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mcp/harbor
Grok

Slack for Grok

io.github.mindstone/mcp-server-slack

Slack MCP server: channels, messages, threads, reactions, users, files, and scheduled messages

client:Grok transport:stdio runtime:npm

Install Slack in Grok

.mcp.json (in your project root)

Held in this page only — never stored, logged, or sent anywhere but back to your screen. 

{
  "mcpServers": {
    "mcp-server-slack": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@mindstone/mcp-server-slack"
      ],
      "env": {
        "SLACK_CONFIG_PATH": "<SLACK_CONFIG_PATH>",
        "SLACK_TEAM_ID": "<SLACK_TEAM_ID>",
        "SLACK_CLIENT_ID": "<SLACK_CLIENT_ID>",
        "SLACK_CLIENT_SECRET": "<SLACK_CLIENT_SECRET>",
        "SLACK_DISABLE_REFRESH": "<SLACK_DISABLE_REFRESH>",
        "SLACK_REQUEST_TIMEOUT_MS": "<SLACK_REQUEST_TIMEOUT_MS>",
        "SLACK_MAX_RETRIES": "<SLACK_MAX_RETRIES>",
        "MCP_WORKSPACE_PATH": "<MCP_WORKSPACE_PATH>"
      }
    }
  }
}

Grok Build reads Claude Code's .mcp.json and Claude Desktop's config unchanged, so a server you have already set up there needs nothing new. The Grok web app and X integration do not take custom servers. Grok docs

Slack in other clients

Slack MCP server