Sandbox Only

Next.js integration

Create links in a server route and keep secrets off the client.

Build in sandbox. These guides describe the current implementation. Live payments and payouts are disabled; planned capabilities are labelled explicitly.

App Router server route

javascript

// app/api/checkout/route.ts
export async function POST() {
  const response = await fetch(
    'https://api.unalaunch.com/api/v1/integration/checkout-links',
    {
      method: 'POST',
      headers: {
        Authorization: `Bearer ${process.env.UNA_SANDBOX_KEY}`,
        'Content-Type': 'application/json',
      },
      body: JSON.stringify({ productId: process.env.UNA_PRODUCT_ID }),
      cache: 'no-store',
    },
  );
  if (!response.ok) return Response.json({ error: 'Checkout unavailable' }, { status: 502 });
  const { checkoutUrl } = await response.json();
  return Response.json({ checkoutUrl });
}

Server-controlled product selection

Validate a selected product against your own server-side catalog mapping if you accept a browser selection. Do not accept a price or arbitrary redirect URL. Never prefix the API key environment variable with NEXT_PUBLIC_.