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NerdLevelTech

Comprehensive Guides

Developer Guides

In-depth comprehensive guides covering technical topics from fundamentals to advanced

8 guides

  • Guide · 15 min read

    AI Lead Enrichment + Personalized Outreach in n8n — 6 Nodes, One Form

    Drop a lead's email and company URL into an n8n form. The workflow scrapes the company site, sniffs the tech stack, flags hiring/pricing/compliance signals, then asks gpt-5-mini to return a fit score, 3 reasons, and a personalized cold email. Schema-validated JSON output ready for CRM.

  • Guide · 16 min read

    AI Competitor Page Monitor with Diff + Slack Alerts in n8n

    A daily-scheduled n8n workflow that fetches your competitors' pricing and feature pages, hashes them against yesterday's snapshot in n8n static data, computes a sentence-level diff, and ships only the meaningful changes to Slack — powered by gpt-5-mini. Complete branching workflow with IF logic.

  • Guide · 16 min read

    Daily Multi-Source Tech Digest with AI Ranking + Slack Delivery (n8n)

    An n8n workflow that pulls Hacker News, Dev.to, and GitHub Trending in parallel every morning, AI-summarizes each item in one sentence, then ships a Block Kit Slack message with clickable links. Schedule-triggered, merges three data shapes, and uses `gpt-5-mini` via free credits.

  • Guide · 17 min read

    Build a RAG Chatbot That Answers From Any Webpage in n8n (7 Nodes)

    Wire a chat trigger to an AI agent with windowed memory and retrieval from a live URL. The workflow fetches the page on every question, chunks it, ranks chunks by query relevance, and grounds gpt-5-mini's answer with source citations — no vector DB, no embeddings bill.

  • Guide · 14 min read

    Blog URL → Viral X/Twitter Thread in 6 n8n Nodes

    Paste any article URL into an n8n form and get a hook-first, 5-9 tweet thread written in your chosen tone — with strict structured JSON output via LangChain's Output Parser. Built, imported, and saved live on n8n cloud with gpt-5-mini.

  • Guide · 18 min read

    Turn Any YouTube Video Into a Publish-Ready Blog Post with n8n

    Build an n8n workflow that takes a YouTube URL plus transcript and returns a fully structured, SEO-optimized blog post in Markdown — with a real AI chain, oEmbed metadata lookup, and a prompt tuned for four different editorial styles. Workflow imported, configured, and executed live on n8n cloud.

  • Guide · 25 min read

    Build an AI Research Digest with n8n — No Code, Real Output in 6 Steps

    Build a fully automated AI newsletter that fetches the top 10 Hacker News stories daily, summarizes each with GPT, and formats a polished digest email — all in n8n's visual canvas. Every node was wired and executed live on n8n cloud. No code required beyond one simple JavaScript snippet.