SEO Score API

SEO Score API audits a web page with one request and returns the result as JSON: an overall score from 0 to 100, a letter grade, a score for each category, and the fixes to make first. Every fix comes with a severity, a plain-English explanation and who should handle it (developer, content or marketing). Each audit runs 80+ checks covering on-page SEO, technical SEO, social tags, performance, accessibility and structured data. It also scores how well AI assistants and answer engines can read and reuse the page. Separate endpoints cover WCAG 2.1 AA accessibility audits, AI search visibility, site crawls, backlinks and score monitoring over time. It is built to live in your code, not in a dashboard. There are Python and Node SDKs, a GitHub Action that fails a build when the score drops, an n8n node, an MCP server for Claude and Cursor, and an Apify Actor. Every check we run is published, so you can see exactly what is being scored. The free plan gives 2 audits a day with no credit card. Paid plans start at $5 a month for 200 audits and go up to 25,000 a month. Built and run by one developer in the Midwest. Questions go to a person, not a ticket queue.