API Tester allows customers to send requests to both Merge's APIs and third-party APIs.

Mock Sandbox is a Linked Account with sample data so customers can see normalized responses based upon API support for a given third-party platform.

Merge API Tester enables customers to send test GET requests to Merge’s APIs or the APIs of supported third-party platforms.

Under the You → Merge section, you can make requests to the Merge API for a given Linked Account.

Under the Merge → Third party section, you can make requests to the third-party platform for a given Linked Account.

Mock Sandbox is a Linked Account with sample data. Since sandboxes and free trial accounts aren't always accessible for each third party, Merge now provides sample data based on the underlying third-parties API support for customers to test before they go live in production!