The accepted versions and documentation may differ between each environment.
This environment uses a fake database of shops. Use this environment to test and implement your implementation. You can't break anything here and you can simulate fake payments when placing orders.
When we make API changes, this server gets the latest new updates first. So new versions are available here before they are on the production server. Old versions are deprecated here before the same happens on the production environment.
Only use this environment for tested and production use implementations. Never use this environment for testing. Some API versions might not be available yet on the production environment.