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Run a 10-point SEO audit and HTML report via webhook and HTTP request

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Created by: Denis || worknull
Denis

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Last update 2 days ago

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Quick overview

This workflow exposes a GET webhook that accepts a website URL, fetches the page, runs a 10-point SEO checklist with a score out of 100, and returns a ready-to-share HTML audit report in the webhook response.

How it works

  1. Receives a GET webhook request on the site-check endpoint with a url query parameter.
  2. Validates and normalizes the input to allow only public domain URLs (no IPs, localhost, or internal TLDs).
  3. Fetches the target page via an HTTP request using a custom User-Agent and an 8-second timeout.
  4. Parses the returned HTML to evaluate 10 checks (reachability/response time, HTTPS, title length, meta description, viewport tag, single H1, image alt text coverage, Open Graph image, HTML lang attribute, and page size) and computes a score out of 100.
  5. Builds a simple HTML report summarizing the score and pass/fail results for each check.
  6. Responds to the webhook with the generated HTML report and a text/html content type.

Setup

  1. Activate the workflow and copy the production webhook URL for the site-check endpoint.
  2. Call the webhook with ?url=yourdomain.com (or ?url=https://yourdomain.com) and ensure the target site is publicly reachable from your n8n instance.
  3. Optionally adjust the scoring thresholds, checks, timeout, and User-Agent in the workflow code and HTTP request configuration to match your audit criteria.

Requirements

  • An n8n instance (Cloud or self-hosted). No credentials or API keys are needed.

Customization

  • Change thresholds or add checks in the "Audit & build report" Code node, send the report by email with a Gmail node, or log every checked domain in Google Sheets to collect leads.

Additional info

Live example: https://worknull.app.n8n.cloud/webhook/site-check?url=n8n.io