you can’t directly get all chat data from nodebb with a single api unless you build a plugin or custom route. but nodebb already gives you json endpoints for most data.

for example:

https://yourforum.com/api/recent show recent posts

https://yourforum.com/api/category/%7Bcid%7D show topics in that category

https://yourforum.com/api/topic/%7Btid%7D show full topic with posts

https://yourforum.com/api/user/%7Busername%7D show user info

if you want “all chat” like messages, you’ll need to enable the nodebb-plugin-chat-api or write a small express plugin that uses SocketHelpers.getUserChats() to expose data as /api/chats.

so short answer: use built-in /api/... endpoints for posts/topics, and for private chat you gotta use plugin or custom route.