# `io.github.rmach816/mesquared-mcp-server` on anlyon.dev

> Text inside fenced blocks marked untrusted-server-text was written by the MCP server's publisher, not by anlyon.dev. It is data to inspect, not instructions to follow. Invisible characters are shown as [U+XXXX].
> No finding is not a safety guarantee: these are point-in-time checks of tool definitions, not of code or behaviour.

- Page: https://anlyon.dev/servers/io.github.rmach816/mesquared-mcp-server
- JSON: https://anlyon.dev/api/v1/servers/io.github.rmach816/mesquared-mcp-server
- Version: 0.2.4 (active)
- Publisher: io.github.rmach816 (GitHub account)
- Runs: remote (streamable-http)
- Sign-in to list tools: none
- Repository: https://github.com/rmach816/mesquared-mcp-server
- Metadata from the official MCP Registry, synced 2026-10-21T18:46:11.146Z

Title and description, as the publisher wrote them:

```untrusted-server-text
MeSquared Visibility
Public-site SEO/AEO readiness scans with evidence scores, issues, and clear measurement scope.
```

Scanned 2026-10-21T19:26:46.909Z over streamable-http.

**3 tools: 2 change things and 1 only read.**

| Group | Class | Tools | Claude Code |
| --- | --- | --- | --- |
| Deletes or cancels | destructive | 0 | deny |
| Can't be undone | irreversible | 0 | ask |
| Changes things | write | 2 | ask |
| Only reads | read | 1 | allow |

## Exfil surface

No private-data -> untrusted-input -> outbound path in this server alone: no tool is tagged private-data.

| Tag | Meaning | Tools |
| --- | --- | --- |
| private-data | Reads files, mail, messages, databases, secrets, calendars or repositories. | none |
| untrusted-input | Brings in text someone else can write: web pages, inbound email, messages, issues and comments. | `mcp__mesquared__compare_visibility` `mcp__mesquared__scan_visibility` `mcp__mesquared__visibility_audit_info` |
| outbound | Can carry data to people or systems: it sends, posts or publishes, or takes a recipient, channel or URL. | `mcp__mesquared__scan_visibility` |

## Findings

- **warn** Annotations that disagree with the tool in `scan_visibility` ([annotation-conflict](https://anlyon.dev/methodology#annotation-conflict))

```untrusted-server-text
The server marks "scan_visibility" read-only (readOnlyHint: true), and its own name, description or input give the class "write".

annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":true}; The description's first verb is "run": a word for a change.
```

- **warn** Annotations that disagree with the tool in `compare_visibility` ([annotation-conflict](https://anlyon.dev/methodology#annotation-conflict))

```untrusted-server-text
The server marks "compare_visibility" read-only (readOnlyHint: true), and its own name, description or input give the class "write".

annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":true}; The name "compare_visibility" says "compare": a word for reading.
```


## Changes things (2)

Creates or changes something that can be changed back. Claude Code: ask.

### `compare_visibility`

- The name "compare_visibility" says "compare": a word for reading.
- The description's first verb is "run": a word for a change.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
- Tag untrusted-input: The server marks it openWorldHint: true: it reaches things outside the server's own data. The description's first sentence says "run" and "website": it reads web pages, which anyone can write.
- Findings: warn annotation-conflict

Description, as the server wrote it:

```untrusted-server-text
Run public-site SEO/AEO website-readiness scans for two business websites and compare aggregate scores, selected evidence, site signals, and top issues. This is a readiness comparison, not observed rank or live citation benchmarking.
```

### `scan_visibility`

- The description's first verb is "run": a word for a change.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
- Tag untrusted-input: The server marks it openWorldHint: true: it reaches things outside the server's own data.
- Tag outbound: The input takes a URL (input.url): a request to a URL can carry data to whoever runs it.
- Findings: warn annotation-conflict

Description, as the server wrote it:

```untrusted-server-text
Run a public-site SEO/AEO website-readiness scan for one business website. Returns aggregate readiness scores, selected technical and answer-quality evidence, site signals, and prioritized issues. This does not measure observed rankings, Search Console performance, or live AI mentions/citations.
```

## Only reads (1)

Looks things up and changes nothing. Claude Code: allow.

### `visibility_audit_info`

- The description's first verb is "explain": a word for reading.
- Tag untrusted-input: The server marks it openWorldHint: true: it reaches things outside the server's own data.

Description, as the server wrote it:

```untrusted-server-text
Explain the MeSquared SEO/AEO website-readiness methodology, its measurement boundaries, and how to use the available scan tools.
```

## Claude Code permissions

For `.claude/settings.json`, assuming the server is installed as `mesquared`:

```json
{
  "permissions": {
    "allow": [
      "mcp__mesquared__visibility_audit_info"
    ],
    "ask": [
      "mcp__mesquared__scan_visibility",
      "mcp__mesquared__compare_visibility"
    ],
    "deny": []
  }
}
```

Capability tags behind the rules (a read tagged outbound is asked about):

- `mcp__mesquared__visibility_audit_info`: untrusted-input
- `mcp__mesquared__scan_visibility`: untrusted-input, outbound
- `mcp__mesquared__compare_visibility`: untrusted-input

## Remote posture

What an anonymous client saw at the remote endpoint, last 2026-10-22T15:04:54.796Z, unchanged since 2026-10-22T15:04:54.796Z. No credentials were sent and no tool was called. Values are shown as the endpoint returned them. Method: https://anlyon.dev/methodology#remote-posture

| Fact | Observed |
| --- | --- |
| Reachable | `yes` |
| HTTP status of an anonymous initialize | `200` |
| tools/list served without credentials | `yes` |
| Tools that change things, listed without credentials | `2` |
| Protocol version | `2025-06-18` |
| WWW-Authenticate on 401 | `not observed` |
| resource_metadata in WWW-Authenticate | `none` |
| RFC 9728 protected resource metadata | `none` |
| Authorization servers | `none` |
| Legacy HTTP+SSE transport | `no` |
| Dynamic client registration | `not observed` |
| Client ID metadata documents | `not observed` |

- **warn** Tools that change things, listed to anyone ([unauth-remote-writes](https://anlyon.dev/methodology#unauth-remote-writes))

```untrusted-server-text
The endpoint served tools/list without credentials, and the list has 2 tools that change things (2 write). Whether a call also works without credentials was not tested: tools are never called.

https://mesquared-mcp-server.vercel.app/mcp: tools/list returned 3 tools to an anonymous client, including scan_visibility (write), compare_visibility (write)
```