What does the baseUrl represent in a Marketing Cloud integration?

• A. The endpoint used for authentication
• B. The base URL for your application; Journey Builder loads assets relative to this endpoint
• C. The data export endpoint
• D. The UI path for the custom activity

Answer: (B)

BaseUrl is the root address of the external application you connect with Marketing Cloud. For Journey Builder custom activities, you host the activity’s UI and its server endpoints at a publicly accessible URL, and Marketing Cloud uses this base URL to load the UI assets and to call the activity’s endpoints. In practice, if your app is at https://myapp.example.com, that becomes the baseUrl, and Journey Builder will fetch UI resources and send requests to paths relative to that root (for example, resources under https://myapp.example.com and API calls like https://myapp.example.com/api/…). This isn’t specifically an authentication endpoint or a data export endpoint, and the UI path is simply a resource under the base URL rather than the base URL itself.