Is Slack safe to install?

Name: Slack
Author: Anthropic (MCP reference, archived)

Anthropic (MCP reference, archived) · Communication · stdio (local process)

Aminimal exposureSource

A

Grade

18/100

Blast radius

8

Tools

1

Capabilities

What Slack declares it can do

A server's blast radius is the most powerful thing each of its tools can do. This grades the tools it declares, read-only, not whether it is secure.

Execute0
Delete0
Write1
Read7

mediumTool declares a high-privilege capability

Tools

Every tool Slack exposes

8 tools

Control

Govern Slack with AxioRank

8 tools

Installed as-is, all 8 of Slack's tools are callable by your agent without restriction, including any that write, delete, or execute.

Flip the switch to see the policy AxioRank would apply.

Install

Add Slack to your client

Drop this into your MCP client config (Claude Desktop, Cursor, and others).

mcp.json

{
  "mcpServers": {
    "slack": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/server-slack"
      ]
    }
  }
}

Embed

Show the grade in your README

Links back to this page and updates when the grade changes.

[![AxioRank MCP Security Index grade for Slack](https://axiorank.com/api/badge/mcp/slack.svg)](https://axiorank.com/mcp-index/slack)

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How it works

About this grade

The grade reflects the blast radius of what Slack declares it can do, read-only, not whether it is secure or trustworthy, and not a judgment of the vendor. Maintain this server? Claim this listing or request a re-scan. See the methodology.

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Let your agents use Slack safely

Route this server through AxioRank to allowlist its tools, hold risky calls for approval, and keep a signed audit trail of every action.

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