Hi @JJPL , glad to see you in this community and welcome.

In my experience, if you have separate staging and development (local) environments, you may want to create separate Klaviyo accounts.  You can designate it as a “Test Account” and you’ll see a nice label to remind you that you’re working in a Test Account.

See here:

You can read more about setting up Test Accounts here:

• Create a Test Account

In the Test Account, you can also generate some “fake events and profiles” for testing purposes so that you don’t send emails or tests to real subscribers or recipients.  There’s a built-in feature to let you generate some of the most common ecommerce event data, you can follow the documentation here and see the list of events:

• Generate sample data

However, if you have your own custom metrics or events, you may have to create your own bootstrapping mock data using the standard Klaviyo APIs or the SFTP Bulk Import tool.

Hope that helps!