> For the complete documentation index, see [llms.txt](https://developer.convergegate.com/legacy/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developer.convergegate.com/legacy/apm-checkout-blik.md).

# APM Checkout (Blik)

- [Overview](https://developer.convergegate.com/legacy/apm-checkout-blik/overview.md)
- [Process Flow](https://developer.convergegate.com/legacy/apm-checkout-blik/overview/process-flow.md)
- [Testing](https://developer.convergegate.com/legacy/apm-checkout-blik/overview/testing.md)
- [Errors](https://developer.convergegate.com/legacy/apm-checkout-blik/errors.md)
- [Error object](https://developer.convergegate.com/legacy/apm-checkout-blik/errors/error-object.md)
- [Errors type list](https://developer.convergegate.com/legacy/apm-checkout-blik/errors/errors-type-list.md)
- [Decline errors code list](https://developer.convergegate.com/legacy/apm-checkout-blik/errors/decline-errors-code-list.md)
- [Create a checkout session](https://developer.convergegate.com/legacy/apm-checkout-blik/create-a-checkout-session.md)
- [Retrieve a Checkout Session](https://developer.convergegate.com/legacy/apm-checkout-blik/retrieve-a-checkout-session.md): Retrieves the details of an existing checkout session. You need only supply the unique checkout session identifier that was returned upon creation.
- [Webhoook Event Notification](https://developer.convergegate.com/legacy/apm-checkout-blik/webhoook-event-notification.md)
- [Pay a Checkout Session](https://developer.convergegate.com/legacy/apm-checkout-blik/pay-a-checkout-session.md)