slack

slack is an MCP server for Claude Code, Codex, Cursor, Gemini CLI, OpenCode from crunchtools/mcp-slack. Its token cost is not measured, scanned A, original, AGPL-3.0.

A local, read-only connection to Slack workspaces through the Model Context Protocol (MCP), a standard way for coding agents to use external tools.

In plain words
What is it for?
Reading information from Slack while working on a coding task, such as checking workspace context or finding relevant discussions.
Why use it?
It lets an agent read Slack workspace information without giving it permission to change messages or other data.

MCP server for Claude CodeCodexCursorGemini CLIOpenCode

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add mcp/crunchtools/mcp-slack/slack
Clone the repo
git clone --depth 1 https://github.com/crunchtools/mcp-slack

Made for: Claude Code, Codex, Cursor, Gemini CLI, OpenCode.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for slack

README.md
[![agentmods](https://agentmods.dev/badge/mcp/crunchtools/mcp-slack/slack.svg)](https://agentmods.dev/mcp/crunchtools/mcp-slack/slack)
Your own site
<a href="https://agentmods.dev/mcp/crunchtools/mcp-slack/slack"><img src="https://agentmods.dev/badge/mcp/crunchtools/mcp-slack/slack.svg" alt="Measured on agentmods" height="20"></a>
Per session not measured What this adds to a session before it is invoked.
When invoked not measured Not applicable: nothing here is loaded into a session.
Security scan A 0 findings. Scan, not verified.
Origin unknown No closer match found in the catalogue.
Security

Grade A, and why

slack scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 3d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

server.json · 9 lines

The source is not reproduced here

Licensed AGPL-3.0

The repository is licensed AGPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

Read it on GitHub

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 3d ago First seen · 9 lines scan A 9c0a11905a9b

Subscribe to this mod's changes

slack is an MCP server published in the GitHub repository crunchtools/mcp-slack (2 stars, last pushed 1mo ago), licensed AGPL-3.0. Its token cost is not measured: an MCP server costs its tool schemas, not its config file. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.