n8n AI Agent vs Chain: Which Should You Use? (2026)
Every n8n builder reaches for the AI Agent by reflex, but a Basic LLM Chain costs roughly 5x less per 1,000 runs on Haiku 4.5. Learn the one mechanical rule that decides which node to use.
Tag
#solopreneur
Build a Question and Answer Chain in n8n (Answer From Your Docs)
The n8n Question and Answer Chain retrieves passages from your own vector store and answers from them, not from the model's memory. Index once for about $0.01, then answer 1,000 questions for about $2.50 on Claude Haiku 4.5.
Add Human Approval to an n8n AI Agent (Send and Wait)
Your n8n AI agent can send emails, issue refunds, and delete records. Gate the irreversible ones with Send and Wait for Response. Here is the exact build, the decision table, and what can go wrong.
Build a Scheduled Daily AI Digest in n8n (Auto-Summarized)
An n8n daily digest wires a Schedule Trigger, an RSS fetch, a Claude Summarization Chain, and a delivery node into one unattended workflow that drops a short brief in your inbox every morning for about $1/month.
Build an AI Document-Extraction Agent in n8n (Invoices, Receipts & Emails)
Build an n8n AI document extraction agent that reads invoices, receipts, and emails, then writes clean structured data to a sheet. Uses Claude and the Information Extractor node. Costs $1.55 per 1,000 documents on Haiku 4.5.
Give Your n8n AI Agent Memory (Postgres Chat Memory, Step by Step)
Your n8n agent forgets every message because the model is stateless. Add Postgres Chat Memory, set a per-user Session Key, and tune Context Window Length to keep conversations coherent without blowing your token budget.
Build a Vector Store in n8n (Embeddings for RAG)
Build an n8n vector store that retrieves your own documents by meaning, not keywords. Embedding 1,000 docs costs ~1.3 cents; Supabase free-tier storage costs $0. Full node wiring and step-by-step setup inside.
Give Your n8n AI Agent Tools (Calculator, HTTP, Workflows)
Your n8n AI Agent answers from stale training data until you attach real tools. This guide shows you exactly how to wire HTTP Request, Calculator, and Workflow tools so your agent acts on live data.
Build an AI Lead-Generation Agent in n8n (With Real Monthly Cost)
An n8n AI lead generation agent triages every inbound lead the moment it lands: scoring intent, drafting a personalized reply, and pinging you on the hot ones. Real cost: about $5/month for 100 leads on Claude Sonnet 4.6.
How to Use n8n with MCP: Client, Server, and AI Agent Setup
Your n8n AI agent can chat, but it cannot act beyond the nodes you hard-wired. The MCP Client Tool and MCP Server Trigger change that: one gives your agent a server's worth of tools, the other turns your workflows into tools Claude can call.
How to Use Google Sheets as a Database for Your n8n Automations
Turn a Google Sheet into a real datastore for your n8n automations. This guide covers the full CRUD mapping, the Append or Update Row upsert, API quota limits, and when to move to a real database.
Build an AI Telegram Bot With n8n (No Code, No Fees)
Build an AI-powered n8n Telegram bot in under an hour using three nodes and zero platform fees. Get a shareable t.me link, no business verification required, and a bot that replies around the clock.
How to Back Up and Version Your n8n Workflows With Git
Self-hosted n8n stores every workflow in one database file. This guide shows you the free CLI-to-Git backup method, the exact export commands, and the encryption key step most tutorials skip.
5 n8n Workflows That Can Save You ~12 Hours a Week
Five n8n workflows that replace source scanning, topic sorting, first-draft writing, pin prep, and changelog monitoring with a review-gated queue. Nothing autopublishes. You stay in control.
How to Self-Host n8n on a VPS in 2026 (Full Setup Guide)
Self-hosting n8n on a VPS gives solopreneurs unlimited workflows, full data ownership, and a monthly bill under $10. This guide walks you through the exact 7-step setup.
How Solopreneurs Use AI to Automate Lead Follow-Up and Client Onboarding
Two hidden time-sinks bookend every solo deal: chasing leads before they say yes, and onboarding clients after. Here's how solopreneurs use AI to automate both ends of the journey, from first inquiry to kickoff call.