> ## Documentation Index
> Fetch the complete documentation index at: https://docs.sprintcheckout.com/llms.txt
> Use this file to discover all available pages before exploring further.

# API integration

> Introduction to get paid via direct API integration

<Tip>
  Go to [API integration > Quickstart](/api-reference/sessions/quickstart) for an overview and detail API reference information.
</Tip>

## Features

### Static & dynamic amount

If you want the user to be able to modify the payemnt amount, you can do so. Just select "editable" amount. In this case you might want to set up a minimum amount as well.

### One off & permanent payment links

You can create payment links that experire when user sucessfully pays them. Or you can create payment links that can have multiple payments. This is useful for donation type of payment links.

### Cancel and Successful redirects

### Update payment sessions