Slack User MCP Server

MCP server for interacting with Slack as a user

Local serverstdio

What is the Slack User MCP MCP server?

MCP server for interacting with Slack as a user. That is what the slack user mcp mcp server brings to an AI assistant: the same capability, reachable through the Model Context Protocol rather than a separate app or dashboard.

The short version

MCP Server for the Slack API, enabling Claude to interact with Slack workspaces as a user.

Getting it running

This on npm is all you need. Most clients run it directly, so configuration is a few lines and a restart.

The tools it exposes

The server publishes 2 tools. What each one is for:

  • Returns — List of channels with their IDs and information
  • Troubleshooting — If you encounter permission errors, verify that: 1. All required scopes are added to your Slack app 2. The app is properly installed to your

What it needs from you

Configuration is passed through the environment: SLACK_TOKEN, SLACK_TEAM_ID. Treat anything key-shaped as a real credential — scope it to the minimum the server needs, and rotate it if it ever lands in a shared config.

Things to watch

  • It runs with your machine's permissions. That is convenient and also the reason to think about what you point it at before you approve a tool call.
  • Missing credentials fail quietly in some clients — if no tools show up, check the environment block first.
  • Keep per-call confirmation enabled while you learn its behaviour; it is the cheapest safeguard you have.

How it compares

This sits in the team communication group, where several servers overlap in what they claim to do but differ sharply once you actually set them up. Slack User MCP's toolset — Returns, Troubleshooting — is a fair guide to whether it matches your workflow. It is maintained by lars-hagen; worth a glance at recent repository activity before you build anything load-bearing on it.

We check each listing at SyncDev against the project's documentation before it goes live — if something here drifts out of date, it is a bug worth reporting.

Available tools

ToolWhat it does
ReturnsList of channels with their IDs and information
TroubleshootingIf you encounter permission errors, verify that: 1. All required scopes are added to your Slack app 2. The app is properly installed to your workspace 3. The token and, when needed, workspace ID are correctly copied to y

How to install the Slack User MCP MCP server

Then configure Claude Desktop:
```json
{
  "mcpServers": {
    "slack": {
      "command": "npm",
      "args": [
        "run",
        "--prefix",
        "/path/to/slack-user-mcp",
        "start"
      ],
      "env": {
        "SLACK_TOKEN": "xoxp-your-user-token"
      }
    }
  }
}

Configuration as documented by the project. Restart the client after saving.

Configuration

VariableDescriptionRequired
SLACK_TOKENCredential the server authenticates with.Yes
SLACK_TEAM_IDConfiguration value read at startup.Optional

Example prompts to try

  • Use Slack User MCP to Returns.
  • Use Slack User MCP to Troubleshooting.

Frequently asked questions

It connects Slack User MCP to MCP-compatible AI assistants such as Claude and Cursor, exposing 2 tools (Returns, Troubleshooting) that the assistant can call on your behalf. Instead of copying data back and forth by hand, the assistant works with Slack User MCP directly.