> For the complete documentation index, see [llms.txt](https://debitllama.gitbook.io/debitllama/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://debitllama.gitbook.io/debitllama/accepting-payments/checkout-redirect.md).

# Checkout Redirect

#### Configuring debit items

When creating a new debit item that defines the parameters of the checkout and the subscription, you need to add a redirect url. This parameter is the only parameter you are allowed to alter after creating your item. It must point to a valid link on your website where you wish to redirect to.

<figure><img src="/files/TZ2B0RhPq9PetTeSJAYN" alt=""><figcaption><p>This is the form you need to fill out when creating an item</p></figcaption></figure>

The URL configured here will redirect the user after they have successfully created a subscription payment intent with their account and ready to start making payments.

The website will redirect using this schema:

```typescript
${redirectUrl}?paymentIntent=${paymentIntent}`
```

Where the redirect url is a valid url you have supplied, and the paymentIntent query parameter is a parameter used to identify the payment intent.

{% hint style="info" %}
The paymentIntent variable is a poseidon hash used with the zero-knowledge proof cryptography. It identifies individual zkSnarks created with the same account and nullifies them after they have been processed. \
\
All cryptography is handled by Debitllama and you just need to use this variable as an identifier. It will let you query the API and also the blockchain.
{% endhint %}

#### How to use?

Use this variable to fetch details about the subscription status using the payment\_intents endpoints. Learn more about how to use them here:

{% content-ref url="/pages/fmvGMsYsiynKkZHGruYW" %}
[/api/v1/payment\_intents/\[slug\]](/debitllama/rest-api-v1/api-v1-payment_intents-slug.md)
{% endcontent-ref %}

For fixed priced subscriptions by default you don't need to do anything. After the payment intent has been created the payments will be processed automatically. \
\
For dynamic priced subscriptions you will need to trigger a payment request on the front-end or via the API. For this you will need to use the paymentIntent as an identifier.

{% hint style="success" %}
Learn about how to create access tokens on the next page, before you start using the API!
{% endhint %}


---

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