# Fulfillment with Self-Checkout

SQUAKE offers a self-checkout page that allows your customers to purchase carbon compensations directly using SQUAKE integration with Stripe.

The whole checkout process is similar to the [API integration](/use-cases/fulfillment-with-api.md), but instead of making a purchase request to the SQUAKE API, you redirect your customers to the SQUAKE checkout page. So **make sure you are familiar with** the [API integration](/use-cases/fulfillment-with-api.md) before proceeding.

## Steps to proceed with the self-checkout process

* \[optional] register a webhook to receive notifications about your customers' purchase-related events (see [Webhooks](/use-cases/webhooks.md))
* \[optional] calculate emissions using SQUAKE's API (see [Emission Calculation](/use-cases/fulfillment-with-api.md#emission-calculation))
* pick a carbon product provided by SQUAKE (see [Define a product to use for emission compensation](/use-cases/fulfillment-with-api.md#define-a-product-to-use-for-emission-compensation))
* quote pricing for the carbon emissions you want to compensate using SQUAKE's API (see [Pricing](/use-cases/fulfillment-with-api.md#pricing))
* pricing endpoint returns a URL to the SQUAKE checkout page
* redirect your customer to the SQUAKE checkout page
* your customer settles the payment themselves on the SQUAKE checkout page
* SQUAKE settles the payment and sends a webhook notification to your webhook endpoint (if you registered one)

## Notes:

* You can use `/calculate_with_pricing` endpoint to combine emission calculation and pricing in a single request.
* Both the `/calculate_with_pricing` and `/pricing` endpoints accept the `payment_link_return_url` and `locale` parameters so you can adjust the checkout experience for your customers (see the API reference for more information)
* We're generating a `payment_link_url` only for the purchases below 250 EUR. For purchases above 250 EUR, you need to request an invoice from SQUAKE.


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