mcp/servers/slack.yaml at main · matrixagentsocial/mcp · GitHub

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id: slack
name: Slack MCP Server
description: >
  Provides access to the Slack API through the Model Context Protocol. Enables AI
  agents to read and send messages, manage channels, search conversation history,
  and interact with Slack workspaces. Supports listing channels, reading threads,
  posting messages, and adding reactions programmatically. Originally maintained by
  Anthropic, now maintained by Zencoder.
author:
  name: Zencoder
  github: zencoderai
repository: https://github.com/zencoderai/slack-mcp-server
transport:
  - stdio
category: Communication
tags:
  - slack
  - messaging
  - team-collaboration
  - chat
  - notifications
created_at: "2024-11-25T00:00:00.000Z"
updated_at: "2026-01-27T00:00:00.000Z"
tools:
  - name: send_message
    description: Send a message to a Slack channel or direct message conversation.
    input_schema:
      type: object
      properties:
        channel_id:
          type: string
          description: Slack channel or conversation ID
        text:
          type: string
          description: Message text to send (supports Slack markdown)
        thread_ts:
          type: string
          description: Thread timestamp to reply in a thread
      required:
        - channel_id
        - text
  - name: list_channels
    description: List all public channels in the Slack workspace with their names and topics.
    input_schema:
      type: object
      properties:
        limit:
          type: integer
          description: Maximum number of channels to return (default 100)
        cursor:
          type: string
          description: Pagination cursor for next page of results
  - name: get_channel_history
    description: Retrieve recent messages from a Slack channel.
    input_schema:
      type: object
      properties:
        channel_id:
          type: string
          description: Slack channel ID
        limit:
          type: integer
          description: Number of messages to retrieve (default 10)
      required:
        - channel_id
  - name: search_messages
    description: Search for messages across the Slack workspace matching a query.
    input_schema:
      type: object
      properties:
        query:
          type: string
          description: Search query string
        count:
          type: integer
          description: Number of results to return
      required:
        - query
  - name: add_reaction
    description: Add an emoji reaction to a message in a Slack channel.
    input_schema:
      type: object
      properties:
        channel_id:
          type: string
          description: Channel containing the message
        timestamp:
          type: string
          description: Timestamp of the message to react to
        reaction:
          type: string
          description: Emoji name without colons (e.g., thumbsup)
      required:
        - channel_id
        - timestamp
        - reaction
install:
  npm: "@modelcontextprotocol/server-slack"
  command: npx
  args:
    - "-y"
    - "@modelcontextprotocol/server-slack"
env_vars:
  - name: SLACK_BOT_TOKEN
    description: Slack Bot User OAuth Token (xoxb-...) for API authentication
    required: true
  - name: SLACK_TEAM_ID
    description: Slack workspace team ID
    required: true
license: MIT
version: "0.6.2"
stars: 67