io.github.crunchtools/slack

mcp-slack-crunchtools

Secure read-only MCP server for Slack workspaces

1 0 tools GitHub PyPI

No known CVEs

No license

Maintained

Last commit 54d ago

Works with most clients

Transport: http

0 tools

Grade F

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Communication

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

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

Read me

What io.github.crunchtools/slack does

Secure read-only MCP server for Slack workspaces

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

48/100across 5 weighted dimensions

How we score →

0255075100

−52

Security

Maintenance

Efficiency

Documentation

Compatibility

Categoriesclick a row to see evidence

Security

OSV.dev

No known CVEs.

Checked mcp-slack-crunchtools against OSV.dev.

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Community

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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 recently maintained — last commit was 54 days ago. It has 1 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 recently maintained — last commit was 54 days ago. It has 1 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