SEO Notary

Name: SEO Notary
Author: raxocode

by raxocodeversion 0.1.0i★ –iRuns on your computer

Registry nameio.github.raxocode/seo-notary

Install

Overview

Description from the maker (original English)

Verify what a web page really returns over HTTP and in a browser. Deterministic, local, no LLM.

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
UsageiNot measured yet★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs on your computer
Transport: stdio
Category: Web & browsers

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 1 of 1 passed
Runs on your computer with your user’s permissions (files, network, apps).
The registry lists no key to fill in.

You need

npmNode.js installed (for the npx command)

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json

{
  "mcpServers": {
    "seo-notary": {
      "command": "npx",
      "args": [
        "-y",
        "seo-notary",
        "mcp"
      ]
    }
  }
}

Run this in your terminal

claude mcp add seo-notary -- npx -y seo-notary mcp

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "seo-notary": {
      "command": "npx",
      "args": [
        "-y",
        "seo-notary",
        "mcp"
      ]
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "seo-notary": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "seo-notary",
        "mcp"
      ]
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

This one runs on your computer, and ChatGPT can only connect to servers on the internet. Pick another app.

Your choice stays on this device in a cookie; no account needed.

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

Runs on your computer; the tool list appears in your AI app after you install it.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 7, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account raxocode, which owns the repo
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
– Not applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
– Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
… Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints

Compared with others in Web & browsersi

More stars than 0% of the other 881 servers in this category
Published to the registry more recently than 62% of the other 881 servers in this category
Basic checks equal to or better than 100% of the other 881 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is SEO Notary safe?

It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

The registry does not list a required key, though some servers ask you to sign in on first use.

Does it run on my computer or in the cloud?

It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).

Is it still maintained?

The GitHub repo last changed –, and the latest version (0.1.0) reached the registry 21 days ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Node.js on your computer.

What can I use instead?

In the same category: Browser Use, Chrome DevTools MCP, MCP Server Browser

Alternatives

Servers in the same category from other makers, sorted by stars.

Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

Browser Use

by browser-use

Lets AI do web tasks for you, such as filling forms, searching and extracting data, in the maker’s cloud browsers or on your computer.

Computer or cloud★ 120,087MITUpdated 17 days ago

Install

Chrome DevTools MCP

by ChromeDevTools

Lets AI use Chrome’s developer tools to inspect pages, find what makes them slow and spot errors. Made by the Chrome DevTools team.

Runs on your computer★ 54,821Apache-2.0Updated 16 days ago

Install

MCP Server Browser

by bytedance

MCP server for browser use access

Runs on your computer★ 39,550Apache-2.0Updated 14 months ago

Install

README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

SEO Notary

Verify what a web page really returns, so your coding agent can fix it and prove it.

HTTP and real-browser checks for Claude Code, Cursor, VS Code and CI. Deterministic. No LLM. One command.

Status: 0.1 (early release). APIs, rule output and rule severities may still change between 0.x releases; see the changelog.

Coding agents edit page code but cannot see what the page actually serves. Client-side scripts overwrite titles and canonicals, server rendering breaks, redirects bounce, and the agent reports "done" without evidence. SEO Notary fetches the page, runs deterministic rules over the response and the rendered DOM, and returns structured findings with stable exit codes.

$ seo-notary verify http://127.0.0.1:4173/broken --tier browser

FAIL http://127.0.0.1:4173/broken tier browser (faithful), 1153 ms, 0 redirects, HTTP 200 title Acme Widgets | Handmade widgets for every workshop canonical http://127.0.0.1:4173/broken rendered DOM title Loading... canonical https://staging.acme.example/broken

2 errors, 0 warnings, 0 info; 20 rules passed

ERROR RENDER_TITLE_DIFFERS head > title The title changes after JavaScript runs. raw: Acme Widgets | Handmade widgets for every workshop rendered: Loading... fix: Make the server-rendered title and the client-rendered title agree. $ echo $? 1

That output is abridged from a real run of the demo in this repository. Remove the script that rewrites the title and canonical and the same command prints PASS and exits 0.

Quickstart

Requires Node >=22.19.0.

# Tier 1: raw HTTP and HTML. No browser, nothing to download.

npx seo-notary verify http://localhost:3000/

Tier 2: also render the page in Chromium and compare raw vs rendered.

npx seo-notary install-browser npx seo-notary verify http://localhost:3000/ --tier browser

To run from a checkout instead: npm install && npm run build, then node packages/cli/dist/bin.js verify .

Exit codes: 0 pass, 1 findings at or above --fail-on (default error), 2 operational failure (bad input, network, timeout, policy, browser). Use --format json for exactly one JSON document on stdout. Details: docs/CLI.md.

Use it from an agent

seo-notary mcp runs a local MCP server over stdio with two tools: verify_url and get_rule_catalog. verify_url returns the full report as structured content plus a short summary, in one call. See docs/MCP.md for what has and has not been tested, and for an AGENTS.md snippet that tells agents to verify after frontend changes.

What it checks

HTTP status, redirect chain, content type, title, meta description, canonical link, robots directives (meta and X-Robots-Tag) and JSON-LD syntax in the raw response. With --tier browser: whether the title, canonical, robots meta and description change after JavaScript runs, framework hydration error messages, uncaught page errors, console errors and failed requests. 23 rules in total: docs/RULES.md. Each lists what it does not prove.

What it does not do

No crawling, rank tracking, keyword or backlink data, and no claims about indexing or ranking. It reports measured signals only.
No LLM calls and no code uploads. It fetches the URL you give it.
No hosted service. It runs on your machine.
"Hydration error detected" is pattern matching on console messages, not proof of a markup mismatch.
The browser tier is not pixel-accurate in either mode.

Security

Page content is untrusted evidence: output strings are stripped of control characters and length-bounded, and nothing in a page is ever treated as an instruction. Two network profiles exist. local (default) lets you verify localhost and private hosts; strict allows public hosts only. A redirect can never move from a public host to a private address. Limits and caveats, including the browser tier's best-effort interception, are in docs/SECURITY.md. To report a vulnerability see SECURITY.md. No third-party security audit has been performed.

Packages

Package	Purpose
`seo-notary`	CLI and local MCP server
`seo-notary-core`	Schemas, network policy, fetcher, rules, reports. No browser dependency
`seo-notary-browser`	Optional Playwright adapter

Development

Requires Node >=22.19.0.

npm install

npm run build npm run typecheck && npm run lint npm test # unit and integration npm run test:security # network policy npm run test:browser # needs Chromium: npx playwright-core install --only-shell chromium npm run test:smoke # packs and installs the packages into an empty directory npm run demo # serves the broken/fixed demo on http://127.0.0.1:4173

Docs: Architecture, CLI, MCP, Rules, Threat model, Decisions. Contributions: CONTRIBUTING.md.

License

Source code is released under the MIT License. The Raxocode and SEO Notary names and logos are not covered by that license; see TRADEMARK.md.

Built by Raxocode. Project site: seonotary.com.

SEO Notary

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Web & browsersi

Common questions

Alternatives

Browser Use

Chrome DevTools MCP

MCP Server Browser

README from the maker

SEO Notary

Quickstart

Tier 2: also render the page in Chromium and compare raw vs rendered.

Use it from an agent

What it checks

What it does not do

Security

Packages

Development

License