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lita-slack is an adapter for Lita that allows you to use the robot with Slack. The current adapter is not compatible with pre-1.0.0 versions, as it now uses Slack's Real Time Messaging API.


Add lita-slack to your Lita instance's Gemfile:

gem "lita-slack"


Required attributes

Optional attributes

Note: When using lita-slack, the adapter will overwrite the bot's name and mention name with the values set on the server, so and config.robot.mention_name will have no effect.


Each Slack user has a unique ID that never changes even if their real name or username changes. To populate the config.robot.admins attribute, you'll need to use these IDs for each user you want to mark as an administrator. If you're using Lita version 4.1 or greater, you can get a user's ID by sending Lita the command users find NICKNAME_OF_USER.


Lita.configure do |config|
  config.robot.adapter = :slack
  config.robot.admins = ["U012A3BCD"]
  config.adapters.slack.token = "abcd-1234567890-hWYd21AmMH2UHAkx29vb5c1Y"

Joining rooms

Lita will join your default channel after initial setup. To have it join additional channels or private groups, simply invite it to them via your Slack client as you would any normal user.


  • :connected - When the robot has connected to Slack. No payload.
  • :disconnected - When the robot has disconnected from Slack. No payload.
  • :slack_user_created - When the robot creates/updates a user's info - name, mention name, etc., as directed by Slack. The payload has a single object, a Lita::Slack::Adapters::SlackUser object, under the :slack_user key.
  • :slack_channel_created - When the robot creates/updates a channel's or group's info, as directed by Slack. The payload has a single object, a Lita::Slack::Adapters::SlackChannel object, under the :slack_channel key.

Chat service API

lita-slack supports Lita 4.6's chat service API for Slack-specific functionality. You can access this API object by calling the Lita::Robot#chat_service. See the API docs for Lita::Adapters::Slack::ChatService for details about the provided methods.

API documentation

The API documentation, useful for plugin authors, can be found for the latest gem release on