Sandbox
Use the sandbox environment to build and test your integration without affecting live data. Sandbox requests return predefined responses when you use the test values documented for Verification and Discovery. Sandbox webhook event names use thesandbox. prefix, such as sandbox.verification.updated. See Webhook Events for available events.
Production
Use the production environment for requests involving live patient and insurance data. Replace your sandbox credentials with production credentials when your integration is ready for live traffic. Production webhook event names do not use thesandbox. prefix.
Resources are associated with the environment in which they are created. Use credentials for the same environment when retrieving a resource.