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SEO Schema Markup Checker

Finds, validates, and generates Schema.org JSON-LD structured data for a web page

Source Download skill
Repository
AgriciDaniel/claude-seo
Stars
25,798
Licence
MIT
Files
3 files

What it does

This skill teaches an AI agent to inspect a web page for structured data (hidden code that describes what the page is, such as a product, article, or business) and check it for errors. It flags missing fields, invalid or deprecated schema types, and relative URLs, then can write ready-to-paste JSON-LD snippets with clearly marked placeholders. It also warns against fake or undisclosed incentivized reviews.

Great for

  • SEO specialists who want to audit or add structured data to a site
  • Website owners preparing product, article, or local business pages for search engines
  • Developers implementing Schema.org markup in server-rendered HTML

Skip it if

  • Pages that have no structured data needs, since the skill is meant to be used only when structured data is requested
  • Anyone expecting guaranteed search rankings or rich results, because Google decides what it displays and the skill's status list may go out of date
  • Use on pages you do not own or are not permitted to analyse, since it fetches the page from the internet

Try asking

  • “Check the schema markup on https://example.com/product/123 and tell me what's broken”
  • “Generate Organization and LocalBusiness JSON-LD for my bakery using placeholders I can fill in”
  • “Is my FAQPage markup still useful, or should I switch to QAPage for my community Q&A?”
Step-by-step guide: how to use SEO Schema Markup CheckerInstall, first run, examples, tips and FAQs

Install in 3 steps

  1. 1

    Download the skill

    The ZIP contains the 3 original files, the MIT licence and an attribution note.

    seo-schema.zip
  2. 2

    Add it to your agent

    Claude Code (all projects)

    mkdir -p ~/.claude/skills && unzip seo-schema.zip -d ~/.claude/skills/

    Claude Code / Agent SDK (this project only)

    mkdir -p .claude/skills && unzip seo-schema.zip -d .claude/skills/

    Claude apps (web/desktop): Settings → Capabilities → Skills → Upload skill, and choose the ZIP.

  3. 3

    Ask for the task

    No special command needed — the agent reads the skill's description and loads it when your request matches. Try one of the prompts above.

Get better results

  • Provide the full URL so the agent can extract the JSON-LD from the live page source
  • Replace every bracketed placeholder in generated JSON-LD with real, verifiable data before publishing
  • Check the skill's dated deprecation notes against Google's current documentation, since they may change after the stated check date

What's inside

  • LICENSE.txt
  • references/deprecated-types-2024-2026.md
  • SKILL.md

Redistributed unmodified from AgriciDaniel/claude-seo under the MIT licence. The assessment was drafted with AI from the skill's files on 2026-10-29. Skills can instruct your agent to run code — read SKILL.md and any scripts before installing.