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slack

slack is an MCP server for Claude Code from adelaidasofia/slack-mcp. Its token cost is not measured, scanned A, original, MIT.

A local connector for Slack, a team messaging service, using the Slack MCP server.

In plain words
What is it for?
Use it for Slack-related tasks supported by the connected server.
Why use it?
It provides a way for an agent to work with Slack through its configured server.

MCP server for Claude Code

Written for Claude Code: ${CLAUDE_PLUGIN_ROOT} variable. Also seen: listed in a Claude config.

Runs only inside its plugin — its command needs a path that Claude Code sets for a plugin’s own hooks and for nothing else. Install the plugin, not this.

Part of the slack-mcp plugin — 1 hook, 2 MCP servers shipped together

not rated 1repo 3d ago A scan tokens not measured original MIT

Good fit Use it for Slack-related tasks supported by the connected server.

Compare 6 mcp servers from other repositories ↓
View source ↗ adelaidasofia/slack-mcp diazroa.com
Install

Getting it into your agent

This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.

Claude Code
/plugin marketplace add adelaidasofia/slack-mcp
Claude Code
/plugin install slack-mcp

Made for: Claude Code.

Or install slack-mcp, the plugin that ships this one along with the rest of its 1 hook, 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/adelaidasofia/slack-mcp/slack.svg)](https://agentmods.dev/mcp/adelaidasofia/slack-mcp/slack)
Your own site
<a href="https://agentmods.dev/mcp/adelaidasofia/slack-mcp/slack"><img src="https://agentmods.dev/badge/mcp/adelaidasofia/slack-mcp/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. 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 7d 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.

.mcp.json · 10 lines

What it actually says

{
  "slack": {
    "command": "python3",
    "args": [
      "-m",
      "slack_mcp.server"
    ],
    "cwd": "${CLAUDE_PLUGIN_ROOT}"
  }
}
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. 7d ago First seen · 10 lines scan A 467502e08bd7

Subscribe to this mod's changes

slack is an MCP server published in the GitHub repository adelaidasofia/slack-mcp (1 stars, last pushed 3d ago), licensed MIT. 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.

Claude Codeanthropicclaudefastmcpmcpmodel-context-protocol
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