Slack MCP and Skills Plugin

A Claude Code and Cursor plugin that brings Slack into your AI tools with a Slack MCP Server 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.

Features

MCP Server

The plugin connects your AI tool to Slack's hosted MCP server:

• Search - find messages, files, users, and channels (public and private)
• Messaging - send and schedule messages, read channels, follow threads, add reactions
• Canvas - create, read, and update canvas documents
• Users - read profiles and list channel members

Skills

Six skills load on demand to handle messaging tasks and developer workflows:

• slack:slack-messaging - composing well-formatted, effective Slack messages
• slack:slack-search - finding messages, files, channels, and people
• slack:slack-api - discovering and calling Slack Web API methods
• slack:slack-cli - using the Slack CLI to create, run, and manage apps
• slack:create-slack-app - building a Slack app or agent with the CLI and Bolt
• slack:block-kit - building and validating Block Kit layouts

Commands

Five slash commands for common Slack workflows:

• /slack:summarize-channel <channel-name> - Summarize recent activity in a Slack channel
• /slack:find-discussions <topic> - Find discussions about a specific topic across Slack channels
• /slack:draft-announcement <topic> - Draft a well-formatted Slack announcement and save it as a draft
• /slack:standup - Generate a standup update based on your recent Slack activity
• /slack:channel-digest <channel1, channel2, ...> - Get a digest of recent activity across multiple Slack channels

Usage examples

Once installed, talk to your tool in natural language:

• "Search for messages about the product launch from the last week"
• "Send a message to #general saying the deployment is complete"
• "Summarize the last day of activity in #engineering"
• "Draft an announcement about the new pricing page"
• "Create a new Slack app using Bolt for Python"
• "Build a Block Kit feedback modal with a rating select and a comments field"
• "Validate the Block Kit JSON in ./modal.json"

Documentation

• Slack MCP server
• Slack developer docs
• Block Kit Builder

Limitations

• Workspace admin approval. Your Slack workspace admin must approve MCP integration before you can authenticate.

Contributing

We welcome contributions from everyone! Please check out our contributor's guide for guidelines on opening issues and pull requests.

Working on the plugin itself? See the maintainer's guide for local development setup.