LLM SEO Audit with Technical & Content Analysis via Email

This workflow automates SEO audits for websites, replacing manual reviews using tools like Screaming Frog that take 2-4 hours per site for marketing teams. The SEO Audit Form FormTrigger node collects URL and email, the URL Validator If node checks format, the Website Scraper HTTP Request node fetches HTML, the Scrape Error Handler If node verifies access, the Technical AI Model/Content AI Model LangChain LM Chat OpenAI nodes analyze technical/content aspects with GPT-4o-mini, the Technical SEO Auditor/Content SEO Auditor LangChain Agent nodes provide structured insights, the Audit Merger Merge node combines results, the Report Aggregator Aggregate node organizes findings, the Report Formatter Set node creates markdown reports, the HTML Converter Markdown node formats for email, and the Email Delivery Gmail node sends branded PDFs. Error paths (If/Respond to Webhook nodes) handle failures. It helps marketing teams in small agencies (20-50 staff) auditing 10+ sites monthly, identifying issues like missing meta tags or poor readability to boost rankings without expertise.\n\nThis workflow saves 8-12 hours weekly on 10 audits, improving accuracy by 80%. Use cases include e-commerce optimization, agency client reports for digital marketing firms. Suitable for small teams. Requires OpenAI ($0.03/1k tokens), Gmail (free), n8n ($20/month cloud). Scalable to 50 audits/month with paid tiers.\n\nInstall n8n from n8n.io or cloud.n8n.io. Get OpenAI API key at platform.openai.com (enable billing, set OPENAI_API_KEY env var). Configure Gmail OAuth at console.cloud.google.com. Import JSON, update SEO Audit Form FormTrigger node with fields (website_url, email_address). Set webhook auto-generated. Configure AI nodes with 'gpt-4o-mini' model.\n\nTest with form submission: website_url 'example.com', email 'test@email.com'. Verify email report. Errors: Invalid URL (400 response), scrape fail (422), OpenAI key invalid (regenerate). Activate workflow. Monitor dashboard weekly. Optimize by caching scrapes; refresh keys quarterly.", "businessValue": "Saves 8-12 hours/week on 10 SEO audits", "setupTime": "30-45 minutes", "difficulty": "Intermediate", "requirements": ["OpenAI API ($0.03/1k tokens)", "Gmail API (free)", "n8n instance"], "useCase": "Automated AI-driven SEO audits for websites"