}

Send the customer to checkoutUrl — USD in, QU out, nothing else to build.

A stable, reusable link that never runs out.

POST /tipjar
{
  "description": "Buy me a coffee",
  "minUsdAmount": "1.00"
}

Embed the returned url as a button anywhere — it never needs regenerating.

Manage tip jars point-and-click from the Tip Jars tab instead.

For agents and scripts on the paying side — a fetch() that pays for itself.

const fetch402 = createX402Fetch({
  payer: seedPayer({ seed }),
  maxAmountPerCall: 2000,
  maxTotalSpend: 50000,
});
await fetch402(url);

Reads the 402, pays, resubmits — your agent never sees a wallet prompt.

Works with any x402-paywalled endpoint, not just Q+Pay's own.

Deposit once, then authorize each call with an instant, signed voucher.

const ch = createChannelFetch({ payer, baseUrl });
await ch.open(50000);        // one deposit
await ch.fetch(articleUrl); // instant
await ch.fetch(articleUrl); // instant

Each call is a locally-signed voucher — no per-call transaction.

Built for agents and scripts making many calls in a short window.

Invoice and tip jar payments POST to your webhookUrl with a signature.

const expected = crypto
  .createHmac("sha256", secret)
  .update(rawBody).digest("hex");
timingSafeEqual(sig, expected);

The same header carries the signature on every delivery.

3 attempts with backoff if your server hiccups — never un-pays the invoice.

Platform plugins that call the same invoice API — no separate integration to learn.

wp-content/plugins/
  qpay-for-woocommerce/
    qpay-for-woocommerce.php

→ activate, paste your API key

Shopify gets its own app for your store - request it from your dashboard.

The same invoice.paid webhook the API uses closes out the order automatically.