Slack MCP Server

Name: Slack MCP Server
Author: io.github.aaronsb

io.github.aaronsb/slack-mcp

Repository Registry

What is the Slack MCP server?

Read and write Slack with session tokens — no OAuth, no bot, no admin approval.

How to install Slack

Copy-paste configuration for popular MCP clients.

transport: stdio

Config generated by PluginBench — verify against the source before use.

Environment / auth

SLACK_MCP_XOXC_TOKEN
Slack session token. Optional — the auth-setup tool extracts it from your browser and stores it in the config file.
SLACK_MCP_XOXD_TOKEN
Slack session cookie. Optional — the auth-setup tool extracts it from your browser and stores it in the config file.

Claude Desktop

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "slack-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@aaronsb/slack-mcp"
      ],
      "env": {
        "SLACK_MCP_XOXC_TOKEN": "<YOUR_SLACK_MCP_XOXC_TOKEN>",
        "SLACK_MCP_XOXD_TOKEN": "<YOUR_SLACK_MCP_XOXD_TOKEN>"
      }
    }
  }
}

Cursor

~/.cursor/mcp.json

{
  "mcpServers": {
    "slack-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@aaronsb/slack-mcp"
      ],
      "env": {
        "SLACK_MCP_XOXC_TOKEN": "<YOUR_SLACK_MCP_XOXC_TOKEN>",
        "SLACK_MCP_XOXD_TOKEN": "<YOUR_SLACK_MCP_XOXD_TOKEN>"
      }
    }
  }
}

Windsurf

~/.codeium/windsurf/mcp_config.json

{
  "mcpServers": {
    "slack-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@aaronsb/slack-mcp"
      ],
      "env": {
        "SLACK_MCP_XOXC_TOKEN": "<YOUR_SLACK_MCP_XOXC_TOKEN>",
        "SLACK_MCP_XOXD_TOKEN": "<YOUR_SLACK_MCP_XOXD_TOKEN>"
      }
    }
  }
}

VS Code

.vscode/mcp.json

{
  "servers": {
    "slack-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@aaronsb/slack-mcp"
      ],
      "env": {
        "SLACK_MCP_XOXC_TOKEN": "<YOUR_SLACK_MCP_XOXC_TOKEN>",
        "SLACK_MCP_XOXD_TOKEN": "<YOUR_SLACK_MCP_XOXD_TOKEN>"
      }
    }
  }
}

Claude Code

claude mcp add slack-mcp --env SLACK_MCP_XOXC_TOKEN=<YOUR_SLACK_MCP_XOXC_TOKEN> --env SLACK_MCP_XOXD_TOKEN=<YOUR_SLACK_MCP_XOXD_TOKEN> -- npx -y @aaronsb/slack-mcp

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