# io.github.heungmangoo-art/saju (npm · saju-mcp-server)

Korean Four Pillars (Saju) astrology — birth charts, Day Masters, Five Elements, compatibility

- Trust score: 61/100 (medium)
- Change this week: +24
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-08-03

## Components

- npm · `saju-mcp-server`: 61/100 (this document), [markdown](https://verifymcp.io/servers/heungmangoo-art-saju/saju-mcp-server.md), [page](https://verifymcp.io/servers/heungmangoo-art-saju/saju-mcp-server)

## Channel facts

- Registry: `npm`
- Package: `saju-mcp-server`
- 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**: 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 119 days ago).
  - Security-disclosure policy not yet verified: we couldn't inspect the source repository.
- **Schema Quality & AI Usability**: 71/100
  - AI-judged instruction clarity (good).
  - Tool/resource definitions use about 418 tokens (~104/item across 4 items; 4 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**: 79/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 38% 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 heungmangoo-art-saju -- npx -y saju-mcp-server
```

### Codex

```bash
codex mcp add heungmangoo-art-saju -- npx -y saju-mcp-server
```

### opencode

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

### OpenClaw

```bash
openclaw mcp add heungmangoo-art-saju --command npx --arg -y --arg saju-mcp-server
```

### Hermes

```yaml
mcp_servers:
  heungmangoo-art-saju:
    command: "npx"
    args: ["-y", "saju-mcp-server"]
```

### Other

```json
{
  "mcpServers": {
    "heungmangoo-art-saju": {
      "command": "npx",
      "args": [
        "-y",
        "saju-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.

### 2026-08-03 (score 61, +4)

- [functional improvement] Stability: unverified → 0.27

### 2026-08-02 (score 57, +57)

- [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] License: unverified → pass
- [functional improvement] Dependency health: unverified → partial
- [functional improvement] Maintenance: unverified → pass
- [functional improvement] MCP protocol: unverified → pass
- [functional improvement] Schema quality: unverified → good
- [functional improvement] Tool coverage: unverified → 100
- [functional] Licence: MIT

### 2026-08-01 (score 0, −2)

- [functional regression] Dependency health: partial → unverified

### 2026-07-31 (score 2, +2)

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

### 2026-07-30 (score 0, −37)

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

### 2026-07-27 (score 37)

First indexed and scored.

## MCP tools (4)

### `calculate_saju` (~137 tokens)

Calculate Korean Four Pillars (Saju/사주) birth chart from a date of birth. Returns pillars in Hanja and Korean, Day Master, zodiac animal, Five Elements balance, and energy flow.

Input parameters:

- `day` (integer, required): Birth day (1-31, solar calendar)
- `gender` (string): Gender for energy flow calculation (default: other)
- `hour` (integer): Birth hour (0-23, optional — omit if unknown)
- `month` (integer, required): Birth month (1-12, solar calendar)
- `year` (integer, required): Birth year (solar calendar, e.g. 1995)

### `get_day_master` (~101 tokens)

Look up the personality profile for any of the 10 Day Masters (일간/日干) in Korean Saju astrology. Pass a Heavenly Stem character (甲乙丙丁戊己庚辛壬癸) to get the archetype, image, and personality traits.

Input parameters:

- `stem` (string, required): Heavenly Stem in Hanja (one of: 甲乙丙丁戊己庚辛壬癸)

### `check_compatibility` (~129 tokens)

Compare two people's Saju charts for compatibility. Analyzes Day Master element harmony, zodiac (Six Harmony / Six Clash), and elemental complements.

Input parameters:

- `person1_day` (integer, required)
- `person1_gender` (string)
- `person1_hour` (integer)
- `person1_month` (integer, required)
- `person1_year` (integer, required)
- `person2_day` (integer, required)
- `person2_gender` (string)
- `person2_hour` (integer)
- `person2_month` (integer, required)
- `person2_year` (integer, required)

### `list_stems_and_branches` (~51 tokens)

Reference table: all 10 Heavenly Stems (천간) and 12 Earthly Branches (지지) with Hanja, Korean, English, element, and yin/yang.

## Diagnostics

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

## Score history

- 2026-08-03: 61
- 2026-08-02: 57
- 2026-08-01: 0
- 2026-07-31: 2
- 2026-07-30: 0
- 2026-07-28: 37
- 2026-07-27: 37

## Links

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