The Chinese Wikipedia recently has deployed a gadget written by me which sends requests to /page/summary API of other wikis. During development I found that adding Api-User-Agent causes the request to be non-simple and the browser will send a additional CORS preflight request, adding latency. My gadget is sensitive to latency so I want to avoid this additional request.

I'm writing to ask: (1) Is not adding Api-User-Agent for the reason above a violation of the policy? (2) Is there a way to provide user agent information without causing this additional request?