n8n is the most powerful automation platform for AI workflows. It's open source, self-hostable, and has built-in AI agent capabilities that go beyond simple prompt-response patterns.

Why n8n for AI

• AI Agent node — Built-in agent that can plan, use tools, and iterate
• Vector store support — Connect to Pinecone, Qdrant, Supabase for RAG
• Memory nodes — Agents remember context across interactions
• Self-hosted — Your data never leaves your infrastructure
• Code nodes — Full JavaScript/Python when you need custom logic

n8n AI Agent Architecture

The AI Agent node in n8n works like a mini autonomous agent:

1. Receives a task
2. Plans which tools to use
3. Executes tools (search, database query, API call)
4. Evaluates results
5. Decides if more tool calls are needed
6. Returns final answer

Pattern 1: Knowledge Base Agent

Chat trigger → AI Agent:

• Tool: Vector Store (search company docs)
• Tool: Google Search (search for recent info)
• Tool: Calculator (for numerical questions)
• Memory: Window Buffer (last 10 messages) → Respond with sourced answer

Pattern 2: Data Enrichment Pipeline

Webhook (new lead) → AI Agent:

• Tool: HTTP Request (search LinkedIn, company website)
• Tool: Database (check existing records)
• Tool: OpenAI (summarize findings) → CRM: Update lead with enriched data → Slack: Notify sales with summary

Pattern 3: Automated Report Generator

Schedule (every Monday 8am) → Database: Pull last week's metrics → AI Agent:

• Tool: Database (query for details)
• Tool: OpenAI (analyze trends, write narrative)
• Tool: Chart generator (create visualizations) → Email: Send formatted report to stakeholders

Self-Hosting n8n

Run n8n on your own infrastructure:

docker run -it --rm --name n8n -p 5678:5678 n8nio/n8n

Benefits of self-hosting:

• Full data privacy — nothing leaves your servers
• No per-execution costs
• Custom integrations with internal systems
• Unlimited executions