Are you developing an integration with the Office for the web (Office Online Server and Office 365) and got stuck? Do you search for expert knowledge about the specifics of the MS-WOPI protocol?
You can either choose to sponsor my project on GitHub and get some complimentary consultation hours or contact me directly if you have a special request.
If you're not ready to sponsor me, you can always try your luck on Stack Overflow. If your inquiry is related to the WopiHost project, submit it directly in the repo's discussions. I try to be as helpful as I can.