AI Chatbot Agent for Slack Slash Commands (n8n & OpenAI)

Unlock AI-Powered Slack Interactions with this AI Chatbot Agent

This n8n workflow transforms your Slack workspace into an interactive command center by connecting custom slash commands to the powerful capabilities of OpenAI. When a user invokes a registered slash command (e.g., /ask What is n8n?), this AI Agent captures the query, sends it to an OpenAI language model (like GPT-4o mini) via Langchain for processing, and then delivers the AI-generated response directly back into the Slack channel or to the user who initiated the command. It's perfect for getting quick answers, drafting text, or tapping into AI-driven insights without ever leaving your primary communication platform.

Key Features & Benefits

• Direct Slack Integration: Trigger AI actions seamlessly using intuitive custom slash commands (e.g., /ask, /summarize).
• Intelligent Query Processing: Leverages OpenAI's advanced LLMs (like gpt-4o-mini) via Langchain for context-aware and relevant responses.
• Customizable Command Routing: Easily define and route multiple slash commands using the Switch node to perform different AI tasks or call various prompts.
• Dynamic Channel Responses: Automatically sends AI-generated replies back to the originating Slack channel or as a direct message to the user.
• Boost Team Productivity: Provides instant AI assistance within Slack, reducing context switching and streamlining information retrieval or content creation.
• Simple to Extend: Built on n8n, allowing for easy modification to include more commands, connect to other tools, or refine AI interactions.

• An n8n instance (Cloud or self-hosted).
• OpenAI API Key with access to a suitable model (e.g., gpt-4o-mini).
• Slack workspace with permissions to create slash commands.
• Slack credentials configured in n8n for the 'Send a Message' node.

1. Download the n8n workflow JSON file.
2. Import the workflow into your n8n instance.
3. In the 'Webhook' node: Copy the TEST or PRODUCTION Webhook URL. This URL is needed for Slack slash command configuration.
4. Create a new Slash Command in your Slack App configuration (api.slack.com/apps): a. Navigate to 'Slash Commands' under 'Features' in your selected Slack App. b. Click 'Create New Command'. c. Define your command (e.g., /ask). d. Paste the n8n Webhook URL (from step 3) into the 'Request URL' field. e. Add a short description and save the command.
5. Configure the 'OpenAI Chat Model' node: Select your OpenAI credential and choose a model (e.g., gpt-4o-mini).
6. In the 'Basic LLM Chain' node: The text parameter is set to {{ $json.body.text }} by default, which captures the text typed after your slash command. You can customize the prompt logic here if needed.
7. In the 'Switch' node: Review the routing rules. The leftValue is set to {{ $json.body.command }}. Update the rightValue for each output to match the slash commands you configured in Slack (e.g., /ask). Add more outputs for additional commands.
8. Configure the 'Send a Message' (Slack) node: Ensure your Slack credentials are correctly set up. The channelId is dynamically set to {{ $('Webhook').item.json.body.channel_id }} to respond to the channel where the command was used.
9. Activate the workflow.
10. Test your slash command in any Slack channel where the app/bot user is added.