Production environment is the one that should be used on your production application. Its base URL is:
Sandbox environment is the recommended way to test your integration with the Tint API, either on your development or staging environment (but not in production).
Your sandbox API key would be provided by the Tint team. It is different from your production one.
The API is strictly the same as the production one. By default, external data sources are mocked to prevent any unwanted expense.
If you have any doubt or question about the sandbox environment, reach out to us!