QMORE Checkout Seamless

QMORE Checkout Seamless

To initiate the payment process with QMORE Checkout Seamless a POST request needs to be sent to: https://api.qenta.com/seamless/frontend/init

For PHP we provide an example code on GitHub.

Process Overview in General

  1. Consumer selects one of the available payment methods offered in the online shop.

  2. Then they enter the payment method-specific payment data or identification data such as credit card number, expiration date, username, password, etc.

  3. Afterwards consumer commits the payment by clicking a relevant button.

  4. Consumer receives relevant information on the result of the payment.

Process Overview for QMORE

When integrating QMORE Checkout Seamless to your online shop you have to perform the following main steps:

  1. Initializing QENTA Data Storage

    1. You have to initialize the QENTA Data Storage by making a server-side call to a specific URL of QMORE Checkout Seamless using parameters.

    2. The result of initialization is a Data Storage which you can use to store sensitive payment method specific data of your consumer on the QMORE Checkout Seamless without having to handle these sensitive data in your online shop or on your web server.

    3. This Data Storage is available for 30 minutes after the last read or write access and after this time has expired, also every time a payment has been started the Data Storage becomes invalid and has to be initialized again.

  2. Storing sensitive payment data in initiated Data Storage

    1. After initializing the Data Storage you receive a URL as a return parameter.

    2. With the URL you’re able to integrate JavaScript functionality of QENTA for storing sensitive payment data which your consumer entered in a web form in your online shop.

    3. These JavaScript functions allow you to bypass the sensitive payment data of your consumer from your online shop and your web server.

    4. These data are directly sent to the QENTA Data Storage without transferring them through your online shop or your web server.

  3. Starting payment process

    1. After the sensitive payment data was stored to the QENTA Data Storage you can start the payment process by making a server-side call of another URL of QMORE Checkout Seamless.

    2. The server-to-server call returns a URL to where you redirect your consumer for executing the payment process and where external pages of financial institutions are displayed.

  4. Handling of result of payment process

    1. When your consumer successfully finished the payment you’ll get a confirmation regarding the result of the payment process.

    2. Based on this result you can redirect your consumer to a success, cancel, error or pending page of your online shop and provide information about the payment result.

Before the purchase is completed you can include the displaying of order overviews, additional consumer-tailored information on discounts and special offers, as well as promotions that are perfectly catered to your consumers' interests and shopping preferences.

Payment Process in Detail

From a technical point of view, the payment process involves the following parties:

  • Consumer

  • Online shop

  • QMORE Checkout Seamless

The payment process is typically composed of the following steps:

  1. First, the consumer clicks the "Checkout" button.

  2. Then the online shop initiates the Data Storage as a server-to-server request.

  3. QMORE Checkout Seamless returns the Data Storage ID and the JavaScript URL.

  4. The online shop displays the input form for entering payment data such as credit card number, expiration date, etc. to the consumer, and/or redirects the consumer to the financial service provider.

  5. Then the consumer enters the required payment data into the input form and the data are sent to QENTA.

  6. QMORE Checkout Seamless stores the payment data on a PCI-compliant server.

  7. The online shop receives and displays the anonymized payment data.

  8. Then the online shop displays the relevant order details to the consumer.

  9. Afterwards the consumer reviews the order details and commits the payment by clicking a relevant button.

  10. The transaction details are sent as server-to-server request to QMORE Checkout Seamless.

  11. QMORE Checkout Seamless redirects the consumer to the external pages of the financial service provider.

  12. The consumer fills in the required payment details into the external pages of the financial service provider.

  13. QMORE Checkout Seamless confirms the transaction to the online shop by sending a server-to-server request.

  14. Now the online shop stores the transaction result.

  15. QMORE Checkout Seamless redirects the consumer to the successUrl, failureUrl, pendingUrl or cancelUrl.

  16. Then, the online shop displays an appropriate page providing the consumer with information on the result of the payment process.

  17. After returning to the online shop the consumer proceeds with browsing or shopping additional items in the shop.


Backend operations for QMORE Checkout Seamless are subdivided into two categories:

Transaction-based operations depend on existing orders and non-transaction-based operations don’t.

Backend operations are an optional feature and to enable it contact our sales team.


During test mode there is communication between your online shop and a test area provided for this purpose by the relevant financial service provider. The payment process is only simulated and no money is transferred.