Documentation Range of chatbot's functonality depends on scopes (or in other words, list of API calls chatbot is allowed to use). These can be set in ​https://api.slack.com/ for your app in OAuth & Permissions tab. The *.history call is currently the most important one as it is responsible for collecting history of channels Scopes for .history API call:

• channels.history: collects history only from SLACK public channels
• groups.history: same as with channels, but this one works only for private channels
• im.history: collects chat history from private conversations
• mpim.history: collects chat history from multi-party conversations
• ​https://api.slack.com/methods/conversations.history|conversations.history: universal scope for all 4 API calls mentioned above, it's functionality depends on which of those 4 scopes is chatbot allowed to use. For example: if chatbot is allowed to view groups and channels but not allowed to view private messages and multi-party conversations, those API-calls get rejected automatically without limiting other scopes

List of potentionally useful information that can be obtained with SLACK API calls:

• channels.history:
  • list of all messages, events
  • timestamps of these messages
• users.info:
  • name, real name, team name, e-mail
  • info about user being admin, owner, bot, restriced/ultra-restricted
• channels.info:
  • all members
  • scope of the channel (private, public, mpim..)
  • latest message
  • number of unread messages
  • topic
  • previous names