MCP Simple Slackbot

A simple Slack bot that uses the Model Context Protocol (MCP) to enhance its capabilities with external tools.

Features

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• AI-Powered Assistant: Responds to messages in channels and DMs using LLM capabilities
• MCP Integration: Full access to MCP tools like SQLite database and web fetching
• Multi-LLM Support: Works with OpenAI, Groq, and Anthropic models
• App Home Tab: Shows available tools and usage information

Setup

1. Create a Slack App

1. Go to api.slack.com/apps and click "Create New App"
2. Choose "From an app manifest" and select your workspace
3. Copy the contents of mcp_simple_slackbot/manifest.yaml into the manifest editor
4. Create the app and install it to your workspace
5. Under the "Basic Information" section, scroll down to "App-Level Tokens"
6. Click "Generate Token and Scopes" and:
   • Enter a name like "mcp-assistant"
   • Add the connections:write scope
   • Click "Generate"
7. Take note of both your:
   • Bot Token (xoxb-...) found in "OAuth & Permissions"
   • App Token (xapp-...) that you just generated

2. Install Dependencies

# Create a virtual environment
python -m venv venv

# Activate the virtual environment
source venv/bin/activate  # On Windows: venv\Scripts\activate

# Install project dependencies
pip install -r mcp_simple_slackbot/requirements.txt

3. Configure Environment Variables

Create a .env file in the mcp_simple_slackbot directory (see .env.example for a template):

# Slack API credentials
SLACK_BOT_TOKEN=xoxb-your-token
SLACK_APP_TOKEN=xapp-your-token

# LLM API credentials
OPENAI_API_KEY=sk-your-openai-key
# or use GROQ_API_KEY or ANTHROPIC_API_KEY

# LLM configuration
LLM_MODEL=gpt-4-turbo

Running the Bot

# Navigate to the module directory
cd mcp_simple_slackbot

# Run the bot directly
python main.py

The bot will:

1. Connect to all configured MCP servers
2. Discover available tools
3. Start the Slack app in Socket Mode
4. Listen for mentions and direct messages

Usage

• Direct Messages: Send a direct message to the bot
• Channel Mentions: Mention the bot in a channel with @MCP Assistant
• App Home: Visit the bot's App Home tab to see available tools

Architecture

The bot is designed with a focused architecture:

1. SlackMCPBot: Core class managing Slack events and message processing
2. LLMClient: Handles communication with LLM APIs (OpenAI, Groq, Anthropic)
3. Server: Manages communication with MCP servers
4. Tool: Represents available tools from MCP servers

When a message is received, the bot:

1. Sends the message to the LLM along with available tools
2. If the LLM response includes a tool call, executes the tool
3. Returns the result to the LLM for interpretation
4. Delivers the final response to the user

Credits

This project is based on the MCP Simple Chatbot example.

License

MIT License