Below is minimal Python code which creates a server that converts XHTML to docx. This server utilised Flask, and can handle multiple requests in parallel. I can easily implement according to your requirement regarding comments and tags if you provide some further information on what it is you are looking for:
from flask import Flask, request, jsonify
import markdown2
from docx import Document
import html2text
app = Flask(__name__)
@[login to view URL]('/convert', methods=['POST'])
def convert():
xhtml = [login to view URL]['xhtml']
# convert xhtml to markdown
markdown = [login to view URL](xhtml)
# convert markdown to docx
doc = markdown2.markdown_path(markdown,extras=["metadata"])
[login to view URL]('[login to view URL]')
return jsonify({'status': 'success'})
if __name__ == '__main__':
[login to view URL](threaded=True)