Build Automated SEO Audits with a Free API -- No Ahrefs Subscription Needed

Build Automated SEO Audits with a Free API -- No Ahrefs Subscription Needed Published on: Dev.to Tags: seo, api, webdev, javascript Canonical URL: (set after publishing) Want to add SEO auditing to your app, CI/CD pipeline, or Chrome extension? Ahrefs charges $99+/month and Moz API requires a similar subscription. Here's a free alternative that returns a weighted SEO score (0-100) with 19 on-page checks. What It Analyzes (19 Checks) Title tag (length, presence, optimal range 30-60 chars) Meta description (length, optimal range 120-160 chars) Heading structure (H1-H6 counts) Image alt text coverage Internal and external links Canonical URL Robots meta directives Open Graph tags Twitter Card tags JSON-LD structured data Word count, page size, language, viewport, favicon, hreflang All checks are weighted and combined into a 0-100 SEO score. Quick Start curl "https://seo-analyzer-api.p.rapidapi.com/analyze?url=https://dev.to" \ -H "X-RapidAPI-Key: YOUR_KEY" \ -H "X-RapidAPI-Host: seo-analy