# io.github.geekmarine/mcp-email-auditor (remote · mcp-mx-validator-worker.stubby76.workers.dev)

Validates domain email MX records and DNS status via Cloudflare DNS-over-HTTPS.

- Trust score: 28/100 (low)
- Change this week: 0
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-10-23

## Components

- remote · `mcp-mx-validator-worker.stubby76.workers.dev`: 28/100 (this document), [markdown](https://verifymcp.io/servers/geekmarine-mcp-email-auditor/mcp-mx-validator-worker.md), [page](https://verifymcp.io/servers/geekmarine-mcp-email-auditor/mcp-mx-validator-worker)

## Channel facts

- Endpoint: `https://mcp-mx-validator-worker.stubby76.workers.dev/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `1.0.0`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-10-23.

- **Endpoint Security**: 46/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - Authorisation not fully verified: no authorisation is required to connect, but we couldn't read the whole tool list to see what that exposes.
  - HTTPS enforcement could not be verified: the plaintext port answered with HTTP 405, which proves neither a plaintext path nor enforcement.
  - HSTS check failed: the Strict-Transport-Security header is absent.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 0/100
  - Schema not yet verified: we couldn't read the endpoint's schema, or could read only part of its tool list.
- **Stability & Change Management**: 0/100
  - Stability not yet verified: not enough scan history yet (needs a 30-day window).
- **Tool Coverage**: 0/100
  - Tool coverage not yet verified: we couldn't read the endpoint's tools, or could read only part of the list.
- **Tool Safety**: 0/100
  - Tool safety not yet verified: we couldn't read the endpoint's tools, or could read only part of the list.
- **Capabilities**: 0/100
  - Capabilities not yet verified: we couldn't read the endpoint's capabilities.

**Unverified: 5 categories.** Categories scored 0 because we could not verify them: authentication we do not have, an unreachable endpoint, or not enough scan history. We only credit what we can confirm.

## Install

### How do I install the io.github.geekmarine/mcp-email-auditor server?

io.github.geekmarine/mcp-email-auditor is a hosted endpoint at https://mcp-mx-validator-worker.stubby76.workers.dev/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add --transport http geekmarine-mcp-email-auditor 'https://mcp-mx-validator-worker.stubby76.workers.dev/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "geekmarine-mcp-email-auditor": {
      "url": "https://mcp-mx-validator-worker.stubby76.workers.dev/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "geekmarine-mcp-email-auditor": {
      "type": "http",
      "url": "https://mcp-mx-validator-worker.stubby76.workers.dev/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.geekmarine-mcp-email-auditor]
url = "https://mcp-mx-validator-worker.stubby76.workers.dev/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "geekmarine-mcp-email-auditor": {
      "type": "remote",
      "url": "https://mcp-mx-validator-worker.stubby76.workers.dev/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add geekmarine-mcp-email-auditor --url 'https://mcp-mx-validator-worker.stubby76.workers.dev/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  geekmarine-mcp-email-auditor:
    url: "https://mcp-mx-validator-worker.stubby76.workers.dev/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "geekmarine-mcp-email-auditor": {
      "Transport": "http",
      "Url": "https://mcp-mx-validator-worker.stubby76.workers.dev/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add geekmarine-mcp-email-auditor -t streamable-http -u 'https://mcp-mx-validator-worker.stubby76.workers.dev/mcp'
```

### Other

```json
{
  "mcpServers": {
    "geekmarine-mcp-email-auditor": {
      "type": "http",
      "url": "https://mcp-mx-validator-worker.stubby76.workers.dev/mcp"
    }
  }
}
```

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-10-01 (score 28, −30)

- [security regression] Endpoint reachability: reachable → not serving MCP
- [security regression] Tool safety: pass → unverified
- [security] Authorization: Authorisation not fully verified: no authorisation is required to connect, but we couldn't read the whole tool list to see what that exposes.
- [functional regression] Capabilities: fail → unverified
- [functional regression] Tool coverage: 100 → unverified
- [functional] First check of Schema quality: unverified

### 2026-09-30 (score 58)

First indexed and scored.

## MCP tools (1)

### `validate_email_domain_mx` (~58 tokens)

Validates email MX records for a domain using Cloudflare DNS-over-HTTPS (DoH).

Input parameters:

- `domain` (string, required): The domain name or email address to validate (e.g., 'example.com' or 'user@example.com').

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/geekmarine-mcp-email-auditor/mcp-mx-validator-worker#diagnostics

## Score history

- 2026-10-23: 28
- 2026-10-22: 28
- 2026-10-21: 28
- 2026-10-20: 28
- 2026-10-19: 28
- 2026-10-18: 28
- 2026-10-17: 28
- 2026-10-16: 28
- 2026-10-15: 28
- 2026-10-14: 28
- 2026-10-13: 28
- 2026-10-12: 28
- 2026-10-11: 28
- 2026-10-10: 28
- 2026-10-07: 28
- 2026-10-06: 28
- 2026-10-05: 28
- 2026-10-04: 28
- 2026-10-03: 28
- 2026-10-02: 28
- 2026-10-01: 28
- 2026-09-30: 58

## Common questions

### What is the io.github.geekmarine/mcp-email-auditor server?

io.github.geekmarine/mcp-email-auditor is listed in the public MCP registry as io.github.geekmarine/mcp-email-auditor. Validates domain email MX records and DNS status via Cloudflare DNS-over-HTTPS. This page covers its hosted endpoint (https://mcp-mx-validator-worker.stubby76.workers.dev/mcp).

### Is the io.github.geekmarine/mcp-email-auditor server safe to use?

io.github.geekmarine/mcp-email-auditor scores 28 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

### What tools does the io.github.geekmarine/mcp-email-auditor server expose?

io.github.geekmarine/mcp-email-auditor exposes 1 tool: validate_email_domain_mx. Their descriptions and schemas cost roughly 58 tokens of context every time the server is loaded.

### Does the io.github.geekmarine/mcp-email-auditor server require authentication?

No. We connected to io.github.geekmarine/mcp-email-auditor without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

### Is the io.github.geekmarine/mcp-email-auditor server still maintained?

io.github.geekmarine/mcp-email-auditor is still listed as active in the MCP registry. We last reached this channel on 23 October 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

## Links

- Remote endpoint: https://mcp-mx-validator-worker.stubby76.workers.dev/mcp
- Repository: https://github.com/geekmarine/mcp-email-auditor
- Changelog RSS feed: https://verifymcp.io/servers/geekmarine-mcp-email-auditor/mcp-mx-validator-worker.xml
- Changelog JSON feed: https://verifymcp.io/servers/geekmarine-mcp-email-auditor/mcp-mx-validator-worker.json
- HTML version of this page: https://verifymcp.io/servers/geekmarine-mcp-email-auditor/mcp-mx-validator-worker