Claude SEO is an open-source SEO analysis plugin for Claude Code that runs 25 sub-skills and 18 specialist agents in parallel to audit technical SEO, content quality, schema markup, AI search optimization, local SEO, e-commerce, and international SEO.
The tool addresses the need for rapid, comprehensive SEO audits grounded in primary-source guidance from Google rather than promotional claims. It works by spawning up to 15 specialist agents simultaneously to analyze different aspects of a site, completing full audits in minutes rather than hours. Each recommendation includes the first-principle observation it rests on, dependency relationships, falsifiability checks, and leading indicators, so clients can verify results independently. The approach aligns with Google's AI Optimization Guide and includes checks for AI-search readiness, schema deprecation, citability gaps, and parasite-SEO exposure that standard tools like Google Search Console and Lighthouse may miss.
The tool suits SEO agencies running multiple client sites who want to increase audit cadence from quarterly to weekly without expanding team capacity, in-house SEO leads at SaaS, publisher, or e-commerce companies seeking a second review before executive presentations, and freelance consultants who need to anchor client scope with concrete proof of value on day one. The project offers two versions: a public open-source release under MIT license for stable, downloadable use, and a private community mirror with early access to upcoming features for members of a paid community.
Development activity shows consistent engagement with the core workflow. The project maintains parallel execution as a defining capability, with full site audits spawning multiple specialist agents simultaneously. Documentation emphasizes falsifiability and testable recommendations as central to the methodology rather than promotional language. The tool includes optional integrations with DataForSEO, Firecrawl, and Banana for extended functionality, and a companion port called Codex SEO exists for users working with Codex instead of Claude Code.
