# io.github.closermethod/newsletter-growth-mcp (npm · newsletter-growth-mcp)

Newsletter growth loops, welcome-sequence architecture, subject-line and list-metric guidance.

- Trust score: 64/100 (medium)
- Change this week: +20
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-08-03

## Components

- npm · `newsletter-growth-mcp`: 64/100 (this document), [markdown](https://verifymcp.io/servers/closermethod-newsletter-growth-mcp/newsletter-growth-mcp.md), [page](https://verifymcp.io/servers/closermethod-newsletter-growth-mcp/newsletter-growth-mcp)

## Channel facts

- Registry: `npm`
- Package: `newsletter-growth-mcp`
- Version: `1.0.1`
- Transport: `stdio`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, 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 2026-08-03.

- **Supply Chain Security**: 86/100
  - No malware found by supply-chain analysis.
  - Only part of the dependency tree could be resolved (94 of 98), so this covers what we could see, not the whole tree.
  - No install/post-install scripts declared.
  - Only part of the dependency tree could be resolved (94 of 98), so this covers what we could see, not the whole tree.
- **Provenance & Transparency**: 45/100
  - Source repository is publicly reachable at the declared URL.
  - Provenance check failed: no build-provenance attestation is published.
  - Clear OSI-approved license (MIT).
  - Actively maintained (last published 19 days ago).
  - Disclosure check failed: no security disclosure policy was found in the source repository.
- **Schema Quality & AI Usability**: 60/100
  - AI-judged instruction clarity (fair).
  - Tool/resource definitions use about 337 tokens (~56/item across 6 items; 6 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 27/100
  - Stability observed for 8 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 83/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 50% of tool parameters carry a description.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### Claude

```bash
claude mcp add closermethod-newsletter-growth-mcp -- npx -y newsletter-growth-mcp
```

### Codex

```bash
codex mcp add closermethod-newsletter-growth-mcp -- npx -y newsletter-growth-mcp
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "closermethod-newsletter-growth-mcp": {
      "type": "local",
      "command": [
        "npx",
        "-y",
        "newsletter-growth-mcp"
      ],
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add closermethod-newsletter-growth-mcp --command npx --arg -y --arg newsletter-growth-mcp
```

### Hermes

```yaml
mcp_servers:
  closermethod-newsletter-growth-mcp:
    command: "npx"
    args: ["-y", "newsletter-growth-mcp"]
```

### Other

```json
{
  "mcpServers": {
    "closermethod-newsletter-growth-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "newsletter-growth-mcp"
      ]
    }
  }
}
```

## 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.

### 2026-08-02 (score 64, +45)

- [security regression] Provenance: unverified → fail
- [security improvement] Install scripts: unverified → pass
- [security improvement] Known CVEs: unverified → partial
- [security improvement] Malware scan: unverified → pass
- [functional regression] Tool coverage: 100 → unverified
- [functional improvement] License: unverified → pass
- [functional improvement] Schema quality: unverified → fair
- [functional improvement] Maintenance: unverified → pass
- [functional improvement] MCP protocol: unverified → pass
- [functional improvement] Stability: unverified → 0.23
- [functional improvement] Dependency health: unverified → partial
- [functional] Licence: MIT

### 2026-07-31 (score 19, −5)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-07-30 (score 24, −20)

- [functional regression] Tool coverage: 100 → unverified
- [functional] First check of Schema quality: unverified

### 2026-07-27 (score 44)

First indexed and scored.

## MCP tools (6)

### `get_growth_loop` (~64 tokens)

Get a newsletter growth loop with mechanism, when it wins, execution rules, and failure mode. Loops: lead_magnet, social_repurpose, cross_promo, referral, sponsorship_swap. Omit for all loops + selection logic.

Input parameters:

- `loop` (string)

### `get_welcome_sequence` (~50 tokens)

The 6-email welcome sequence architecture: per-email job, timing, and subject shape (deliver → receipt → quick win → segment → soft offer → close), plus the one-job-per-email rules.

### `audit_subject_line` (~49 tokens)

Audit an email subject line: mobile truncation length, all-caps, spam phrases, fake Re:/Fwd:, specificity. Returns PASS/NEEDS WORK.

Input parameters:

- `subject` (string, required)

### `interpret_list_metric` (~50 tokens)

Interpret a list metric against practitioner ranges: open_rate, click_rate, growth_rate, unsubscribe_rate, reply_rate. Returns healthy range, warning threshold, and the diagnostic.

Input parameters:

- `metric` (string, required)

### `get_monetization_readiness` (~98 tokens)

Given subscriber count (and optionally open/click rates as percents), returns readiness verdicts for the three monetization paths: own product, per-click sponsorships, flat-rate placements, with sequencing. Engagement monetizes; size impresses.

Input parameters:

- `click_rate` (number): Optional: average click rate percent
- `open_rate` (number): Optional: average open rate percent
- `subscribers` (number, required): Current list size

### `get_full_pack` (~26 tokens)

The complete newsletter library in one payload: growth loops, welcome sequence, metric reads.

## Diagnostics

Captured diagnostic sections: Provenance, Dependencies. The full working is on the page: https://verifymcp.io/servers/closermethod-newsletter-growth-mcp/newsletter-growth-mcp#diagnostics

## Score history

- 2026-08-03: 64
- 2026-08-02: 64
- 2026-08-01: 19
- 2026-07-31: 19
- 2026-07-30: 24
- 2026-07-28: 44
- 2026-07-27: 44

## Links

- npm package: https://www.npmjs.com/package/newsletter-growth-mcp
- Socket report: https://socket.dev/npm/package/newsletter-growth-mcp
- Repository: https://github.com/closermethod/newsletter-growth-mcp
- Changelog RSS feed: https://verifymcp.io/servers/closermethod-newsletter-growth-mcp/newsletter-growth-mcp/changelog.xml
- Changelog JSON feed: https://verifymcp.io/servers/closermethod-newsletter-growth-mcp/newsletter-growth-mcp/changelog.json
- HTML version of this page: https://verifymcp.io/servers/closermethod-newsletter-growth-mcp/newsletter-growth-mcp