Technical SEO audits with GPT-4o-mini & multi-format reporting (Sheets/Email)

Instantly map all internal URLs, perform AI-powered (ChatGPT) analysis, and deliver results in HTML via webhook, Google Sheets, or email. All from your own n8n instance!

💡 Why this workflow?

• Forget expensive tools: Run deep, visual audits replacing Screaming Frog or Ahrefs.
• Real URL mapping: Reads the sitemap, filters only internal URLs, and analyzes each one individually.
• AI-powered analysis: ChatGPT detects critical issues, recommendations, and best practices on every page.
• Error handling: The workflow includes robust error handling and guides you on what to do in each case.
• Client-ready results: Receive a professional HTML report, an email summary, or push it to Google Sheets for team collaboration.
• Automate by webhook or manually: Use it in backend integrations or trigger with a button.

🧠 What does the workflow do?

1. Automatically detects the sitemap (robots.txt → sitemap.xml).

2. Filters only internal URLs (ignores assets, images, scripts, etc).

3. Fetches the full HTML content of each URL.

4. Uses ChatGPT (GPT-4o-mini) for professional diagnostics (meta tags, headings, hreflang, Open Graph, links, duplicate content, etc).

5. Groups results (critical issues, recommendations, best practices) and presents them as:

   • 📄 Professional HTML report (ready to send/share)
   • 📊 Google Sheets (collaborative structure)
   • 🔗 Webhook or HTML email (for automation)

🛠️ Technologies / APIs Used

• n8n (self-hosted or cloud instance required)
• ChatGPT API (required, approx. cost: €0.01 per 20 URLs analyzed)
• Google Drive/Sheets API (only for Google Sheets output)
• Email SMTP/Gmail (for notifications)

⚡ Who should use it?

• SEOs and agencies needing technical reports in minutes
• Freelancers automating client SEO audits
• Web developers and growth hackers
• Website owners/businesses with multiple sites

🎯 Problems solved

• Slow, manual SEO auditing
• Dependence on expensive SaaS
• Lack of full-site coverage → every URL is checked with actionable recommendations
• Fast, visual delivery to clients (HTML “copy-paste” report and/or collaborative sheet)

📝 Quick Setup

1. Import the .json into your n8n.

2. Add your credentials:

   • OpenAI (ChatGPT) API Key
   • Google account (only for Google Sheets output)

3. Run manually or via webhook (you can pass the URL as a parameter).

4. View the results in the generated HTML, Google Sheets, or your email.

💡 Details & Tips

• Enter only the domain (e.g., example.com) — no https:// and no trailing slash.
• If any error occurs (unusual sitemap, robots blocked, etc.), the messages are explained clearly.
• You can change the analysis language (default: Spanish).
• 100% customizable and extendable for other outputs (Notion, Slack, etc).

📦 What’s included?

• 🧩 n8n workflow file → SEO n8n.json
• 📘 Quick install guide (README)
• 💬 Direct support: [email protected]
• 📸 More info and photos: [email protected]