Tools

Diagnoses website SEO issues: checks crawling and indexing, Core Web Vitals, metadata and on-page content, and gives prioritized, actionable fixes. From the marketingskills collection.

Official web auditing tool from the Google Chrome team: score pages on performance, accessibility, best practices and SEO from the command line and get HTML, JSON or CSV reports, so agents can iterate on a page. Needs Node 22+ and Chrome.

A collection of 380+ skills across engineering, product, marketing, compliance, finance and executive advisory roles, with many standard-library Python scripts. Claude Code can install them by domain as plugins; works with Codex, Gemini CLI and a dozen other agents.

SEO audit plugin covering technical SEO, E-E-A-T content quality, Schema markup, Core Web Vitals, local and e-commerce SEO, and GEO for AI search. Parallel subagents audit and return a prioritized action list. Needs Python 3.10+; Playwright optional for SPA rendering and screenshots.

SEO analysis skill pack: 26 sub-skills and 19 subagents run full-site audits in parallel, covering technical SEO, E-E-A-T content quality, Schema, AI search optimization (GEO) and local SEO. Full features require installing it as a plugin and running /seo setup.

Optimizes websites for AI search: checks whether ChatGPT, Perplexity and Google AI Overviews can cite your site, covering AI crawler access, llms.txt, structured data, E-E-A-T and technical SEO, and writes client reports. PDF reports and scoring need the README install script, Python 3.8+ and Git.

UI skills for design engineers: clean up spacing and hierarchy in AI-generated interfaces, fix accessibility and page metadata, debug janky animations, build DESIGN.md from an existing product or site, and run read-only UI reviews with fix plans. Use with a local frontend project in a coding agent.

Hands your current browser session to the agent through a Chrome extension: read console logs and network requests, take screenshots, and run Lighthouse performance, accessibility and SEO audits without signing in again.

Runs Google Lighthouse across an entire site (sampling similar pages smartly) and summarizes SEO, performance and accessibility scores page by page in a local web UI; unlighthouse-ci writes reports directly for agents to read. Great for site-wide SEO checkups. Needs Node.js 22.18+.

Fast async link checker written in Rust that scans websites and Markdown, HTML and other files for broken links and email addresses, with JSON output, config files and an official GitHub Action, often wired into docs CI.

Measurement-first audits and optimization of web quality using Lighthouse, Chrome DevTools performance traces and CrUX data, covering Core Web Vitals, WCAG 2.2 accessibility, SEO and best practices, for any frontend framework. By Addy Osmani (not an official Google project).

Builds landing pages in two halves: intake questions, page structure, layout choice, conversion copy and SEO first, then a strict visual system for fonts, Tailwind type scale, spacing, radius, backgrounds, icons and motion. The rules are opinionated, e.g. no Inter font and no background gradients.

Skills for solo founders: website SEO and AI search optimization (GEO), mining user needs from Reddit, X and GitHub, domain price comparison, Product Hunt search, and logo and banner generation. Some need API keys or tokens for Gemini, twitterapi.io, RequestHunt or Product Hunt.

Crawls an entire site, counts words and keywords per page, and checks technical SEO such as titles, meta descriptions, image alt text, H1s and social tags. Outputs JSON by default or an HTML report for agents to act on. Needs Python; the optional AI content review needs an API key.

Enter a URL and get a single-page SEO audit report in HTML: checks title and meta description, H1, robots, sitemap, structured data and more, and lists priority fixes. Needs local Python; the full audit also needs a Google PageSpeed API key.

SEO CLI and MCP server for agents: crawls your site for technical issues, uses Search Console data to rank fixes, and compares before and after. Needs Node.js 22+ and Google sign-in; keyword and competitor research needs paid data (DataForSEO, Semrush or Ahrefs).

Adobe's official Claude Code plugin for redesigning an existing website: crawls the current site, sets a design direction, builds prototypes, then migrates page by page to static HTML, checking performance, SEO and accessibility. Requires the impeccable plugin, Node 22 and Playwright.

Webflow's official MCP: manage your site's pages, CMS content and blog posts by chat, and with the MCP Bridge App in the Designer, edit page elements and styles directly. Needs a Webflow account and Node.js 22.3+; first connection asks you to authorize sites.