validate_html

MCP tool from MCP Web Validator by AKzar1el

Validate raw HTML markup already supplied in the conversation.

How to use it

validate_html is exposed by the MCP Web Validator MCP server. Add the server to your MCP client (Claude Desktop, Cursor, Windsurf and others), and the validate_html tool becomes available to the model automatically. See the full listing for setup details and every tool this server provides.

Install MCP Web Validator

$npx -y mcp-web-validator

FULL MCP WEB VALIDATOR LISTING

Other tools in MCP Web Validator (15)

audit_public_site

Run a bounded sitemap-first audit of up to eight authorized, same-origin public pages. It respects robots.txt, returns compact page coverage and deduplicated findings, and does not run site-wide link checks.

audit_public_webpage

Fetch one authorized public HTML page and run the combined HTML, SEO/accessibility-signal, and JSON-LD syntax audit. Link checks are optional.

audit_seo_metadata

Audit supplied HTML for covered on-page SEO and accessibility signals.

check_broken_links

Check up to 20 authorized public links extracted from supplied HTML.

css.local

Validate a local CSS file.

generate_validation_report

Combine the checks for supplied markup; baseurl resolves relative links but does not fetch a page.

html.local

Validate a local HTML file.

html.url

Validate the markup returned by a public URL.

links.broken

Check links extracted from supplied HTML.

report.validation

Combine HTML, optional CSS, SEO, JSON-LD, and bounded link checks in a Markdown report.

schema.markup

Parse JSON-LD blocks and report JSON syntax errors.

screenshot.capture

Capture desktop, tablet, mobile, or custom viewport screenshots.

seo.metadata

Audit titles, descriptions, canonical tags, headings, viewport metadata, image alt attributes, and Open Graph metadata.

validate_css

Parse supplied CSS for syntax errors inside the Worker.

validate_schema_markup

Check JSON-LD blocks in supplied HTML for JSON syntax errors.