# Powerline Email Tools (remote · powerline.ai)

Email deliverability checks: SPF, DKIM, DMARC, BIMI, MTA-STS, blacklists, headers, spam words

- Trust score: 83/100 (high trust)
- Change this week: +1
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-11-05

## Components

- remote · `powerline.ai`: 83/100 (this document), [markdown](https://verifymcp.io/servers/ai-powerline-email-tools/powerline.md), [page](https://verifymcp.io/servers/ai-powerline-email-tools/powerline)

## Channel facts

- Endpoint: `https://powerline.ai/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 2026-11-05.

- **Endpoint Security**: 74/100
  - 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 is enforced; there's no plaintext access path.
  - 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**: 76/100
  - AI-judged instruction clarity (excellent).
  - Context-footprint check failed: tool/resource definitions use about 735 tokens (~147/item across 5 items; 5 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 100/100
  - No destabilizing schema changes in the last 30 days.
- **Tool Coverage**: 94/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 82% 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 5 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 6 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 60/100
  - Spec-recency check failed: implements MCP spec 2025-06-18; the latest is 2026-07-28.

## Install

### How do I install the Powerline Email Tools MCP server?

Powerline Email Tools is a hosted endpoint at https://powerline.ai/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 ai-powerline-email-tools 'https://powerline.ai/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "ai-powerline-email-tools": {
      "url": "https://powerline.ai/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "ai-powerline-email-tools": {
      "type": "http",
      "url": "https://powerline.ai/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.ai-powerline-email-tools]
url = "https://powerline.ai/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "ai-powerline-email-tools": {
      "type": "remote",
      "url": "https://powerline.ai/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add ai-powerline-email-tools --url 'https://powerline.ai/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  ai-powerline-email-tools:
    url: "https://powerline.ai/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "ai-powerline-email-tools": {
      "Transport": "http",
      "Url": "https://powerline.ai/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add ai-powerline-email-tools -t streamable-http -u 'https://powerline.ai/mcp'
```

### Other

```json
{
  "mcpServers": {
    "ai-powerline-email-tools": {
      "type": "http",
      "url": "https://powerline.ai/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.

### 2026-11-01 (score 83, 0)

- [security] Stability: 0.97 → pass

### 2026-10-31 (score 83, +1)

No change was recorded against any check on this day. Stability & Change Management went from 93 to 97. That category is still filling its 30-day observation window: 28 days of observed history at the previous scan, 29 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-29 (score 82, +1)

No change was recorded against any check on this day. Stability & Change Management went from 87 to 90. That category is still filling its 30-day observation window: 26 days of observed history at the previous scan, 27 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-27 (score 81, +1)

No change was recorded against any check on this day. Stability & Change Management went from 80 to 83. That category is still filling its 30-day observation window: 24 days of observed history at the previous scan, 25 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-25 (score 80, +1)

No change was recorded against any check on this day. Stability & Change Management went from 73 to 77. That category is still filling its 30-day observation window: 22 days of observed history at the previous scan, 23 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-22 (score 79, +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.

### 2026-10-20 (score 78, +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.

### 2026-10-18 (score 77, +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.

## MCP tools (5)

### `check_domain` (~145 tokens)

Email domain health check

Run every email-authentication check on a domain (SPF, DKIM, DMARC, MX, MTA-STS, TLS-RPT, BIMI, plus domain and mail-server blacklists) and return a score out of 100, per-check findings and a prioritized fix list. Use this first when asked whether a domain is set up correctly to send email.

Input parameters:

- `dkim_selector` (string): DKIM selector (the s= value from a DKIM-Signature header). Optional; common selectors are tried when omitted.
- `domain` (string, required): Domain name, e.g. example.com. URLs and email addresses are accepted; the domain part is used.

### `check_record` (~184 tokens)

Check one DNS email record

Look up and validate a single email DNS record for a domain, explaining each tag. record is one of spf, dmarc, dkim, bimi, mta-sts, tls-rpt, mx. SPF counts the 10-lookup limit; DMARC checks policy, reporting and external report authorization; DKIM sizes the key; MTA-STS fetches the policy file and compares it with the MX hosts; BIMI checks the logo (SVG Tiny PS) and mark certificate.

Input parameters:

- `domain` (string, required): Domain name, e.g. example.com. URLs and email addresses are accepted; the domain part is used.
- `policy` (string): MTA-STS only: policy file text to check instead of fetching it. Optional.
- `record` (string, required)
- `selector` (string): DKIM or BIMI selector. Optional.

### `check_blacklists` (~93 tokens)

DNS blacklist lookup

Check an IPv4 address against about 18 IP blacklists (SpamCop, Barracuda, UCEPROTECT, PSBL, Mailspike, ...) or a domain against domain blacklists. Each list is verified with its test entries first, so lists that refuse public resolvers (such as Spamhaus) are reported as unavailable rather than clean.

Input parameters:

- `target` (string, required): IPv4 address or domain.

### `analyze_headers` (~80 tokens)

Email header analyzer

Parse raw email headers: the Received delivery path with per-hop delays, the receiving server's SPF/DKIM/DMARC verdicts, DMARC alignment of the From domain, DKIM signatures, the sending IP, and bulk-sender requirements such as one-click unsubscribe.

Input parameters:

- `headers` (string, required): The raw header block (everything above the message body).

### `check_spam_words` (~104 tokens)

Email copy spam check

Scan an email subject and body (plain text or HTML) for spam-trigger phrases by category, ALL-CAPS, exclamation runs, emoji, URL shorteners and image-heavy HTML. Returns a low/medium/high risk reading and, optionally, a rule-based rewrite.

Input parameters:

- `body` (string): Plain text or HTML.
- `rewrite` (boolean): Also return a calmer rewrite of the subject (and of a plain-text body).
- `subject` (string)

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/ai-powerline-email-tools/powerline#diagnostics

## Score history

- 2026-11-05: 83
- 2026-11-04: 83
- 2026-11-03: 83
- 2026-11-02: 83
- 2026-11-01: 83
- 2026-10-31: 83
- 2026-10-30: 82
- 2026-10-29: 82
- 2026-10-28: 81
- 2026-10-27: 81
- 2026-10-26: 80
- 2026-10-25: 80
- 2026-10-24: 79
- 2026-10-23: 79
- 2026-10-22: 79
- 2026-10-21: 78
- 2026-10-20: 78
- 2026-10-19: 77
- 2026-10-18: 77
- 2026-10-17: 76
- 2026-10-16: 76
- 2026-10-15: 75
- 2026-10-14: 75
- 2026-10-13: 74
- 2026-10-12: 74
- 2026-10-11: 73
- 2026-10-10: 73
- 2026-10-05: 71
- 2026-10-04: 70
- 2026-10-03: 70

## Common questions

### What is the Powerline Email Tools MCP server?

Powerline Email Tools is an MCP server listed in the public MCP registry as ai.powerline/email-tools. Email deliverability checks: SPF, DKIM, DMARC, BIMI, MTA-STS, blacklists, headers, spam words. This page covers its hosted endpoint (https://powerline.ai/mcp).

### Is the Powerline Email Tools MCP server safe to use?

Powerline Email Tools scores 83 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 Powerline Email Tools MCP server expose?

Powerline Email Tools exposes 5 tools: check_domain, check_record, check_blacklists, analyze_headers, check_spam_words. Their descriptions and schemas cost roughly 606 tokens of context every time the server is loaded.

### Does the Powerline Email Tools MCP server require authentication?

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

### Is the Powerline Email Tools MCP server still maintained?

Powerline Email Tools is still listed as active in the MCP registry. We last reached this channel on 5 November 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://powerline.ai/mcp
- Website: https://powerline.ai/tools/
- Changelog RSS feed: https://verifymcp.io/servers/ai-powerline-email-tools/powerline.xml
- Changelog JSON feed: https://verifymcp.io/servers/ai-powerline-email-tools/powerline.json
- HTML version of this page: https://verifymcp.io/servers/ai-powerline-email-tools/powerline