# Schema.org

**Canonical:** https://apis.io/providers/schema-org/  
**Website:** https://schema.org/  
**APIs profiled:** 4

Schema.org is a collaborative, community-driven project that creates and maintains a shared vocabulary for structured data on the web. Founded by Google, Microsoft, Yahoo, and Yandex in 2011, it provides types and properties that developers and webmasters use to annotate content in formats like JSON-LD, RDFa, and Microdata, enabling search engines and applications to better understand web content. The vocabulary currently consists of 800+ Types, 1500+ Properties, and covers domains including commerce, healthcare, organizations, events, creative works, and more. The Schema.org WebAPI type provides a standardized vocabulary for describing APIs in structured data.

## Kin Score — 31.9 / 100 (thin)

Scored 2026-08-21 under rubric 0.12.0. Trend: flat (+0.0 from 31.9).

| Facet | Score |
|---|---|
| Discoverability | 81.5 |
| Contract Quality | 15.5 |
| Governance | 43.2 |
| Contract Governance | 43.2 |
| Operational Transparency | 26.3 |
| Developer Ergonomics | 38.1 |
| Commercial Clarity | 18.4 |
| Access Clarity | 18.4 |

## Agent readiness — 3.0 (human-only)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | no |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Freemium — onboarding: unknown, pricing: freemium, trial: no (confidence: medium).

## APIs (4)

- **Schema.org Vocabulary** — Schema.org is a collaborative, community-driven vocabulary for structured data on the internet. It provides a collection of shared vocabularies that webmasters and developers ca...
- **Schema.org JSON-LD Context** — The Schema.org JSON-LD Context provides the canonical JSON-LD context file for the Schema.org vocabulary. This context file maps Schema.org terms to their full IRIs, enabling JS...
- **Schema.org Markup Validator** — The Schema.org Markup Validator tests and validates structured data markup against the Schema.org vocabulary. It supports JSON-LD, Microdata, and RDFa formats and helps ensure s...
- **Schema.org WebAPI Type** — The Schema.org WebAPI type defines a Web API accessible over Web and Internet technologies. It provides standardized properties for describing APIs including documentation URL, ...

## Security (1)

- **Schema Org Domain Security** — TLSv1.3 · DMARC

## Plans (1)

- **Schema Org Plans Pricing**

## Tags

Schema.org, Structured Data, Linked Data, JSON-LD, Vocabulary, SEO, Web Standards, RDF, Ontology

---

Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/schema-org/). Scores are computed from the provider's own public artifacts under a published rubric.