# `dev.workers.mike-tusa.mailalign/mailalign` 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/dev.workers.mike-tusa.mailalign/mailalign
- JSON: https://anlyon.dev/api/v1/servers/dev.workers.mike-tusa.mailalign/mailalign
- Version: 0.1.2 (active)
- Publisher: dev.workers.mike-tusa.mailalign (domain proven to the MCP Registry)
- Runs: remote (streamable-http)
- Sign-in to list tools: none
- Metadata from the official MCP Registry, synced 2026-10-21T18:12:29.997Z

Title and description, as the publisher wrote them:

```untrusted-server-text
MailAlign
Email header analyzer: SPF/DKIM/DMARC/ARC verdicts, domain alignment, hop delays. No lookups.
```

Scanned 2026-10-21T19:12:42.231Z over streamable-http.

**1 tool: 1 only read.**

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

## Exfil surface

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

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

## Findings

No check matched anything in these tool definitions.


## Only reads (1)

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

### `analyze_headers`

- The name "analyze_headers" says "analyze": a word for reading.
- Tag private-data: The description's first sentence says "analyze" and "email": it reads mail.
- Tag untrusted-input: The description's first sentence says "analyze" and "email": it reads inbound email, which other people can write.

Description, as the server wrote it:

```untrusted-server-text
Analyze pasted raw email headers. Reports From / Return-Path / Reply-To / DKIM d= alignment (relaxed and strict), SPF / DKIM / DMARC / ARC verdicts as recorded by the receiving servers (Authentication-Results, ARC-*), the Received hop chain oldest first with per-hop delays and public IPs, and plain-English findings with severity and what each means or how to fix it. Makes no network or DNS calls and does not verify signatures. Header text is not stored. Read-only. Same engine as the MailAlign JSON API (POST /api/analyze).
```

## Claude Code permissions

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

```json
{
  "permissions": {
    "allow": [
      "mcp__mailalign__analyze_headers"
    ],
    "ask": [],
    "deny": []
  }
}
```

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

- `mcp__mailalign__analyze_headers`: private-data, untrusted-input

## Remote posture

What an anonymous client saw at the remote endpoint, last 2026-10-22T15:21:57.646Z, unchanged since 2026-10-22T15:21:57.646Z. 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 | `0` |
| 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` |