# io.github.coopergwrenn/postals-mcp (npm · postals-mcp)

Send physical handwritten postcards from any AI agent. Real pen & ink, USPS, $4.99/card.

- Trust score: 53/100 (low)
- Change this week: +18
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-08-03

## Components

- npm · `postals-mcp`: 53/100 (this document), [markdown](https://verifymcp.io/servers/coopergwrenn-postals-mcp/postals-mcp.md), [page](https://verifymcp.io/servers/coopergwrenn-postals-mcp/postals-mcp)

## Channel facts

- Registry: `npm`
- Package: `postals-mcp`
- Version: `1.0.0`
- 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**: 87/100
  - No malware found by supply-chain analysis.
  - Only part of the dependency tree could be resolved (95 of 99), 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 (95 of 99), 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 105 days ago).
  - Security-disclosure policy not yet verified: we couldn't inspect the source repository.
- **Schema Quality & AI Usability**: 40/100
  - 0% of prompts and resources have a non-trivial description (not blank, and not just the item's name).
  - AI-judged instruction clarity (excellent).
  - Context-footprint check failed: tool/resource definitions use about 622 tokens (~311/item across 2 items; 2 tools + 0 resources), over budget; trim descriptions and params.
  - 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 coopergwrenn-postals-mcp -- npx -y postals-mcp
```

### Codex

```bash
codex mcp add coopergwrenn-postals-mcp -- npx -y postals-mcp
```

### opencode

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

### OpenClaw

```bash
openclaw mcp add coopergwrenn-postals-mcp --command npx --arg -y --arg postals-mcp
```

### Hermes

```yaml
mcp_servers:
  coopergwrenn-postals-mcp:
    command: "npx"
    args: ["-y", "postals-mcp"]
```

### Other

```json
{
  "mcpServers": {
    "coopergwrenn-postals-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "postals-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 53, +53)

- [security regression] Provenance: unverified → fail
- [security improvement] Known CVEs: unverified → partial
- [security improvement] Install scripts: unverified → pass
- [security improvement] Malware scan: unverified → pass
- [security] Stability: Stability not yet verified: not enough scan history yet (needs a 30-day window).
- [functional improvement] MCP protocol: unverified → pass
- [functional improvement] Maintenance: unverified → pass
- [functional improvement] Schema quality: unverified → 0
- [functional improvement] License: unverified → pass
- [functional improvement] Tool coverage: unverified → 100
- [functional improvement] Schema quality: unverified → excellent
- [functional improvement] Dependency health: unverified → partial
- [functional] Licence: MIT

### 2026-08-01 (score 0, −17)

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

### 2026-07-31 (score 17, −18)

- [security regression] Malware scan: pass → unverified

### 2026-07-30 (score 35, +17)

- [functional improvement] Tool coverage: unverified → 100
- [functional improvement] Schema quality: unverified → 0

### 2026-07-28 (score 18, −17)

- [functional regression] Schema quality: 0 → unverified
- [functional regression] Tool coverage: 100 → unverified

### 2026-07-27 (score 35)

First indexed and scored.

## MCP tools (2)

### `send_postcard` (~367 tokens)

Send a physical handwritten postcard to a US mailing address. Postals prints it with real robotic handwriting (pen and ink) and mails it via USPS. Delivery in 3-5 business days. Cost: $4.99 per card. Provide the recipient's address, a message (max 400 chars), and optionally an image URL for the card front. If no image is provided, uses the configured default card.

Input parameters:

- `front_image_url` (string): Public HTTPS URL of the image for the card front (PNG or JPEG, landscape 7x5 preferred). If omitted, uses POSTALS_DEFAULT_CARD_IMAGE.
- `handwriting_style` (string): Handwriting font name. Default: "Joyful Jennifer". Other options depend on your Handwrytten account.
- `idempotency_key` (string): Unique key to prevent duplicate sends on retries. If a prior send with this key succeeded, returns the original result without sending a new card. Recommended for autonomous agents.
- `message` (string, required): The handwritten message for the back of the card. Max 400 characters. Keep it personal and concise.
- `return_address` (object): Sender's return address. If omitted, uses POSTALS_SENDER_* env defaults.
- `to_address` (string, required): Street address line 1
- `to_address_2` (string): Street address line 2 (apt, suite, etc.)
- `to_city` (string, required): City
- `to_name` (string, required): Recipient's full name (e.g. 'Jane Smith')
- `to_state` (string, required): Two-letter US state code (e.g. CA, NY, TX)
- `to_zip` (string, required): 5-digit ZIP code (e.g. 78701 or 78701-1234)

### `generate_message` (~175 tokens)

Generate a personalized handwritten message for a postcard based on context about the recipient. Returns a ready-to-use message you can pass directly to send_postcard. Uses AI if Cloudflare credentials are configured (CLOUDFLARE_ACCOUNT_ID + CLOUDFLARE_API_TOKEN); otherwise returns a structured prompt you can use to compose the message yourself.

Input parameters:

- `max_chars` (number): Max character count for the message
- `recipient_context` (string, required): Who the recipient is and why you're writing. Example: 'John Smith, homeowner at 123 Oak St. Sending a before/after postcard showing what a pool would look like in his backyard.'
- `sender_context` (string): Who is sending the card. Example: 'Blue Wave Pools — local pool builder in Austin, TX'
- `tone` (string): Message tone

## Diagnostics

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

## Score history

- 2026-08-03: 53
- 2026-08-02: 53
- 2026-08-01: 0
- 2026-07-31: 17
- 2026-07-30: 35
- 2026-07-28: 18
- 2026-07-27: 35

## Links

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