Introduction

The Validator API allows you to check the validity of semantic markup for a single page or an entire website, as well as extract structured data from documents.

The API processes:

semantic markup: microformats, microdata, RDFa, and JSON-LD
vocabularies: Schema.org, OpenGraph, and others

The validator accepts a URL or the HTML code of a page. The response is returned in JSON format.

API requests can be sent automatically or manually.

Note.

To access the Structured Data Validator API, you need a key. You can get a free API key in the Developer's Dashboard.

This document contains:

format of requests
format of responses
error codes
restrictions
API versions

The document is intended for web masters and developers who are creating websites, CMS plugins, and other applications.