We just published an extension to the Templates/Info endpoint:

https://api.reporting.cloud/v1/templates/info

The endpoint returns information about the template including merge fields and merge blocks. Now, it returns additionally customer user defined document properties. In MS Word, these properties can be found in the Advanced Properties dialog in the file info backstage menu:

The response value is described in the following table:

The returned JSON looks like in the following sample. The new properties can be found in the userDocumentProperties property:

{
   "templateName":"sample_docx.docx",
   "mergeBlocks":[

   ],
   "mergeFields":[

   ],
   "userDocumentProperties":{
      "custom_entry2":"entry2_value",
      "custom_entry1":"entry1_value"
   }
}

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