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Slack MCP Server

by Mindstone
CommunicationLow Risk9.9MCP RegistryLocal
Free

Server data from the Official MCP Registry

Slack MCP server: channels, messages, threads, reactions, users, files, and scheduled messages

About

Slack MCP server: channels, messages, threads, reactions, users, files, and scheduled messages

Security Report

9.9
Low Risk9.9Low Risk

Valid MCP server (1 strong, 1 medium validity signals). 1 code issue detected. No known CVEs in dependencies. ⚠️ Package registry links to a different repository than scanned source. Imported from the Official MCP Registry. Trust signals: trusted author (35/37 approved). 2 finding(s) downgraded by scanner intelligence.

14 files analyzed · 2 issues found

Security scores are indicators to help you make informed decisions, not guarantees. Always review permissions before connecting any MCP server.

Permissions Required

This plugin requests these system permissions. Most are normal for its category.

file_system

Check that this permission is expected for this type of plugin.

What You'll Need

Set these up before or after installing:

Path to the host-managed Slack config directoryOptional

Environment variable: SLACK_CONFIG_PATH

Slack workspace team ID (one process per workspace)Optional

Environment variable: SLACK_TEAM_ID

Slack OAuth Connected App client ID. Only required to refresh a rotating token; saved non-rotating tokens authorize the Slack API without it.Optional

Environment variable: SLACK_CLIENT_ID

Slack OAuth Connected App client secret. Only required to refresh a rotating token; saved non-rotating tokens authorize the Slack API without it.Required

Environment variable: SLACK_CLIENT_SECRET

Set to 1 to disable token refresh on this surface (cloud surface)Optional

Environment variable: SLACK_DISABLE_REFRESH

Override the upstream timeout (max 300000ms = 5 min)Optional

Environment variable: SLACK_REQUEST_TIMEOUT_MS

WebClient retries on transient failures (0-20). Lower this on cloud to avoid stacking long retry budgets into multi-minute hangs.Optional

Environment variable: SLACK_MAX_RETRIES

Workspace directory upload_slack_file reads are constrained to (defaults to the system temp dir when unset)Optional

Environment variable: MCP_WORKSPACE_PATH

How to Install

Add this to your MCP configuration file:

{
  "mcpServers": {
    "io-github-mindstone-mcp-server-slack": {
      "env": {
        "SLACK_TEAM_ID": "your-slack-team-id-here",
        "SLACK_CLIENT_ID": "your-slack-client-id-here",
        "SLACK_CONFIG_PATH": "your-slack-config-path-here",
        "SLACK_MAX_RETRIES": "your-slack-max-retries-here",
        "MCP_WORKSPACE_PATH": "your-mcp-workspace-path-here",
        "SLACK_CLIENT_SECRET": "your-slack-client-secret-here",
        "SLACK_DISABLE_REFRESH": "your-slack-disable-refresh-here",
        "SLACK_REQUEST_TIMEOUT_MS": "your-slack-request-timeout-ms-here"
      },
      "args": [
        "-y",
        "@mindstone/mcp-server-slack"
      ],
      "command": "npx"
    }
  }
}

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