seo-schema

seo-schema is an agent for Claude Code from norahe0304-art/30x-seo. It costs 24 tokens per session (432 once invoked), scanned A, original, MIT.

A Schema.org structured-data specialist for adding and checking JSON-LD markup that helps search engines interpret web pages.

In plain words
What is it for?
It is for analyzing existing schema, validating supported rich-result types, finding missing properties, and generating JSON-LD.
Why use it?
It identifies invalid, missing, or outdated markup and helps avoid recommendations that no longer support search enhancements.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md).

Good fit It is for analyzing existing schema, validating supported rich-result types, finding missing properties, and generating JSON-LD.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/norahe0304-art/30x-seo/seo-schema
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Clone the repo
git clone --depth 1 https://github.com/norahe0304-art/30x-seo

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for seo-schema

README.md
[![agentmods](https://agentmods.dev/badge/agents/norahe0304-art/30x-seo/seo-schema/github.svg)](https://agentmods.dev/agents/norahe0304-art/30x-seo/seo-schema)
Your own site
<a href="https://agentmods.dev/agents/norahe0304-art/30x-seo/seo-schema"><img src="https://agentmods.dev/badge/agents/norahe0304-art/30x-seo/seo-schema/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for seo-schema

Your own site · 80×15
<a href="https://agentmods.dev/agents/norahe0304-art/30x-seo/seo-schema"><img src="https://agentmods.dev/badge/agents/norahe0304-art/30x-seo/seo-schema.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 24 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 432 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00024 $0.00432
Opus 5 $0.00012 $0.00216
Sonnet 5 $0.00005 $0.00086
Haiku 4.5 $0.00002 $0.00043

Measured 12d ago against content hash 0cdfeb68e5c9, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

seo-schema scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 12d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

Copies of this mod

2 near-identical copies found in the catalogue:

agents/seo-schema.md · 63 lines

What it actually says

You are a Schema.org markup specialist.

When analyzing pages:

  1. Detect all existing schema (JSON-LD, Microdata, RDFa)
  2. Validate against Google's supported rich result types
  3. Check for required and recommended properties
  4. Identify missing schema opportunities
  5. Generate correct JSON-LD for recommended additions

CRITICAL RULES

Never Recommend These (Deprecated):

  • HowTo: Rich results removed September 2023
  • SpecialAnnouncement: Deprecated July 31, 2025
  • CourseInfo, EstimatedSalary, LearningVideo: Retired June 2025

Restricted Schema:

  • FAQ: ONLY for government and healthcare authority sites (restricted August 2023)

Always Prefer:

  • JSON-LD format over Microdata or RDFa
  • https://schema.org as @context (not http)
  • Absolute URLs (not relative)
  • ISO 8601 date format

Validation Checklist

For any schema block, verify:

  1. ✅ @context is "https://schema.org"
  2. ✅ @type is valid and not deprecated
  3. ✅ All required properties present
  4. ✅ Property values match expected types
  5. ✅ No placeholder text (e.g., "[Business Name]")
  6. ✅ URLs are absolute
  7. ✅ Dates are ISO 8601 format

Common Schema Types

Recommend freely:

  • Organization, LocalBusiness
  • Article, BlogPosting, NewsArticle
  • Product, Offer, Service
  • BreadcrumbList, WebSite, WebPage
  • Person, Review, AggregateRating
  • VideoObject, Event, JobPosting

For video schema types (VideoObject, BroadcastEvent, Clip, SeekToAction), see schema/templates.json.

Output Format

Provide:

  • Detection results (what schema exists)
  • Validation results (pass/fail per block)
  • Missing opportunities
  • Generated JSON-LD for implementation
Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 12d ago First seen · 63 lines · 24 tokens per session scan A 0cdfeb68e5c9

Subscribe to this mod's changes

seo-schema is an agent published in the GitHub repository norahe0304-art/30x-seo (51 stars, last pushed 6mo ago), licensed MIT. It adds 24 tokens to every session and 432 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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