There is an undocumented endpoint that gets recent chat messages https://tmi.twitch.tv/api/rooms/CHANNEL_ID/recent_messages but as with all undocumented endpoints expect this to change/break at any time.
There is an undocumented endpoint that gets recent chat messages https://tmi.twitch.tv/api/rooms/CHANNEL_ID/recent_messages but as with all undocumented endpoints expect this to change/break at any time.