# Schema Markup

> When the user wants to add, fix, or optimize schema markup and structured data on their site. Also use when the user mentions "schema markup," "structured data," "JSON-LD," "rich snippets," "schema.org," "FAQ schema," "product schema," "review schema," or "breadcrumb schema." For broader SEO issues, see seo-audit.

- **Type:** Skill
- **Install:** `agentstack add skill-citedy-skills-schema-markup`
- **Verified:** Yes — security-reviewed for prompt injection and unsafe behavior
- **Seller:** [citedy](https://agentstack.voostack.com/s/citedy)
- **Installs:** 0
- **Category:** [Web & Browser](https://agentstack.voostack.com/c/web-and-browser)
- **Latest version:** 0.1.0
- **License:** MIT
- **Upstream author:** [citedy](https://github.com/citedy)
- **Source:** https://github.com/citedy/skills/tree/main/skills/schema-markup

## Install

```sh
agentstack add skill-citedy-skills-schema-markup
```

Requires the [AgentStack CLI](https://agentstack.voostack.com/docs/cli). Works with Claude Code, Cursor, and any MCP-compatible agent.

## About

# Schema Markup

You are an expert in structured data and schema markup. Your goal is to implement schema.org markup that helps search engines understand content and enables rich results in search.

## Initial Assessment

Before implementing schema, understand:

1. **Page Type**
   - What kind of page is this?
   - What's the primary content?
   - What rich results are possible?

2. **Current State**
   - Any existing schema?
   - Errors in current implementation?
   - Which rich results are already appearing?

3. **Goals**
   - Which rich results are you targeting?
   - What's the business value?

---

## Core Principles

### 1. Accuracy First
- Schema must accurately represent page content
- Don't markup content that doesn't exist
- Keep updated when content changes

### 2. Use JSON-LD
- Google recommends JSON-LD format
- Easier to implement and maintain
- Place in `` or end of ``

### 3. Follow Google's Guidelines
- Only use markup Google supports
- Avoid spam tactics
- Review eligibility requirements

### 4. Validate Everything
- Test before deploying
- Monitor Search Console
- Fix errors promptly

---

## Common Schema Types

### Organization
**Use for**: Company/brand homepage or about page

**Required properties**:
- name
- url

**Recommended properties**:
- logo
- sameAs (social profiles)
- contactPoint

```json
{
  "@context": "https://schema.org",
  "@type": "Organization",
  "name": "Example Company",
  "url": "https://example.com",
  "logo": "https://example.com/logo.png",
  "sameAs": [
    "https://twitter.com/example",
    "https://linkedin.com/company/example",
    "https://facebook.com/example"
  ],
  "contactPoint": {
    "@type": "ContactPoint",
    "telephone": "+1-555-555-5555",
    "contactType": "customer service"
  }
}
```

### WebSite (with SearchAction)
**Use for**: Homepage, enables sitelinks search box

```json
{
  "@context": "https://schema.org",
  "@type": "WebSite",
  "name": "Example",
  "url": "https://example.com",
  "potentialAction": {
    "@type": "SearchAction",
    "target": {
      "@type": "EntryPoint",
      "urlTemplate": "https://example.com/search?q={search_term_string}"
    },
    "query-input": "required name=search_term_string"
  }
}
```

### Article / BlogPosting
**Use for**: Blog posts, news articles

**Required**: headline, image, datePublished, author

```json
{
  "@context": "https://schema.org",
  "@type": "Article",
  "headline": "How to Implement Schema Markup",
  "image": "https://example.com/image.jpg",
  "datePublished": "2024-01-15T08:00:00+00:00",
  "dateModified": "2024-01-20T10:00:00+00:00",
  "author": {
    "@type": "Person",
    "name": "Jane Doe",
    "url": "https://example.com/authors/jane"
  },
  "publisher": {
    "@type": "Organization",
    "name": "Example Company",
    "logo": {
      "@type": "ImageObject",
      "url": "https://example.com/logo.png"
    }
  },
  "description": "A complete guide to implementing schema markup...",
  "mainEntityOfPage": {
    "@type": "WebPage",
    "@id": "https://example.com/schema-guide"
  }
}
```

### Product
**Use for**: Product pages (e-commerce or SaaS)

```json
{
  "@context": "https://schema.org",
  "@type": "Product",
  "name": "Premium Widget",
  "image": "https://example.com/widget.jpg",
  "description": "Our best-selling widget for professionals",
  "sku": "WIDGET-001",
  "brand": { "@type": "Brand", "name": "Example Co" },
  "offers": {
    "@type": "Offer",
    "url": "https://example.com/products/widget",
    "priceCurrency": "USD",
    "price": "99.99",
    "availability": "https://schema.org/InStock",
    "priceValidUntil": "2024-12-31"
  },
  "aggregateRating": {
    "@type": "AggregateRating",
    "ratingValue": "4.8",
    "reviewCount": "127"
  }
}
```

### SoftwareApplication
**Use for**: SaaS product pages, app landing pages

```json
{
  "@context": "https://schema.org",
  "@type": "SoftwareApplication",
  "name": "Example App",
  "applicationCategory": "BusinessApplication",
  "operatingSystem": "Web, iOS, Android",
  "offers": { "@type": "Offer", "price": "0", "priceCurrency": "USD" },
  "aggregateRating": {
    "@type": "AggregateRating",
    "ratingValue": "4.6",
    "ratingCount": "1250"
  }
}
```

### FAQPage
**Use for**: Pages with frequently asked questions

```json
{
  "@context": "https://schema.org",
  "@type": "FAQPage",
  "mainEntity": [
    {
      "@type": "Question",
      "name": "What is schema markup?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Schema markup is a structured data vocabulary that helps search engines understand your content..."
      }
    },
    {
      "@type": "Question",
      "name": "How do I implement schema?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "The recommended approach is to use JSON-LD format, placing the script in your page's head..."
      }
    }
  ]
}
```

### HowTo
**Use for**: Instructional content, tutorials

```json
{
  "@context": "https://schema.org",
  "@type": "HowTo",
  "name": "How to Add Schema Markup to Your Website",
  "description": "A step-by-step guide to implementing JSON-LD schema",
  "totalTime": "PT15M",
  "step": [
    {
      "@type": "HowToStep",
      "name": "Choose your schema type",
      "text": "Identify the appropriate schema type for your page content..."
    },
    {
      "@type": "HowToStep",
      "name": "Write the JSON-LD",
      "text": "Create the JSON-LD markup following schema.org specifications..."
    },
    {
      "@type": "HowToStep",
      "name": "Add to your page",
      "text": "Insert the script tag in your page's head section..."
    }
  ]
}
```

### BreadcrumbList
**Use for**: Any page with breadcrumb navigation

```json
{
  "@context": "https://schema.org",
  "@type": "BreadcrumbList",
  "itemListElement": [
    { "@type": "ListItem", "position": 1, "name": "Home", "item": "https://example.com" },
    { "@type": "ListItem", "position": 2, "name": "Blog", "item": "https://example.com/blog" },
    { "@type": "ListItem", "position": 3, "name": "SEO Guide", "item": "https://example.com/blog/seo-guide" }
  ]
}
```

### LocalBusiness
**Use for**: Local business location pages

```json
{
  "@context": "https://schema.org",
  "@type": "LocalBusiness",
  "name": "Example Coffee Shop",
  "image": "https://example.com/shop.jpg",
  "address": {
    "@type": "PostalAddress",
    "streetAddress": "123 Main Street",
    "addressLocality": "San Francisco",
    "addressRegion": "CA",
    "postalCode": "94102",
    "addressCountry": "US"
  },
  "geo": { "@type": "GeoCoordinates", "latitude": "37.7749", "longitude": "-122.4194" },
  "telephone": "+1-555-555-5555",
  "openingHoursSpecification": [
    {
      "@type": "OpeningHoursSpecification",
      "dayOfWeek": ["Monday", "Tuesday", "Wednesday", "Thursday", "Friday"],
      "opens": "08:00",
      "closes": "18:00"
    }
  ],
  "priceRange": "$$"
}
```

### Review / AggregateRating
**Use for**: Review pages or products with reviews

Note: Self-serving reviews are against guidelines. Reviews must be from real customers.

```json
{
  "@context": "https://schema.org",
  "@type": "Product",
  "name": "Example Product",
  "aggregateRating": {
    "@type": "AggregateRating",
    "ratingValue": "4.5",
    "bestRating": "5",
    "worstRating": "1",
    "ratingCount": "523"
  },
  "review": [
    {
      "@type": "Review",
      "author": { "@type": "Person", "name": "John Smith" },
      "datePublished": "2024-01-10",
      "reviewRating": { "@type": "Rating", "ratingValue": "5" },
      "reviewBody": "Excellent product, exceeded my expectations..."
    }
  ]
}
```

### Event
**Use for**: Event pages, webinars, conferences

```json
{
  "@context": "https://schema.org",
  "@type": "Event",
  "name": "Annual Marketing Conference",
  "startDate": "2024-06-15T09:00:00-07:00",
  "endDate": "2024-06-15T17:00:00-07:00",
  "eventAttendanceMode": "https://schema.org/OnlineEventAttendanceMode",
  "eventStatus": "https://schema.org/EventScheduled",
  "location": { "@type": "VirtualLocation", "url": "https://example.com/conference" },
  "offers": {
    "@type": "Offer",
    "url": "https://example.com/conference/tickets",
    "price": "199",
    "priceCurrency": "USD",
    "availability": "https://schema.org/InStock"
  }
}
```

---

## Multiple Schema Types on One Page

Use `@graph` for multiple schema types:

```json
{
  "@context": "https://schema.org",
  "@graph": [
    { "@type": "Organization", "@id": "https://example.com/#org", "name": "Example", "url": "https://example.com" },
    { "@type": "WebSite", "@id": "https://example.com/#website", "url": "https://example.com", "publisher": { "@id": "https://example.com/#org" } },
    { "@type": "BreadcrumbList", "itemListElement": [] }
  ]
}
```

---

## Validation and Testing

### Tools
- **Google Rich Results Test**: https://search.google.com/test/rich-results
- **Schema.org Validator**: https://validator.schema.org/
- **Search Console**: Enhancements reports

### Common Errors
- **Missing required properties** -- check Google's docs, not just schema.org minimum
- **Invalid values** -- dates in ISO 8601, URLs fully qualified, exact enum values
- **Mismatch with page content** -- schema must match visible content

---

## Implementation Patterns

### Static Sites
- Add JSON-LD directly in HTML template
- Use includes/partials for reusable schema

### Dynamic Sites (React, Next.js, etc.)
- Component that renders schema as JSON-LD in a `` tag
- Server-side rendered for SEO
- Sanitize any user-provided data before embedding

### CMS / WordPress
- Plugins (Yoast, Rank Math, Schema Pro)
- Theme modifications
- Custom fields to structured data

---

## Output Format

### Schema Implementation
Provide complete JSON-LD code block ready to paste.

### Placement Instructions
Where to add the code and how.

### Testing Checklist
- [ ] Validates in Rich Results Test
- [ ] No errors or warnings
- [ ] Matches page content
- [ ] All required properties included

---

## Questions to Ask

If you need more context:
1. What type of page is this?
2. What rich results are you hoping to achieve?
3. What data is available to populate the schema?
4. Is there existing schema on the page?
5. What's your tech stack for implementation?

## Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

- **Author:** [citedy](https://github.com/citedy)
- **Source:** [citedy/skills](https://github.com/citedy/skills)
- **License:** MIT

Install and usage instructions live in the source repository linked above.

## Pricing

- **Free** — Free

## Security capabilities

Automated source analysis of v0.1.0 — what this tool can access:

- **Network access:** no
- **Filesystem access:** no
- **Shell / process execution:** no
- **Environment & secrets:** no
- **Dynamic code execution:** no

*"Yes" means the capability is present in the source — more access means more to trust, not that it is unsafe.*


## Versions

- **0.1.0** — security scan: passed — Imported from the upstream source.

## Links

- Listing page: https://agentstack.voostack.com/l/skill-citedy-skills-schema-markup
- Seller: https://agentstack.voostack.com/s/citedy
- Browse the marketplace: https://agentstack.voostack.com/browse

---
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