Slack

Slack is an MCP server for Claude Code from anthropics/claude-for-legal. Its token cost is not measured, scanned A, original, Apache-2.0.

A connection that lets a coding agent work with Slack, a workplace messaging service. It can search messages, read channels, and find discussions in a Slack workspace.

In plain words
What is it for?
It is for searching Slack messages, reading channel content, and finding relevant workspace discussions.
Why use it?
It helps locate project context and past decisions that are buried in team conversations.

MCP server for Claude Code ✓ vendor

Written for Claude Code: shipped in a Claude Code plugin. Also seen: listed in a Claude config.

Part of the ai-governance-legal plugin — 10 skills, 2 MCP servers shipped together

One of 2 entries in .mcp.json upstream. Installing this one merges just its entry into your config; the other 1 are separate, each on its own page.

Good fit It is for searching Slack messages, reading channel content, and finding relevant workspace discussions.

Compare 6 mcp servers from other repositories ↓
Install with agentmods
npx agentmods add mcp/anthropics/claude-for-legal/slack
About the project

Claude for Legal is a collection of AI agents, skills, and data connectors for legal work such as commercial, privacy, employment, litigation, regulatory, and intellectual-property matters. Lawyers and legal teams use it through Claude Cowork, Claude Code, or the Claude Managed Agents API, with attorney review required for every output. The catalogue entries are its workflow plugins, skills, agents, and connectors.

anthropics/claude-for-legal · 9,415 stars · on GitHub

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.

Clone the repo
git clone --depth 1 https://github.com/anthropics/claude-for-legal

Made for: Claude Code.

Or install ai-governance-legal, the plugin that ships this one along with the rest of its 10 skills, 2 MCP servers.

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/anthropics/claude-for-legal/slack/github.svg)](https://agentmods.dev/mcp/anthropics/claude-for-legal/slack)
Your own site
<a href="https://agentmods.dev/mcp/anthropics/claude-for-legal/slack"><img src="https://agentmods.dev/badge/mcp/anthropics/claude-for-legal/slack/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for Slack

Your own site · 80×15
<a href="https://agentmods.dev/mcp/anthropics/claude-for-legal/slack"><img src="https://agentmods.dev/badge/mcp/anthropics/claude-for-legal/slack.svg" alt="Reviewed on agentmods" width="80" 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. A grade says what 26 rules found in the file — not that it is safe.
Origin original 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 11d 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.

Origin

Copies of this mod

2 near-identical copies found in the catalogue:

  • Slack — 100% identical, 0 lines differ
  • Slack — 100% identical, 0 lines differ
ai-governance-legal/.mcp.json · 8 lines

What it actually says

{
  "Slack": {
    "type": "http",
    "url": "https://mcp.slack.com/mcp",
    "title": "Slack",
    "description": "Search messages, read channels, find discussions across your workspace."
  }
}
Same file

What else .mcp.json configures

This page is one entry in a file that holds 2. Installing the file brings all of them; each is measured and scanned on its own page.

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. 11d ago First seen · 8 lines scan A d0e82130ed44

Subscribe to this mod's changes

Slack is an MCP server published in the GitHub repository anthropics/claude-for-legal (9,415 stars, last pushed 20d ago), licensed Apache-2.0. 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 2026-08-30.