Skubana offers an open RESTful API that allows integration with your own system. Using the API, you should be able to feed inventory details from your system to Skubana, and vice-versa. The API documentation can be found here.
If you do not have the development resources required to use the API, an alternative is to import your inventory from your own system to Skubana using our Excel in-house inventory import template, which you can download from here. For more details, see Importing Inventory.