What is the difference between the Sandbox and the Test environments?
The SANDBOX environment lets you get familiar with the structure and process of the API, including the request and response. You can run sample transactions in Sandbox using Postman. To promote to Test, you must submit your app to Equifax for review before it becomes available in the Test environment.
The TEST environment enables you to work with test data that meets your specific testing needs.
As applicable, refer to the Legacy API Quick Start Guide or the JSON API Quick Start Guide for details.