I’m using my own C# library to make the request, the same library I used with the Twitch API (appart from issue on my side with receiving chunked package it works as expected). But I see in the RFC 0016 it sends the session id as field “id” and not “session_id”. Do you have a complete example of the content sent to the server by the client (like that I could see what I am missing in my library) ?