Slack MCP server

Run in your project. --scope local keeps the servers private to you in this project; use user for every project.

claude mcp add --scope local --transport http slack https://mcp.slack.com/mcp

• slack: if the server needs a sign-in, the app will ask (run /mcp in Claude Code).

Project root. Commit it to share the servers with your team; each person sets the variables in their own shell.

{
  "mcpServers": {
    "slack": {
      "type": "http",
      "url": "https://mcp.slack.com/mcp"
    }
  }
}

• slack: if the server needs a sign-in, the app will ask (run /mcp in Claude Code).

macOS: ~/Library/Application Support/Claude/claude_desktop_config.json · Windows: %APPDATA%\Claude\claude_desktop_config.json (Settings → Developer → Edit Config). Restart Claude after saving.

{
  "mcpServers": {}
}

• slack is a remote server: add it as a custom connector (Customize → Connectors → + Add → Add custom connector; on Team and Enterprise plans an owner adds it under Organization settings → Connectors), with the URL https://mcp.slack.com/mcp.

In your project, or ~/.cursor/mcp.json for every project.

{
  "mcpServers": {
    "slack": {
      "url": "https://mcp.slack.com/mcp"
    }
  }
}

• slack: if the server needs a sign-in, the app will ask.

In your workspace. VS Code asks for each secret the first time a server starts and stores it securely.

{
  "servers": {
    "slack": {
      "type": "http",
      "url": "https://mcp.slack.com/mcp"
    }
  }
}

• slack: if the server needs a sign-in, the app will ask.

macOS/Linux: ~/.config/devin/mcp_config.json · Windows: %APPDATA%\devin\mcp_config.json. Read by the default Devin Local agent and by the legacy Cascade agent.

{
  "mcpServers": {
    "slack": {
      "url": "https://mcp.slack.com/mcp"
    }
  }
}

• slack: if the server needs a sign-in, the app will ask.