Web Validator by DigestSEO MCP Server

An MCP server for HTML and CSS validation, technical SEO and accessibility checks, JSON-LD syntax validation, broken-link checks, and responsive screenshots. It is part of the DigestSEO suite of open-source SEO tools. Its 8 documented tools cover html, local.

People who work with html and local and want it reachable from Claude, Cursor, VS Code, or another MCP client. The project is written in TypeScript.

VERIFIED ACTIVE

LAST COMMIT 2026-09-29 · ★ 7 · #41 OF 998 MAINTAINED OTHER · VERIFIED 2026-09-30

MIT · TypeScript servers · how we verify → /methodology

01 · Install Web Validator by DigestSEO

Claude Code

claude mcp add akzar1el-mcp-web-validator --transport http https://web-validator-mcp.digestseo.com/mcp

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "akzar1el-mcp-web-validator": {
      "url": "https://web-validator-mcp.digestseo.com/mcp"
    }
  }
}

Same JSON for Cursor. For VS Code, rename the top-level key from `mcpServers` to `servers`.

Using another client? Same JSON, different key

Claude Desktop · mcpServers

Cursor · mcpServers

VS Code · servers

Windsurf · mcpServers

Zed · context_servers

Cline · mcpServers

Roo Code · mcpServers

Continue · mcpServers

LibreChat · mcpServers

Gemini CLI · mcpServers

Codex CLI · mcp_servers

Full setup guides: every client.

02 · Evidence

https://web-validator-mcp.digestseo.com/mcp

transport: streamable-http

endpoint alive - responded to MCP initialize · probed 2026-09-30

Security posture

What to check before giving this server access to your agent - from the registry, GitHub, and our own probes. We don't score safety; we show what's verifiable.

runs as local process (stdio) - runs on your machine with your user's permissions · remote - your agent's requests go to web-validator-mcp.digestseo.com

endpoint auth accepted our unauthenticated MCP initialize - no credentials needed to connect

license MIT - declared in the repository

npm package mcp-web-validator - unscoped; check the name against the project README before installing

registry namespace io.github.AKzar1el is GitHub-verified and matches the repo owner

03 · What Web Validator by DigestSEO can do

Prose above is summarized from the project's README and registry record - no invented capabilities.

What you can build

With this server connected, an agent can validate a local HTML or XHTML file, validate the markup returned by a public URL, validate a local CSS file, and check links extracted from supplied HTML.

Capability map

Tools grouped from the project's README - what Web Validator by DigestSEO lets an agent do.

Html

2 tools - e.g. Validate a local HTML or XHTML file.; Validate the markup returned by a public URL.

html.local · html.url

Css

1 tool - e.g. Validate a local CSS file.

css.local

Seo

1 tool - e.g. Audit titles, descriptions, canonical tags, robots noindex directives, headings, viewport metadata, image alt attributes, and Open Graph metadata.

seo.metadata

Links

1 tool - e.g. Check links extracted from supplied HTML.

links.broken

Schema

1 tool - e.g. Parse JSON-LD blocks and report JSON syntax errors.

schema.markup

Report

1 tool - e.g. Combine HTML/XHTML, optional CSS, SEO, JSON-LD, and bounded link checks in a Markdown report.

report.validation

Screenshot

1 tool - e.g. Capture desktop, tablet, mobile, or custom viewport screenshots.

screenshot.capture

Latest releases

v1.3.42 · 2026-09-24

Fixed · Decode local CSS files using BOM / exact leading @charset semantics before W3C Jigsaw validation and report analysis. · Honor a direct non-empty aria-label on elements referenced by aria-labelledby for bounded…

v1.3.41 · 2026-09-24

Fixed · Require usable accessible names for exposed iframes while preserving bounded hidden, decorative, and negative-tabindex exclusions. · Respect a leading HTML byte-order mark over a conflicting supported HTTP…

v1.3.40 · 2026-09-24

Fixed · Apply documented viewport value translations when auditing zoom restrictions, catching additional user-scalable and maximum-scale values that prevent or cap zoom while preserving safe negative/device keyword…

04 · Who maintains Web Validator by DigestSEO

Web Validator by DigestSEO is maintained by akzar1el. We track 5 MCP servers from akzar1el - 5 actively maintained, 18 combined GitHub stars, oldest repo from Mar 2026. Full record: all servers from akzar1el.

Google News & Trends MCP Query Google News RSS feeds and search interest over time via Google Trends. ★ 5

05 · Facts

repository: github.com/akzar1el/mcp-web-validator
website: https://digestseo.com/validator-mcp/
category: other - ranked #41 of 998 actively-maintained other servers as of 2026-09-30.
release cadence: 10+ releases in the last 90 days (latest 2026-09-24)
registry: io.github.AKzar1el/mcp-web-validator (active, first published 2026-07-11 · 44 versions)
packages: npm:mcp-web-validator

06 · Web Validator by DigestSEO FAQ

Is Web Validator by DigestSEO still maintained?

Yes - as of 2026-09-30, its last commit was 2026-09-29 and it shipped 10+ releases in the last 90 days. We re-verify nightly.

What can Web Validator by DigestSEO do?

With this server connected, an agent can validate a local HTML or XHTML file, validate the markup returned by a public URL, validate a local CSS file, and check links extracted from supplied HTML.

How do I install Web Validator by DigestSEO?

Run `npx -y mcp-web-validator`. You can also paste the ready-made client config above.

Does Web Validator by DigestSEO require authentication?

No - the endpoint accepted our unauthenticated MCP initialize when probed on 2026-09-30; you can connect without credentials.

07 · Alternatives to Web Validator by DigestSEO

Alternatives to Web Validator by DigestSEO

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