WSG Check MCP Server

Check a website against automated heuristics based on the W3C Web Sustainability Guidelines. Get a weighted score, recommendations, and reports in terminal, JSON, Markdown, or HTML format through a CLI or a Next.js web app. It runs locally over stdio via the published package.

People who work with code quality analyzer, linting and sustainability and want it reachable from Claude, Cursor, VS Code, or another MCP client. The project is written in TypeScript.

VERIFIED ACTIVE

LAST COMMIT 2026-09-27 · ★ 3 · #223 OF 998 MAINTAINED OTHER · VERIFIED 2026-09-30

NOASSERTION · TypeScript servers · how we verify → /methodology

01 · Install WSG Check

Claude Code

claude mcp add ivanoats-wsg-check -- npx -y @sustainablewebsites/wsg-check

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "ivanoats-wsg-check": {
      "command": "npx",
      "args": [
        "-y",
        "@sustainablewebsites/wsg-check"
      ]
    }
  }
}

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

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

license no standard license detected - usage rights unclear; check the repo before commercial use

npm package @sustainablewebsites/wsg-check - the @sustainablewebsites scope differs from the repo owner (ivanoats); confirm it's the project's official package

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

03 · What WSG Check can do

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

Latest releases

v0.6.0 · 2026-09-26

0.6.0 (2026-09-26) · Added · list the server in the MCP Registry

v0.5.0 · 2026-09-26

0.5.0 (2026-09-26) · Added · search guideline descriptions in list_guidelines · add the wsg-sustainability-review Agent Skill

v0.4.0 · 2026-09-26

0.4.0 (2026-09-26) · Added · list_guidelines and get_guideline MCP tools (MCP Phase 2) · Changed · user and contributor docs for the MCP server (MCP Phase 3)

04 · Who maintains WSG Check

WSG Check is maintained by ivanoats. It's the only MCP server we track from this author; the repo dates to Feb 2026.

05 · Facts

repository: github.com/ivanoats/wsg-check
website: https://github.com/ivanoats/wsg-check#use-with-ai-assistants-mcp
category: other - ranked #223 of 998 actively-maintained other servers as of 2026-09-30.
release cadence: 6 releases in the last 90 days (latest 2026-09-26)
registry: io.github.ivanoats/wsg-check (active, first published 2026-09-26)
packages: npm:@sustainablewebsites/wsg-check

06 · WSG Check FAQ

What is WSG Check?

Is WSG Check still maintained?

Yes - as of 2026-09-30, its last commit was 2026-09-27 and it shipped 6 releases in the last 90 days. We re-verify nightly.

How do I install WSG Check?

Run `npx -y @sustainablewebsites/wsg-check`. You can also paste the ready-made client config above.

Does WSG Check run locally?

Yes - it's a stdio server: it runs on your machine (via npx) with your user's permissions. Your data stays local unless the server itself calls external APIs.

07 · Alternatives to WSG Check

Alternatives to WSG Check

Maintained other servers if WSG Check isn't the fit.

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