This MCP server, developed by Lars Hagen, enables AI agents to interact with Slack workspaces as users. Built with TypeScript and leveraging the Model Context Protocol SDK, it provides tools for channel management, messaging, reactions, and user profile retrieval. The implementation focuses on user-level interactions, offering functionality like thread replies and emoji reactions. It's particularly useful for AI assistants or automation systems needing to engage in Slack conversations, enabling use cases such as automated responses, channel monitoring, or user analytics without requiring bot-specific permissions.
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Highlight AIList public channels in the workspace. Optional inputs: limit (number, default: 100, max: 200): Maximum number of channels to return; cursor (string): Pagination cursor for next page. Returns: List of channels with their IDs and information.
Post a new message to a Slack channel. Required inputs: channel_id (string): The ID of the channel to post to; text (string): The message text to post. Returns: Message posting confirmation and timestamp.
Reply to a specific message thread. Required inputs: channel_id (string): The channel containing the thread; thread_ts (string): Timestamp of the parent message; text (string): The reply text. Returns: Reply confirmation and timestamp.
Add an emoji reaction to a message. Required inputs: channel_id (string): The channel containing the message; timestamp (string): Message timestamp to react to; reaction (string): Emoji name without colons. Returns: Reaction confirmation.
Get recent messages from a channel. Required inputs: channel_id (string): The channel ID. Optional inputs: limit (number, default: 10): Number of messages to retrieve. Returns: List of messages with their content and metadata.
Get all replies in a message thread. Required inputs: channel_id (string): The channel containing the thread; thread_ts (string): Timestamp of the parent message. Returns: List of replies with their content and metadata.
Get list of workspace users with basic profile information. Optional inputs: cursor (string): Pagination cursor for next page; limit (number, default: 100, max: 200): Maximum users to return. Returns: List of users with their basic profiles.
Get detailed profile information for a specific user. Required inputs: user_id (string): The user's ID. Returns: Detailed user profile information.
