Slack MCP Server

npx -y slack-mcp-server@latest --transport stdio

{
  "mcpServers": {
    "slack-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "slack-mcp-server@latest",
        "--transport",
        "stdio"
      ]
    }
  }
}

A Go-based MCP server that exposes channel history, threads, message search and reactions to an assistant. It accepts bot and user OAuth tokens as well as browser session tokens, so it can run in workspaces where installing a new app is not an option. Stdio, SSE and streamable HTTP transports are all supported. It is a community project and is not published by Slack.