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Lumen MCP server

by nitishagar·io.github.nitishagar/lumen·v0.3.0
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Deterministic SEO audits as MCP tools: 36-rule site audit, keywords, rank, CWV reports.

B83/100grade B
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Safety scan
B83/100

full report

Adoption
New

0 stars9 downloads/wk

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If you have run it, two minutes of your experience saves the next person an afternoon.

Lumen tools

No tool declarations could be read from the package source. They show once the server is installed.

Public scan report

scanner v0.1.10 · 2026-10-01 · same rubric, same numbers if you re-run it

no findings
  • Code scan75 source files scanned25/25
  • –Live reliabilityno gateway calls yet and no remote to proben/a
  • –Tool poisoningtools not inspected (local package is not executed); not countedn/a
  • Auth qualitystatic API keys via environment variables6/15
  • Maintenancelast push 0 days ago15/15
  • Maintainer identityregistry namespace matches repository owner; GitHub account older than a year8/10
Overall 83/100. Components that don't apply are left out of the denominator. Any critical finding is an F.RubricAppeal a findingJSON

How Lumen compares

Against every graded SEO MCP server, from our own scans and uptime checks. Updated after each scan run.

Safety score
83/100
higher than 70% of 769 SEO servers
Downloads a week
9
more than 0% of 170 SEO servers with a package

Install Lumen in Claude Code, Cursor or VS Code

Runs npx -y @lumen-seo/cli on your machine. Read the scan report first; the gateway never runs local packages.

claude mcp add lumen -- npx -y @lumen-seo/cli
Add to Cursor

What the publisher says

From the Lumen repository's README, as published. We do not edit it. Read it on GitHub

lumen

Lightweight, pluggable, MCP-first SEO toolkit — free services only, bring your own keys, provenance on every number.

Status: v0.2.x — first public release. The CLI, the five MCP tools, and the docs site are live; see CHANGELOG.md for what shipped and the docs for the full guides.

Why lumen

Most SEO tooling is a black box with a subscription. lumen is the opposite: a local-first, agent-first audit toolkit that runs on free data sources, never ships a number it can't attribute, and speaks MCP so your coding agent can run it for you.

  • Local site audits — bounded, robots-respecting crawler with 36 built-in rules, severity scoring, and CI-friendly exit codes (0 pass, 1 findings, 2 usage/abort).
  • Free-tier data providers — PageSpeed Insights, CrUX, Google Suggest, Wikipedia demand, OpenPageRank, Tranco, DuckDuckGo SERP. BYOK: keys are read from env vars by name, never stored or logged.
  • MCP-first — five tools (lumenauditsite, lumenpagereport, lumenkeywordideas, lumenrankcheck, lumen_authority) over stdio or a thin Cloudflare Worker gateway.
  • Provenance on every number — each metric carries its source and fetch timestamp; no free source, no number.

Quickstart

Requires Node >= 22.7.

# One-off audit — no install
npx -y @lumen-seo/cli audit https://example.com

# Install globally
npm install -g @lumen-seo/cli
lumen audit https://example.com --max-pages 50

Wire it into Claude Code (or Cursor / VS Code — MCP onboarding):

claude mcp add --transport stdio lumen -- npx -y @lumen-seo/cli mcp

Then just ask: "audit my site and tell me what to fix first."

Packages

Note on packaging: npm packages ship compiled JavaScript + type declarations (dist/) — plain node import, no flags, no tsx. The TypeScript sources stay the source of truth in the repo; the release pipeline compiles per package at publish time.

Documentation

  • Quickstart — first audit, JSON output, CI usage
  • CLI reference — all thirteen commands and flags
  • Rules reference — the 36 rules, severities, scoring
  • Providers & BYOK — data sources, keys, rate-limit etiquette
  • MCP onboarding — Claude, Cursor, VS Code, remote gateway

Development

Requires Node >= 22.

npm install
npm run lint
npm run typecheck
npm test

Shortened. The full README is on GitHub.

Nothing above is checked by us. What we check is on the safety report.

Lumen: common questions

Is Lumen MCP server safe?
Mostly: it is graded B (83/100). Read the Lumen safety report
How do I install Lumen?
It runs on your machine. Copy the Claude Code, Cursor, VS Code or Claude Desktop config from the install section.
Does Lumen need an API key?
Yes. The registry entry asks for LUMEN_PSI_KEY, LUMEN_CRUX_KEY, LUMEN_OPR_KEY.
Is Lumen maintained?
The last commit was 34 days ago (2026-10-01). The latest release is v0.3.0.
What can I use instead of Lumen?
Servers from other publishers that do the same job: DispatchSEO MCP server, Crawlie MCP server and Outrank MCP server.
How does Lumen compare with other SEO MCP servers?
safety score 83/100 (higher than 70% of 769 SEO servers); downloads a week 9 (more than 0% of 170 SEO servers with a package). Full comparison.

Alternatives to Lumen

Same job from other publishers: the closest match first, then the best rated.

  • DispatchSEO
    Open-source SEO manager for coding agents: keyword research, content PRs, rank + Search Console.
    A
  • Crawlie
    Technical SEO + GEO (AI-search) site audits: hosted crawls, prioritized fixes, report diffs.
    A
  • Outrank
    Plan SEO keywords, write and publish articles to your site, read Search Console and backlink data
    A
  • pseolint
    Penalty-risk audit for programmatic SEO sites: verdict, risk score, and a fix manifest.
    B
  • Open SEO Crawler
    Self-hosted SEO crawler: run site audits and AI crawler checks, then read the issues and pages.
    A