Appian (https://appian.com) makes it easy to build solutions for complex business problems.
We are working on an Appian connected system for Docmosis, but until then you can use Create from scratch (HTTP only) to create a HTTP integration with Docmosis.
Here is a link to the relevant Appian documentation:
You can find details of the /render service in the Docmosis Web Services Guide, or use our Code Samples for ideas on how to structure the call.
Please contact Support and for help or for a status update on the connected system.