Has the 'http://tmi.twitch.tv/group/user/channel_name/chatters' endpoint been removed?

[BarryCarlyon]

Legacy Chatters endpoint shutdown details and timeline - April 2023

Today we are announcing the timeline to decommission the legacy Chatters endpoint that some developers may be using for their Twitch integrations to retrieve a list of users present in a channel’s stream chat. While this endpoint has never been documented or supported, we are communicating this change to limit disruption to third-party applications and the creators that rely on your innovation. As promised in the September announcement for the official Chatters API endpoint, here are the details…

TLDR: it’s in the middle of the 24hour phased shutdown window
With full removal on the 3rd of april