In the test (playground) environment, you can test the integration of the following products in your online store:

• Klarna payments lets you offer Klarna as a payment method to your customers.
• Klarna checkout lets you offer Klarna’s checkout module in your online store.

Before you start testing the Klarna products, consider the following:

• Our live (production) systems don't process the purchases completed in the playground environment. These test purchases won't result in invoices or fees.
• Don’t use real personal data during testing. Depending on which country your store operates in, we offer sample customer data and sample payment data that you can use.
• In the playground environment, you can test all Klarna products. The products you see in production may differ from the ones available in the playground environment, depending on your contract.

See what Klarna products look like when added to your store’s checkout or payment process.

When testing your store's integration with Klarna, you can:

• Test the payment process if you offer Klarna payment methods in your checkout. See the product documentation and the Payments API reference reference to learn more.
• Test the complete checkout as seen by your customers with Klarna checkout. See product documentation and the Checkout API reference to learn more.
• Manage test orders in the playground Merchant portal.

Additionally, On-site messaging and Express button each have a testing solution that lets you apply Klarna's branded elements to your playground store. See the product documentation for On-site messaging and Express button to learn more about how to test them before going live.

We recommend that you perform some end-to-end tests before you launch. Take a look at the step-by-step test cases.

If you integrate using third-party platforms, see the platform integrations documentation.

To experience what buying with Klarna is like for your customers, go to our Demo store. The demo store is an example website that shows what the shopping journey can look like to the customers and how Klarna payments, Klarna checkout, On-site messaging, and Express button work.

The data in the Demo store is not linked to your MID. The orders you create using Klarna APIs or in the plaground Merchant portal are not visible in the Demo store.

To start testing Klarna products, you need:

• Access to the test Merchant portal
• Test API keys for the Payments and Checkout APIs
• Client identifiers to configure and test On-site messaging and Express checkout solutions
• Sample customer data and sample payment data

To access the test Merchant portal, you can sign up to create a new test account or log in with a test existing account. 

To create a new test account, follow these steps:

1. Click the Log in button in the navigation bar of Klarna Docs.
2. Select the region of your credentials (for example, 🇪🇺 Europe).
3. Select Playground as the environment.
4. Click Sign up.
5. Type your email address and click SIGN-UP. You'll get a confirmation email at this address.
6. Open the confirmation email and click Activate account.
7. Finish setting up your account:
   a. Accept the Terms & Conditions.
   b. Choose a new password.
   c. Enter your name.
8. Log in to the Merchant portal.

To log in with an existing test account, follow these steps:

1. Go to the Merchant portal login page.
2. Type your email address and password, then click Log In.
   
   If you don’t have these credentials, see the Create a new test account section. If you forgot your password, use the reset function.

To test your Klarna API integration, you need a set of test credentials. Follow these steps to get the credentials:

1. Access the test Merchant portal.
2. Click Payment settings in the left sidebar.
3. Select Klarna API Keys
4. Click the Generate new Klarna API key button.
5. Download the .txt file and close the dialog box. 

You now have a Key ID (API Username) and a Secret (API password) to authenticate when testing the APIs. Note that the test keys will only work for requests you send to the playground API URLs.

In the playground environment, you must never use any real-life data to test the integration. When you're asked to enter data when testing, please use the sample customer data we've prepared.

To test the payment methods, use the sample payment data.

While we hope that your testing experience goes well, there might be times when you get a strange or unexpected response to an API call.

You can troubleshoot with the help of Logs in the Merchant portal.

Logs contain the details about your playground store’s operations from the previous 7 days. You can filter the entries based on date and time, service, order ID, direction, and more. Each entry is accompanied by details that help you get to the bottom of each issue.

If you need help understanding the logs or have any questions about the testing process, contact Merchant support.