To get access to use Sandbox API keys you have to complete registration process and have to be registered in our Partner System.
Where can I find Sandbox API keys?
1. Log in to the Montonio partner system
2. From the left-hand menu, select "Stores" to view a list of stores.
3. Click on the name of the store you want to integrate with:
4. The store info will pop up on the right side of the screen -> scroll down and click on "Go to API keys":
5. Scroll down to find Sandbox API keys for testing
NOTE! Sandbox and LIVE API keys are for two different environments
Related article - How to Find API Keys for Integration
If you have additional questions and need our help, feel free to contact our support team or via the chat in the bottom right corner.