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Slack Server

@korotovsky · github.com/korotovsky/slack-mcp-server

The most powerful MCP server for Slack Workspaces.

ClaimedCommunicationstdiolocal auth

GitHub

Install one command

terminal

$ npx @modelcontextprotocol/inspector go run mcp/mcp-server.go --transport stdio

Or add it with the Claude CLI: claude mcp add korotovsky-slack-mcp-server

Tools exposed 14 tools

slack_mcp_enabled_tools

conversations_add_message

reactions_add

reactions_remove

attachment_get_data

conversations_history

conversations_replies

conversations_search_messages

channels_list

usergroups_list

usergroups_me

usergroups_create

usergroups_update

usergroups_users_update

Configuration claude_desktop_config.json

claude_desktop_config.json

{
  "mcpServers": {
    "korotovsky-slack-mcp-server": {
      "command": "npx",
      "args": ["@modelcontextprotocol/inspector", "go", "run", "mcp/mcp-server.go", "--transport", "stdio"],
      "env": {
        "SLACK_MCP_ADD_MESSAGE_TOOL": "<your-slack-mcp-add-message-tool>",
        "SLACK_MCP_REACTION_TOOL": "<your-slack-mcp-reaction-tool>",
        "SLACK_MCP_MARK_TOOL": "<your-slack-mcp-mark-tool>",
        "SLACK_MCP_XOXC_TOKEN": "<your-slack-mcp-xoxc-token>",
        "SLACK_MCP_XOXD_TOKEN": "<your-slack-mcp-xoxd-token>",
        "SLACK_MCP_XOXP_TOKEN": "<your-slack-mcp-xoxp-token>",
        "SLACK_MCP_XOXB_TOKEN": "<your-slack-mcp-xoxb-token>",
        "SLACK_MCP_API_KEY": "<your-slack-mcp-api-key>",
        "SLACK_MCP_USER_AGENT": "<your-slack-mcp-user-agent>",
        "SLACK_MCP_CUSTOM_TLS": "<your-slack-mcp-custom-tls>"
      }
    }
  }
}

Paste under mcpServers in your config, then restart Claude Desktop. For Claude Code, reference this server in your project's CLAUDE.md.

Slack Server

Install one command

Tools exposed 14 tools

Configuration claude_desktop_config.json

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