Slack

Slack MCP and Skills Plugin

A [Claude Code][claude-code], [Cursor][cursor], and [Codex][codex-cli] plugin that brings Slack into your AI tools with a [Slack MCP Server][slack-mcp-docs] and set of Slack skills for both users and developers.

Installation

Claude Code

The plugin is published on the official Claude marketplace. Install it from inside Claude Code:

/plugin install slack@claude-plugins-official

The Slack MCP server is configured automatically. You'll be prompted to authenticate to your Slack workspace via OAuth on first use.

Cursor

The plugin is published on the official Cursor Marketplace. Install it from inside Cursor:

/add-plugin slack

This installs the skills, commands, and MCP server together. You'll be prompted to authenticate to your Slack workspace via OAuth on first use.

Codex

The plugin is published as a Codex marketplace in this repository. Add the marketplace, then install the plugin:

codex plugin marketplace add slackapi/slack-skills-plugin
codex plugin add slack@slack

Start a new Codex session to pick up the plugin, then invoke a skill by name with a $ mention, for example $block-kit.

Codex support currently ships the skills only; the MCP server is not yet wired into the Codex surface.

Other agents

The skills install into other coding agents with [npx skills][npx-skills], no plugin marketplace required:

# Install the skills for a coding agent, named by its own identifier
npx skills add slackapi/slack-skills-plugin -y -a <agent>

# For example, Gemini CLI or OpenCode
npx skills add slackapi/slack-skills-plugin -y -a gemini-cli
npx skills add slackapi/slack-skills-plugin -y -a opencode

Other popular agents include crush, devin, hermes-agent, openclaw, and pi. See [supported agents][npx-skills] for the full list of agents and their identifiers. Add -g to install for your user instead of the current project.