n8n SEO Audit Workflow: Gmail Report + Google Sheets

Get an instant SEO audit by email—powered by n8n, OpenAI, Gmail, and Google Sheets

This n8n SEO Audit Workflow submits a landing page URL, runs two OpenAI-powered SEO audits (technical + content/keyword), calculates an overall score with a QuickChart gauge, then emails a scannable HTML report via Gmail and logs results to Google Sheets.

What this workflow does

• Receives an audit request through an n8n Form Trigger with: landing page URL, optional target keyword, and notification email.
• Fetches the landing page HTML using HTTP and checks the HTTP status code to confirm the page is accessible.
• If the page can’t be fetched, it immediately sends a failure notification via Gmail including the status code and URL.
• If accessible, generates a structured Technical SEO audit using OpenAI (score, critical issues, quick wins, opportunities) based on the raw HTML.
• In parallel, generates a structured Content & Keyword SEO audit using OpenAI (score, keyword usage, readability, recommendations) based on the same HTML and the provided keyword.
• Averages both scores into an overall score and creates a QuickChart gauge image for the report.
• Composes and emails a formatted HTML report using OpenAI, then appends audit details to Google Sheets.

Use cases

• Run SEO checks for new landing pages submitted by marketing teams using an n8n Form.
• Automate recurring SEO evaluations for SaaS product pages and send stakeholders a Gmail report.
• Track technical and content SEO improvements over time by logging results into Google Sheets.

Technical details

• Integrations/Nodes: n8n Form Trigger, HTTP (fetch HTML), if, set, code, merge, gmail, Google Sheets (append), and QuickChart gauge generation.
• AI: OpenAI-powered technical and content/keyword audits; workflow default model ID is gpt-5-mini (confirm it’s available in your account).
• Email: Gmail OAuth2 credential required.

Category: n8n automation workflow for SEO audits. Perfect for n8n users, automation engineers, and SaaS operators who want reliable, repeatable SEO reporting.