Checkout embed - Join Markt Docs

Use embeds when the buyer starts on your marketing site but should still check out through Join Markt.

Pattern

Host a product CTA on the external page
Either link out to the storefront product URL, or start a cart via the embed / start-checkout API
Finish on /checkout/[invoiceId] (platform host)

Storefront iframe (simple)

<iframe
  src="https://{subdomain}.joinmarkt.com/products/{product-slug}"
  title="Join Markt product"
  style="width:100%;min-height:720px;border:0;border-radius:12px;"
  loading="lazy"
  allow="payment *"
></iframe>

Some payment methods refuse framed contexts. Prefer a full-page redirect to checkout for highest conversion.

Recommended: button → storefront → checkout

<a
  class="buy-button"
  href="https://{subdomain}.joinmarkt.com/products/{product-slug}"
>
  Purchase
</a>

This avoids iframe payment restrictions and keeps theme + anti-fraud intact.

Programmatic start

If you build a custom client, call your approved embed / storefront checkout endpoints from the Join Markt origin (CORS and CSRF rules apply). Never put secret API keys in browser code — use buyer session or a short-lived start token issued by your backend.