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AKzar1el/mcp-web-validator

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W3C HTML/CSS Validator and Technical SEO Audit MCP Server. Part of the DigestSEO (https://digestseo.com) suite.

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MCP

AKzar1el/mcp-web-validator

Added 3 Sept 2026

#accessibility#css-validator#developer-tools#html-validator#mcp#model-context-protocol#seo-audit#w3c
Catalogue record, not a reviewed recommendation. This record can include automatically collected descriptions and setup details. Confirm important claims with the original source. Explore source-reviewed tools.

Overview

An MCP server for W3C HTML/CSS validation and technical SEO audits, built in TypeScript as part of the DigestSEO suite. It provides tools to validate web pages against W3C standards and perform SEO checks via the Model Context Protocol.

Best for

Best for
Developers building MCP-based tools who need quick W3C validation and SEO audit capabilities.

Use cases

  • Integrate W3C validation into MCP-enabled coding tools
  • Run technical SEO audits on web pages from a chat interface
  • Automate HTML/CSS compliance checking in development workflows

How to use

Install

npx -y mcp-web-validator

Tools exposed

  • audit_public_webpage
  • audit_public_site
  • validate_html
  • validate_css
  • audit_seo_metadata
  • validate_schema_markup
  • check_broken_links
  • generate_validation_report

Clients listed in this record (not verified here)

Claude Desktop, Cursor, ChatGPT

Notes

7 stars on GitHub. Last updated 2026-09-01. Licensed MIT.

Pros

  • Leverages authoritative W3C validation standards
  • TypeScript codebase fits well into Node.js ecosystems
  • Part of a broader SEO tooling suite (DigestSEO)

Cons

  • Very low adoption (7 stars) suggests early-stage maturity
  • Limited documentation available in the public repository
  • Requires an MCP client to be useful, adding integration overhead
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