---
title: Validate HTML API
slug: validate-html
url: https://apyverse.com/chisleroff/service/validate-html
provider: Website Intelligence
categories: [Developer Tools, SEO]
tags: [html-validation, structured-data, schema-org, json-ld, seo-audit, microdata]
auth: api_key
---

# Validate HTML API

Validate raw HTML for structured data and get JSON-LD, microdata, meta tags, Open Graph, Twitter card, and a validation summary.

## Endpoints

| Method | Path | Description | Atoms |
| --- | --- | --- | --- |
| POST | `websiteintelligence/seo/validate-html` | What it does Validates the HTML you submit in the request body for structured data-related content… | 50 |

## About

## What it does
HTML Validator checks raw HTML for structured data and returns a parsed view of what it finds. Send the `html` field in the request body, and get back validation results you can inspect programmatically.

The response includes the source `url` when available, extracted `json_ld`, `microdata`, and metadata objects such as `meta_tags`, `open_graph`, and `twitter_card`. It also returns a `summary` object with `warnings`, `critical_errors`, `overall_score`, `total_entities`, `types_found`, and `rich_results_eligible` so you can quickly see whether a page is ready for search features that depend on structured data.

Use HTML Validator when you need to audit a page template, check a CMS output, or verify that product pages, articles, or organization pages expose the markup search engines expect. It is useful for QA pipelines, SEO checks, and content workflows where structured data issues need to be caught before deployment.

If your pages rely on schema markup, this service gives you the inspection data you need without parsing HTML yourself.

## Usage

Authenticate with an ApyHub API key in the `apy-token` header.
Full docs and a live playground: https://apyverse.com/chisleroff/service/validate-html