A checkout session is a page for one order. You open one from the Checkout page, from the API (POST /api/v1/checkout/sessions) or with the Pay with Stratos button on your website.
What the customer sees
The amount, your business's name and the ways to pay that fit the currency. When the payment is done they return to the address you gave, with the session and its status in the address.
How long a session lasts
A session that is not paid expires after a day. You can also expire one yourself.
Promo codes
If you run promo codes, the checkout shows a box for one, and the amount shown is what is left to pay.
Updated 06 Nov 2026
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