seo-schema

seo-schema is an agent for Claude Code from buithang3058/Agentic-SEO. It costs 24 tokens per session (1,091 once invoked), scanned A, a copy of seo-schema, MIT.

A tool for finding, checking, and creating Schema.org structured data in JSON-LD, Microdata, or RDFa. Structured data is machine-readable page information that can help search engines understand content.

In plain words
What is it for?
Use it to inspect existing markup, check required and recommended fields, review entity links, validate edited files, and generate JSON-LD for suitable additions.
Why use it?
It helps detect invalid or incomplete markup and avoids recommending schema types that search engines no longer support.

Agent for Claude Code

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

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.

agentmods
npx agentmods add agents/buithang3058/agentic-seo/seo-schema
Clone the repo
git clone --depth 1 https://github.com/buithang3058/Agentic-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/buithang3058/agentic-seo/seo-schema.svg)](https://agentmods.dev/agents/buithang3058/agentic-seo/seo-schema)
Your own site
<a href="https://agentmods.dev/agents/buithang3058/agentic-seo/seo-schema"><img src="https://agentmods.dev/badge/agents/buithang3058/agentic-seo/seo-schema.svg" alt="Measured on agentmods" 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 1,091 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin 100% copy Near-identical to another mod 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 $0.01091
Opus 5 $0.00012 $0.00545
Sonnet 5 $0.00005 $0.00218
Haiku 4.5 $0.00002 $0.00109

Measured 6d ago against content hash 91c8b7b3f587, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, 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 6d 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

This is a copy

100% identical to seo-schema — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

resources/agents/seo-schema.md · 122 lines

How it starts

The opening of the file, as written. The whole thing — 122 lines — stays where its author put it; the contents beside it link to each section on GitHub.

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

Available Scripts

Script Purpose Command
parse_html.py Extract JSON-LD blocks + validate types python3 parse_html.py --url <url> --json
validate_schema.py Post-edit validation (pre-commit) python3 validate_schema.py <file>
entity_checker.py Entity sameAs and KG presence python3 entity_checker.py <url> --json

CRITICAL RULES

Never Recommend — Deprecated Schema Types

Type Status Date
HowTo Rich results removed September 2023
SpecialAnnouncement Deprecated July 31, 2025
CourseInfo Retired June 2025
EstimatedSalary Retired June 2025
LearningVideo Retired June 2025
ClaimReview Retired (fact-check discontinued) June 2025
VehicleListing Retired June 2025

Restricted Schema

Type Restriction
FAQPage Government and healthcare authority sites only (Aug 2023)
QAPage Sites with user-generated Q&A only

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/retired
  3. ✅ All required properties present for the type
  4. ✅ Property values match expected types (string, URL, Date)
  5. ✅ No placeholder text (e.g., [Business Name], [INSERT])
  6. ✅ URLs are absolute
  7. ✅ Dates are ISO 8601
  8. sameAs URLs are valid and relevant

Active Schema Types — Quick Reference

Recommended Freely

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

Read the full file on GitHub · 122 lines

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. 6d ago First seen · 122 lines · 24 tokens per session scan A 91c8b7b3f587

Subscribe to this mod's changes

seo-schema is an agent published in the GitHub repository buithang3058/Agentic-SEO (2 stars, last pushed 4mo ago), licensed MIT. It adds 24 tokens to every session and 1,091 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to seo-schema, differing in 0 lines, and is treated as a copy.