# co.truncus/mcp-server (npm · @truncus/mcp-server)

Send transactional emails from AI agents via Truncus. Validate, track delivery, and manage domains.

- Trust score: 60/100 (medium)
- Change this week: +20
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-08-03

## Components

- npm · `@truncus/mcp-server`: 60/100 (this document), [markdown](https://verifymcp.io/servers/co-truncus-mcp-server/truncus-mcp-server.md), [page](https://verifymcp.io/servers/co-truncus-mcp-server/truncus-mcp-server)

## Channel facts

- Registry: `npm`
- Package: `@truncus/mcp-server`
- Version: `0.1.1`
- 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**: 19/100
  - Repository check failed: the declared repository URL returned HTTP 404.
  - Provenance check failed: no build-provenance attestation is published.
  - Clear OSI-approved license (MIT).
  - Actively maintained (last published 150 days ago).
  - Security-disclosure policy not yet verified: we couldn't inspect the source repository.
- **Schema Quality & AI Usability**: 75/100
  - AI-judged instruction clarity (good).
  - Tool/resource definitions use about 314 tokens (~52/item across 6 items; 6 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 0/100
  - Stability not yet verified: not enough scan history yet (needs a 30-day window).
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% of tool parameters carry a description.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

**Unverified: 1 category.** A category scored 0 because we could not verify it: a data source with nothing on this package, evidence we could not reach, or a check we could not run. We only credit what we can confirm.

## Install

### Claude

```bash
claude mcp add co-truncus-mcp-server -- npx -y @truncus/mcp-server
```

### Codex

```bash
codex mcp add co-truncus-mcp-server -- npx -y @truncus/mcp-server
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "co-truncus-mcp-server": {
      "type": "local",
      "command": [
        "npx",
        "-y",
        "@truncus/mcp-server"
      ],
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add co-truncus-mcp-server --command npx --arg -y --arg @truncus/mcp-server
```

### Hermes

```yaml
mcp_servers:
  co-truncus-mcp-server:
    command: "npx"
    args: ["-y", "@truncus/mcp-server"]
```

### Other

```json
{
  "mcpServers": {
    "co-truncus-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@truncus/mcp-server"
      ]
    }
  }
}
```

## 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 60, +44)

- [security regression] Provenance: unverified → fail
- [security improvement] Install scripts: unverified → pass
- [security improvement] Known CVEs: unverified → partial
- [security improvement] Malware scan: unverified → pass
- [security] Stability: Stability not yet verified: not enough scan history yet (needs a 30-day window).
- [functional improvement] Maintenance: unverified → pass
- [functional improvement] MCP protocol: unverified → pass
- [functional improvement] Schema quality: unverified → good
- [functional improvement] License: unverified → pass
- [functional improvement] Dependency health: unverified → partial
- [functional] Licence: MIT

### 2026-07-31 (score 16, −24)

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

### 2026-07-27 (score 40)

First indexed and scored.

## MCP tools (6)

### `truncus_send_email` (~91 tokens)

Send a transactional email to a single recipient. Requires a verified sending domain.

Input parameters:

- `from` (string, required): Sender email address (must be a verified Truncus domain)
- `html` (string, required): HTML body of the email
- `subject` (string, required): Email subject line
- `text` (string): Plain-text fallback body (recommended for accessibility)
- `to` (string, required): Recipient email address

### `truncus_validate_email` (~73 tokens)

Dry-run: validate an email payload without delivering it. Checks domain, suppression list, and rate limits.

Input parameters:

- `from` (string, required): Sender email address
- `html` (string, required): HTML body of the email
- `subject` (string, required): Email subject line
- `to` (string, required): Recipient email address

### `truncus_get_email` (~42 tokens)

Get status and engagement metrics (opens, clicks) for a sent email.

Input parameters:

- `email_id` (string, required): The email ID returned from truncus_send_email

### `truncus_get_stats` (~55 tokens)

Get aggregated email sending statistics for the account.

Input parameters:

- `days` (number): Lookback window in days (1–90, default 30)
- `granularity` (string): Time series granularity (default: day)

### `truncus_list_domains` (~19 tokens)

List all verified sending domains for the account.

### `truncus_check_suppression` (~34 tokens)

Check if an email address is on the suppression list.

Input parameters:

- `email` (string, required): Email address to check

## Diagnostics

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

## Score history

- 2026-08-03: 60
- 2026-08-02: 60
- 2026-08-01: 16
- 2026-07-31: 16
- 2026-07-30: 40
- 2026-07-28: 40
- 2026-07-27: 40

## Links

- npm package: https://www.npmjs.com/package/@truncus/mcp-server
- Socket report: https://socket.dev/npm/package/@truncus/mcp-server
- Changelog RSS feed: https://verifymcp.io/servers/co-truncus-mcp-server/truncus-mcp-server/changelog.xml
- Changelog JSON feed: https://verifymcp.io/servers/co-truncus-mcp-server/truncus-mcp-server/changelog.json
- HTML version of this page: https://verifymcp.io/servers/co-truncus-mcp-server/truncus-mcp-server