Slack MCP Server

Instructions

Implementation Reference

• slack_mcp/server.py:457-472 (handler)

  The MCP tool handler for 'create_channel', decorated with @mcp.tool(). It instantiates SlackClient and delegates to its create_channel method, returning JSON response.

  @mcp.tool()
  async def create_channel(name: str, is_private: bool = False) -> str:
      """
      Create a new Slack channel.
  
      Args:
          name: Name for the new channel
          is_private: Whether the channel should be private
      """
      try:
          client = SlackClient()
          result = await client.create_channel(name, is_private)
          return json.dumps(result, indent=2)
      except Exception as e:
          return json.dumps({"error": str(e)}, indent=2)

• slack_mcp/server.py:191-195 (helper)

  SlackClient helper method that performs the actual Slack API call to create a channel using conversations.create endpoint.

  async def create_channel(self, name: str, is_private: bool = False) -> Dict[str, Any]:
      """Create a new channel."""
      data = {"name": name, "is_private": is_private}
      return await self._make_request("POST", "conversations.create", json_data=data)

• slack_mcp/server.py:457-457 (registration)

  The @mcp.tool() decorator registers the create_channel function as an MCP tool.

  @mcp.tool()