io.github.crunchtools/slack

mcp-slack-crunchtools

Secure read-only MCP server for Slack workspaces

2 GitHub PyPI

No known CVEs

No license

Actively maintained

Last commit 11d ago

Works with most clients

Transport: http

0 tools

Grade F

MCPpedia last refreshed this data 1d ago

Edit this pageView history

Productivity Developer Tools

Step 1

Install in your client

Config is the same across clients — only the file and path differ.

Supported in Claude Desktophttp · Node 18+

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

{
  "mcpServers": {
    "io-github-crunchtools-slack-crunchtools": {
      "args": [
        "mcp-slack-crunchtools"
      ],
      "command": "uvx"
    }
  }
}

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[![MCPpedia Score](https://mcppedia.org/api/badge/io-github-crunchtools-slack-crunchtools)](https://mcppedia.org/s/io-github-crunchtools-slack-crunchtools)

Read me

What io.github.crunchtools/slack does

Secure read-only MCP server for Slack workspaces. Provides Claude Code (and other MCP clients) with access to your Slack channels, messages, users, and files without any write permissions.

Test This Server

Run this in your terminal to verify the server starts. Then let us know if it worked — your result helps other developers.

uvx 'mcp-slack-crunchtools' 2>&1 | head -1 && echo "✓ Server started successfully"

After testing, let us know if it worked:

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Scored, not listed

Why this score

Five weighted categories — click any category to see the underlying evidence.

Score breakdown

53/100across 5 weighted dimensions

How we score →

0255075100

−47

Security

Maintenance

Efficiency

Documentation

Compatibility

Categoriesclick a row to see evidence

Security

OSV.dev

No known CVEs.

Checked mcp-slack-crunchtools against OSV.dev.

Community

Reviews

Be the first to review

Have you used this server?

Share your experience — it helps other developers decide.

How easy was setup?Did it work reliably?How was the documentation?

Frequently Asked Questions

Is io.github.crunchtools/slack safe to use?: io.github.crunchtools/slack has no known CVEs as of the latest MCPpedia security scan. It does not require authentication, so any local process can connect — keep this in mind in shared environments.
How do I install io.github.crunchtools/slack?: io.github.crunchtools/slack supports copy-paste install configs on its MCPpedia page for Claude Desktop, Cursor, and Claude Code. Scroll to the Quick Install section and select your client.
What AI clients work with io.github.crunchtools/slack?: io.github.crunchtools/slack is compatible with claude-desktop, cursor, claude-code. It uses http transport.
Is io.github.crunchtools/slack actively maintained?: io.github.crunchtools/slack is actively maintained — last commit was 11 days ago. It has 2 GitHub stars.

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Community

Discussion

Start a conversation

Ask a question, share a tip, or report an issue.

Has anyone used this with Cursor?How do you handle auth?Any alternatives?

Features

Read-only: 15 tools, all read-only. Never posts, edits, or deletes anything.

Secure: 6-layer security model (input validation, token handling, client hardening, output sanitization, runtime protection, supply chain security).

User OAuth Token: Uses xoxp- tokens for user-scoped access to your workspace.

No SDK dependency: Uses httpx directly for minimal, auditable HTTP calls.

Quick Start

Using uvx (Recommended)

claude mcp add mcp-slack-crunchtools \ --env SLACK_USER_TOKEN=xoxp-your-token \ -- uvx mcp-slack-crunchtools

Using Container

claude mcp add mcp-slack-crunchtools \ --env SLACK_USER_TOKEN=xoxp-your-token \ -- podman run -i --rm -e SLACK_USER_TOKEN quay.io/crunchtools/mcp-slack

Local Development

claude mcp add mcp-slack-crunchtools \ --env SLACK_USER_TOKEN=xoxp-your-token \ -- uv run mcp-slack-crunchtools

Tools

Tool

Description

slack_auth_test

Test connection and get token owner info

slack_list_channels

List workspace channels

slack_get_channel_info

Get channel details

slack_get_channel_history

Read channel messages

slack_get_thread_replies

Read thread replies

slack_list_channel_members

List channel members

slack_search_messages

Search messages

slack_get_reactions

Get message reactions

slack_list_reactions

List user's reactions

slack_list_stars

List starred items

slack_get_user_info

Get user details

slack_list_users

List workspace members

slack_get_user_profile

Get user profile

slack_list_files

List files (metadata only)

slack_get_file_info

Get file metadata

Frequently Asked Questions

Is io.github.crunchtools/slack safe to use?

io.github.crunchtools/slack has no known CVEs as of the latest MCPpedia security scan. It does not require authentication, so any local process can connect — keep this in mind in shared environments.

How do I install io.github.crunchtools/slack?

io.github.crunchtools/slack supports copy-paste install configs on its MCPpedia page for Claude Desktop, Cursor, and Claude Code. Scroll to the Quick Install section and select your client.

What AI clients work with io.github.crunchtools/slack?

io.github.crunchtools/slack is compatible with claude-desktop, cursor, claude-code. It uses http transport.

Is io.github.crunchtools/slack actively maintained?

io.github.crunchtools/slack is actively maintained — last commit was 11 days ago. It has 2 GitHub stars.

mcp-slack-crunchtools

Secure read-only MCP server for Slack workspaces. Provides Claude Code (and other MCP clients) with access to your Slack channels, messages, users, and files without any write permissions.

Features

Read-only: 15 tools, all read-only. Never posts, edits, or deletes anything.
Secure: 6-layer security model (input validation, token handling, client hardening, output sanitization, runtime protection, supply chain security).
User OAuth Token: Uses xoxp- tokens for user-scoped access to your workspace.
No SDK dependency: Uses httpx directly for minimal, auditable HTTP calls.

Quick Start

Using uvx (Recommended)

claude mcp add mcp-slack-crunchtools \
    --env SLACK_USER_TOKEN=xoxp-your-token \
    -- uvx mcp-slack-crunchtools

Using Container

claude mcp add mcp-slack-crunchtools \
    --env SLACK_USER_TOKEN=xoxp-your-token \
    -- podman run -i --rm -e SLACK_USER_TOKEN quay.io/crunchtools/mcp-slack

Local Development

claude mcp add mcp-slack-crunchtools \
    --env SLACK_USER_TOKEN=xoxp-your-token \
    -- uv run mcp-slack-crunchtools

Setup

See CLAUDE.md for detailed instructions on creating a Slack app and obtaining a User OAuth Token.

Tools

Tool	Description
`slack_auth_test`	Test connection and get token owner info
`slack_list_channels`	List workspace channels
`slack_get_channel_info`	Get channel details
`slack_get_channel_history`	Read channel messages
`slack_get_thread_replies`	Read thread replies
`slack_list_channel_members`	List channel members
`slack_search_messages`	Search messages
`slack_get_reactions`	Get message reactions
`slack_list_reactions`	List user's reactions
`slack_list_stars`	List starred items
`slack_get_user_info`	Get user details
`slack_list_users`	List workspace members
`slack_get_user_profile`	Get user profile
`slack_list_files`	List files (metadata only)
`slack_get_file_info`	Get file metadata

Security

See SECURITY.md for the full security design document.

License

AGPL-3.0-or-later