Easy Slack

🚀 The Easiest way to run Slack MCP

Slack integration for AI assistants - Connect Cursor, Claude Desktop, and other MCP-compatible tools directly to Slack. Send messages, read channels, manage users, and automate workflows with AI.

npm version License: MIT Node.js TypeScript MCP Slack API Powered by easy-mcp-server

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📦 What We Provide

Feature	Description
MCP Server	Full Model Context Protocol integration for AI assistants (Cursor, Claude Desktop, etc.)
REST API	Complete Slack API wrapper with OpenAPI/Swagger documentation
Message Management	Send, update, and delete messages in channels and DMs
Channel Operations	List, create, view details, and read message history for channels
User Management	List users, get user info, and access user profiles
File Operations	Upload files, list files, and get file information
Reactions	Add and remove emoji reactions to messages
Interactive Docs	Swagger UI for exploring and testing all endpoints
Zero Configuration	Run with a single command - just provide your Slack bot token
Production Ready	Built on easy-mcp-server framework

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🚀 Quick Start

SLACK_BOT_TOKEN=xoxb-your-token-here npx easy-slack-mcp

That's it! The server runs on:

Service	URL	Notes
REST API	http://localhost:8887	Base for all endpoints
API Docs (Swagger UI)	http://localhost:8887/docs	Interactive documentation
MCP Server	http://localhost:8888	For MCP-compatible clients

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📋 Detailed Configuration

Getting Your Slack Bot Token

1. Go to https://api.slack.com/apps
2. Click "Create New App" → "From scratch"
3. Give your app a name and select your workspace
4. Click "Create App"
5. Navigate to "OAuth & Permissions" in the sidebar
6. Scroll down to "Bot Token Scopes" and add the following scopes:
   • chat:write - Send messages
   • chat:write.public - Send to channels bot isn't in
   • channels:read - View channel info
   • channels:history - Read channel messages
   • users:read - View users
   • users:read.email - View email addresses
   • files:write - Upload files
   • files:read - View files
   • reactions:write - Add reactions
   • reactions:read - View reactions
7. Scroll to the top and click "Install to Workspace"
8. Authorize the app
9. Copy your Bot User OAuth Token (starts with xoxb-)

Using Environment Variables

Instead of passing the token inline, you can use a .env file for persistent configuration:

# Create .env file
echo "SLACK_BOT_TOKEN=xoxb-your-token-here" > .env

# Run (it will automatically load .env)
npx easy-slack-mcp

Local Installation

For a permanent local installation:

# Install locally
npm install easy-slack-mcp

# Create .env file
echo "SLACK_BOT_TOKEN=xoxb-your-token-here" > .env

# Run
npm start
# OR
npx easy-slack-mcp

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💻 Use in Cursor / Claude Desktop

Option A: Use as npm package (Recommended)

For Cursor:

1. Open Cursor Settings → Features → Model Context Protocol
2. Click "Edit Config"
3. Add this to your MCP config:

{
  "mcpServers": {
    "easy-slack-mcp": {
      "command": "npx",
      "args": ["-y", "easy-slack-mcp"],
      "env": {
        "SLACK_BOT_TOKEN": "xoxb-your-token-here"
      }
    }
  }
}

For Claude Desktop:

1. Open ~/Library/Application Support/Claude/claude_desktop_config.json (Mac) or %APPDATA%\Claude\claude_desktop_config.json (Windows)
2. Add the same configuration above

For any MCP client: The server runs automatically when invoked via npx easy-slack-mcp

Client configuration paths

Client	Platform	Config Location
Cursor	macOS/Windows/Linux	Settings → Features → Model Context Protocol
Claude Desktop	macOS	~/Library/Application Support/Claude/claude_desktop_config.json
Claude Desktop	Windows	%APPDATA%\Claude\claude_desktop_config.json

Option B: Local Installation

If you prefer a local setup:

# Install locally
npm install easy-slack-mcp

# Create .env file
echo "SLACK_BOT_TOKEN=xoxb-your-token-here" > .env

# Run it
npx easy-slack-mcp

Then configure your MCP client to run:

npx easy-slack-mcp

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📡 Using the REST API

Once the server is running, you have full access to Slack via REST endpoints.

🔍 Interactive API Documentation

Name	URL	Best for
Swagger UI	http://localhost:8887/docs	Browsing endpoints, trying requests, viewing schemas
OpenAPI JSON	http://localhost:8887/openapi.json	Import into Postman/Insomnia or tooling

📝 Common API Examples

Send a Message

curl -X POST http://localhost:8887/slack/messages \
  -H "Content-Type: application/json" \
  -d '{
    "channel": "C1234567890",
    "text": "Hello from easy-slack-mcp!"
  }'

List Channels

curl "http://localhost:8887/slack/conversations/list?types=public_channel"

Get Channel History

curl "http://localhost:8887/slack/conversations/history?channel=C1234567890&limit=20"

List Users

curl "http://localhost:8887/slack/users/list"

Upload a File

curl -X POST http://localhost:8887/slack/files/upload \
  -H "Content-Type: application/json" \
  -d '{
    "channels": "C1234567890",
    "filename": "report.txt",
    "content": "File content here"
  }'

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📚 All Available Endpoints

Category	Method	Path	Description
Messages	POST	/slack/messages	Send a message
Messages	POST	/slack/messages/update	Update a message
Messages	POST	/slack/messages/delete	Delete a message
Conversations	GET	/slack/conversations/list	List all channels
Conversations	GET	/slack/conversations/info	Get channel details
Conversations	POST	/slack/conversations/create	Create a channel
Conversations	GET	/slack/conversations/history	Get message history
Users	GET	/slack/users/list	List workspace users
Users	GET	/slack/users/info	Get user details
Users	GET	/slack/users/profile	Get user profile
Files	POST	/slack/files/upload	Upload a file
Files	GET	/slack/files/list	List files
Files	GET	/slack/files/info	Get file info
Reactions	POST	/slack/reactions/add	Add a reaction
Reactions	POST	/slack/reactions/remove	Remove a reaction
Authentication	GET	/slack/auth/test	Test authentication
System	GET	/health	Health check
System	GET	/api-info	API information
System	GET	/openapi.json	OpenAPI specification
System	GET	/docs	Swagger UI documentation

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⚙️ Advanced Configuration

Environment Variables

All configuration can be set via environment variables:

Name	Required	Default	Description
SLACK_BOT_TOKEN	Yes	—	Bot User OAuth Token (starts with xoxb-)
SLACK_APP_TOKEN	No	—	App-level token for Socket Mode (starts with xapp-)
SLACK_SIGNING_SECRET	No	—	Verifies Slack request signatures for Events/API Gateway
EASY_MCP_SERVER_PORT	No	8887	REST API port
EASY_MCP_SERVER_MCP_PORT	No	8888	MCP server port

Example .env content:

SLACK_BOT_TOKEN=xoxb-your-token-here
# Optional
SLACK_APP_TOKEN=xapp-your-app-token
SLACK_SIGNING_SECRET=your-signing-secret
EASY_MCP_SERVER_PORT=8887
EASY_MCP_SERVER_MCP_PORT=8888

Required Slack Scopes

See the Detailed Configuration section above for setup steps. The bot typically needs these scopes:

Scope	Purpose
chat:write	Send messages as the bot
chat:write.public	Post to channels the bot isn’t a member of
channels:read	View basic channel information
channels:history	Read channel messages
users:read	View users in the workspace
users:read.email	View user email addresses
files:write	Upload files
files:read	View files
reactions:write	Add reactions to messages
reactions:read	View reactions on messages

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🎯 Use Cases

In Cursor / Claude Desktop

• "Send a message to #general about the project update"
• "What's the latest activity in #support channel?"
• "Find user @john and show their profile"
• "Summarize this week's messages in #engineering"

Via REST API

• Build custom integrations
• Automate Slack workflows
• Create Slack bots
• Integrate with other services

Via Swagger UI

• Explore endpoints visually
• Test API calls
• Understand request/response formats
• Share API documentation

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📖 Learn More

• Easy MCP Server Framework:
  • GitHub Repository
  • npm Package
• Full Setup Guide: See mcp/resources/slack-quick-start.md
• Complete API Docs: See mcp/resources/api-documentation.md
• Slack API: https://api.slack.com/methods
• Model Context Protocol: https://modelcontextprotocol.io/

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📦 Package Info

Item	Link/Value
npm	easy-slack-mcp
Repository	GitHub
License	MIT

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🆘 Need Help?

1. Check Swagger UI: http://localhost:8887/docs
2. Test authentication: curl http://localhost:8887/slack/auth/test
3. Check server health: curl http://localhost:8887/health
4. Review the setup guide
5. For customization or support, contact [email protected]

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Ready to automate Slack with AI? Get started:

# Install and run directly
npx easy-slack-mcp

# Or install locally for project use
npm install easy-slack-mcp
npm start

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Powered by easy-mcp-server framework