A lazy Sunday afternoon and my interest was piqued by XML-RPC Client A very basic XML-RPC client wrapped in a Cloud Functions function: main.py: import functions_framework import os import xmlrpc.client endpoint = os.get_env("ENDPOINT") proxy = xmlrpc.client.ServerProxy(endpoint) @functions_framework.http def add(request): print(request) rqst = request.get_json(silent=True) resp = proxy.add( {"x":{ "real":rqst["x"]["real"], "imag":rqst["x"]["imag"] }, "y":{ "real":rqst["y"]["real"], "imag":rqst["y"]["imag"] } }) return resp requirements.txt: functions-framework==3.* Run it: python3 -m venv venv source venv/bin/activate python3 -m pip install --requirement requirements.