I've been trying to see through the API but i was not very successful.
However in your Backend seems to accept JSON from your own Webapp, when creating a dispatch for example.
What i wanted to achieve is to integrate the dispatch API with a google sheet and use google apps script in order to make it very easy for endusers to trigger a dispatch. Since all data is present in google sheets it would be very easy to read out, send the info as json to your server, therefore creating a dispatch.
By listening to the XHR requests made on the web-frontend is posting JSON to your backend, which then creates the dispatch. This is easy to listen to and the format is therefore very clear and makes is incredibly easy to use this as a template for future dispatches.
I'd love to see support for the JSON format and i think it should be somewhat easy to port your current API to the public.
All the best