@FocusMicroSystems

Using a DocuSign sandbox (developer) environment for development while maintaining your production account for live operations is both possible and highly recommended for the flexibility it provides without affecting your production limits. Using the integration key in the sandbox environment won’t affect your production customers, as the sandbox environment is separate from production.

You don’t have to convert it back. The same integration key works in both Demo and Prod.  You just have to make sure your end points and credential are set up correctly.  You can test it in Postman.

@FocusMicroSystems,
 

Using the same integration key for development purposes in the Developer Sandbox environment is possible. The sandbox is designed for testing and development. i’d recommend using it to build and test your integration, so it wont affect your live production environment.

As long as you are using the sandbox environment (which is separate from your production environment), it will not have any impact on your customers who are using the production version of the integration.

Differentiate between sandbox and production environments in your code to avoid sending test data to production systems.
Article for different endpoints:

https://developers.docusign.com/platform/api-endpoint-base-paths/

I’d like to clarify that the sandbox will not automatically sync with your live environment. Please ensure everything is properly tested and then applied to production once you're ready.

Please let me know if you have any questions.

Best,

DEV/API Team