XpressDox publishes an API for those users who would like to harness the power of document automation within their apps. See the API documentation here.
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XpressDox Docussembly™ document automation can be customised by a developer using one of three APIs (Application Programming Interfaces). This article describes the APIs and why any one of them would be chosen above the others.
Sometimes document drafting and assembly will form only a part of your application, and now you can access all the power of XpressDox Docussembly™ inside your application by using the XpressDox API. There’s no need for you to create your own document assembly logic when it has all been done for you.