Axepta offers a sandbox test mode as part of verifying that the integration works correctly.
The sandbox test environment can be found by visiting: https://axepta.sandbox.bnpparibas.pl/
To create a new account, click Create Merchant account, and then provide an email address to which an account activation link will be sent.
After activating the account, simply log in using the generated login and the previously set password.
A test store will be assigned to the account, which will have its own integration keys.
Sandbox URL: https://api.sandbox.axepta.pl