# Email DNS Preflight x402 (remote · email-dns-preflight-x402.copper-crate.workers.dev)

Paid email, DNS, mail-security and RDAP intelligence for agents over x402.

- Trust score: 76/100 (medium)
- Change this week: +3
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-10-23

## Components

- remote · `email-dns-preflight-x402.copper-crate.workers.dev`: 76/100 (this document), [markdown](https://verifymcp.io/servers/rosariov25-email-dns-preflight-x402/email-dns-preflight-x402.md), [page](https://verifymcp.io/servers/rosariov25-email-dns-preflight-x402/email-dns-preflight-x402)

## Channel facts

- Endpoint: `https://email-dns-preflight-x402.copper-crate.workers.dev/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `1.1.0`

## 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**: 69/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one.
  - HTTPS enforcement could not be verified: the plaintext port answered with HTTP 405, which proves neither a plaintext path nor enforcement.
  - The HSTS (Strict-Transport-Security) header is present.
  - 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**: 69/100
  - AI-judged instruction clarity (good).
  - Tool/resource definitions use about 290 tokens (~72/item across 4 items; 4 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 77/100
  - Stability observed for 23 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 67/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 0% of tool parameters carry a description.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 4 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 5 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a current MCP spec version (2026-07-28).

## Install

### How do I install the Email DNS Preflight x402 MCP server?

Email DNS Preflight x402 is a hosted endpoint at https://email-dns-preflight-x402.copper-crate.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 rosariov25-email-dns-preflight-x402 'https://email-dns-preflight-x402.copper-crate.workers.dev/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "rosariov25-email-dns-preflight-x402": {
      "url": "https://email-dns-preflight-x402.copper-crate.workers.dev/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "rosariov25-email-dns-preflight-x402": {
      "type": "http",
      "url": "https://email-dns-preflight-x402.copper-crate.workers.dev/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.rosariov25-email-dns-preflight-x402]
url = "https://email-dns-preflight-x402.copper-crate.workers.dev/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "rosariov25-email-dns-preflight-x402": {
      "type": "remote",
      "url": "https://email-dns-preflight-x402.copper-crate.workers.dev/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add rosariov25-email-dns-preflight-x402 --url 'https://email-dns-preflight-x402.copper-crate.workers.dev/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  rosariov25-email-dns-preflight-x402:
    url: "https://email-dns-preflight-x402.copper-crate.workers.dev/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "rosariov25-email-dns-preflight-x402": {
      "Transport": "http",
      "Url": "https://email-dns-preflight-x402.copper-crate.workers.dev/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add rosariov25-email-dns-preflight-x402 -t streamable-http -u 'https://email-dns-preflight-x402.copper-crate.workers.dev/mcp'
```

### Other

```json
{
  "mcpServers": {
    "rosariov25-email-dns-preflight-x402": {
      "type": "http",
      "url": "https://email-dns-preflight-x402.copper-crate.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.

### 2026-10-22 (score 76, +1)

No change was recorded against any check on this day. Stability & Change Management went from 70 to 73. That category is still filling its 30-day observation window: 21 days of observed history at the previous scan, 22 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-20 (score 75, +1)

No change was recorded against any check on this day. Stability & Change Management went from 63 to 67. That category is still filling its 30-day observation window: 19 days of observed history at the previous scan, 20 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-18 (score 74, +1)

No change was recorded against any check on this day. Stability & Change Management went from 57 to 60. That category is still filling its 30-day observation window: 17 days of observed history at the previous scan, 18 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-16 (score 73, +1)

No change was recorded against any check on this day. Stability & Change Management went from 50 to 53. That category is still filling its 30-day observation window: 15 days of observed history at the previous scan, 16 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-14 (score 72, +1)

No change was recorded against any check on this day. Stability & Change Management went from 43 to 47. That category is still filling its 30-day observation window: 13 days of observed history at the previous scan, 14 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-12 (score 71, +1)

No change was recorded against any check on this day. Stability & Change Management went from 33 to 40. That category is still filling its 30-day observation window: 10 days of observed history at the previous scan, 12 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-10 (score 70, +1)

No change was recorded against any check on this day. Stability & Change Management went from 23 to 33. That category is still filling its 30-day observation window: 7 days of observed history at the previous scan, 10 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-07 (score 69, +2)

No change was recorded against any check on this day. Stability & Change Management went from 13 to 23. That category is still filling its 30-day observation window: 4 days of observed history at the previous scan, 7 at this one. The score rises as the window fills, whether or not the server changes.

## MCP tools (4)

### `email_preflight` (~55 tokens)

Email DNS Preflight

Validate practical email syntax and inspect DNS, mail routing, authentication and domain-security posture. DNS-level only; no SMTP mailbox-existence claim. Costs $0.001 native USDC on Base.

Input parameters:

- `email` (string, required)

### `domain_preflight` (~65 tokens)

Domain DNS Preflight

Inspect DNS records, CAA, SPF/DMARC/DKIM/BIMI, DNSSEC, RDAP age/expiry, registrar-lock and nameserver-redundancy posture. Costs $0.001 native USDC on Base.

Input parameters:

- `domain` (string, required)

### `domain_email_security` (~57 tokens)

Domain Email Security

Focused SPF/DMARC/DKIM/BIMI diagnostics with bounded recursive SPF lookup analysis, CAA/DNSSEC context and deterministic fixes. Costs $0.001 native USDC on Base.

Input parameters:

- `domain` (string, required)

### `domain_rdap` (~54 tokens)

Domain Age and RDAP

Privacy-safe RDAP/WHOIS-successor lookup for domain age, expiry, registrar, statuses, nameservers and DNSSEC delegation. Costs $0.001 native USDC on Base.

Input parameters:

- `domain` (string, required)

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/rosariov25-email-dns-preflight-x402/email-dns-preflight-x402#diagnostics

## Score history

- 2026-10-23: 76
- 2026-10-22: 76
- 2026-10-21: 75
- 2026-10-20: 75
- 2026-10-19: 74
- 2026-10-18: 74
- 2026-10-17: 73
- 2026-10-16: 73
- 2026-10-15: 72
- 2026-10-14: 72
- 2026-10-13: 71
- 2026-10-12: 71
- 2026-10-10: 70
- 2026-10-07: 69
- 2026-10-04: 67
- 2026-10-03: 67
- 2026-10-02: 66
- 2026-10-01: 66
- 2026-09-30: 65

## Common questions

### What is the Email DNS Preflight x402 MCP server?

Email DNS Preflight x402 is an MCP server listed in the public MCP registry as io.github.rosarioV25/email-dns-preflight-x402. Paid email, DNS, mail-security and RDAP intelligence for agents over x402. This page covers its hosted endpoint (https://email-dns-preflight-x402.copper-crate.workers.dev/mcp).

### Is the Email DNS Preflight x402 MCP server safe to use?

Email DNS Preflight x402 scores 76 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 Email DNS Preflight x402 MCP server expose?

Email DNS Preflight x402 exposes 4 tools: email_preflight, domain_preflight, domain_email_security, domain_rdap. Their descriptions and schemas cost roughly 231 tokens of context every time the server is loaded.

### Does the Email DNS Preflight x402 MCP server require authentication?

No. We connected to Email DNS Preflight x402 without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

### Is the Email DNS Preflight x402 MCP server still maintained?

Email DNS Preflight x402 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://email-dns-preflight-x402.copper-crate.workers.dev/mcp
- Website: https://email-dns-preflight-x402.copper-crate.workers.dev/docs
- Changelog RSS feed: https://verifymcp.io/servers/rosariov25-email-dns-preflight-x402/email-dns-preflight-x402.xml
- Changelog JSON feed: https://verifymcp.io/servers/rosariov25-email-dns-preflight-x402/email-dns-preflight-x402.json
- HTML version of this page: https://verifymcp.io/servers/rosariov25-email-dns-preflight-x402/email-dns-preflight-x402