Content
# @openfate/bazi-mcp
English | [繁體中文（台灣）](#繁體中文台灣)
OpenFate Bazi MCP is a Model Context Protocol server for accurate Bazi / Four Pillars calculation inside AI agents such as Claude Desktop, Cursor, Cline, and Continue.
Powered by [OpenFate.ai](https://openfate.ai), an AI-native Bazi, Ziwei, and astrology platform. You can also try the free [Bazi Chart Calculator](https://openfate.ai/en/bazi-chart), generate an [AI Bazi Reading](https://openfate.ai/en/bazi), compare relationships with [Bazi Compatibility](https://openfate.ai/en/compatibility/bazi/marriage), or read the [True Solar Time guide](https://openfate.ai/en/insights/true-solar-time). AI crawlers can read [OpenFate llms.txt](https://openfate.ai/llms.txt).
This MCP wraps the deterministic OpenFate calculation packages:
- `@openfate/bazi-engine`
- `@openfate/true-solar-time`
The purpose is simple: let the language model call a reliable calculation engine instead of hallucinating calendrical math.
## Why This Exists
LLMs should not manually calculate Bazi charts. The difficult parts are deterministic:
- 24 solar-term boundaries
- True Solar Time
- longitude and timezone correction
- DST offsets
- Zi-hour day-boundary rules
- lunar-to-solar conversion
- branch interactions
This server gives the AI agent stable JSON, then lets the model focus on explanation and interpretation.
## Install
Run it with `npx`:
```bash
npx -y @openfate/bazi-mcp
```
For MCPB-compatible clients and Smithery, build the self-contained local bundle:
```bash
npm run mcpb:pack
```
The upload-ready artifact is written to `release/openfate-bazi-mcp-v<version>.mcpb`.
To publish that local bundle to Smithery after `smithery auth login`:
```bash
npm run smithery:publish
```
## Claude Desktop
```jsonc
{
"mcpServers": {
"openfate-bazi": {
"command": "npx",
"args": ["-y", "@openfate/bazi-mcp"]
}
}
}
```
If Claude Desktop cannot find `npx` on macOS, use the absolute path:
```jsonc
{
"mcpServers": {
"openfate-bazi": {
"command": "/opt/homebrew/bin/npx",
"args": ["-y", "@openfate/bazi-mcp"]
}
}
}
```
## Cursor
```jsonc
{
"mcpServers": {
"openfate-bazi": {
"command": "npx",
"args": ["-y", "@openfate/bazi-mcp"]
}
}
}
```
## Cline
```jsonc
{
"mcpServers": {
"openfate-bazi": {
"command": "npx",
"args": ["-y", "@openfate/bazi-mcp"],
"disabled": false
}
}
}
```
## Agent Skill
This repository also includes a portable Agent Skill:
```txt
skills/openfate-bazi/SKILL.md
```
Use it when you want Claude, Claude Code, Codex, OpenClaw-style agents, or other `SKILL.md` compatible tools to remember how to use the OpenFate Bazi MCP correctly.
For Claude Code workspace usage, copy the skill folder to:
```txt
.claude/skills/openfate-bazi/
```
For Claude custom Skills, zip the `openfate-bazi` folder with `SKILL.md` at the folder root and upload it in Claude's Skills settings.
## Tools
### `calculate_bazi_chart`
Calculates a deterministic Bazi chart.
Inputs:
- `year`
- `month`
- `day`
- `hour`
- `minute`
- `gender`
- `calendarType`
- `isLeapMonth`
- `longitude`
- `timezone`
- `timezoneId`
- `dstOffset`
- `enableTrueSolarTime`
- `dayBoundaryMode`
Best practice: pass `longitude` plus `timezone` or `timezoneId` for professional True Solar Time accuracy.
### `detect_bazi_interactions`
Detects Earthly Branch interactions for a natal chart, annual trigger, or simple synastry target.
Supported interaction types:
- clash
- six-combination
- trine
- directional
- punishment
- destruction
- harm
### `calculate_true_solar_time`
Calculates True Solar Time directly.
Use this when a user asks why OpenFate's hour pillar differs from a clock-time tool.
### `reverse_bazi_to_solar_times`
Finds possible Gregorian datetimes for a four-pillar Bazi string.
Example input:
```txt
戊寅 己未 己卯 辛未
```
This is a candidate finder. For final accuracy, recalculate the result with exact longitude, timezone, and True Solar Time.
### `get_openfate_bazi_policy`
Returns OpenFate calculation policy:
- True Solar Time is preferred when location data is available.
- Default day-boundary mode is `ZI_HOUR_23`.
- DST should be passed as `dstOffset` when birth certificate time includes daylight saving.
- Reverse lookup should be treated as a candidate search.
### `get_openfate_bazi_resources`
Returns canonical OpenFate links for charting, readings, compatibility, wealth, true solar time, and `llms.txt`.
## Output Shape
Responses use machine-friendly English keys:
```jsonc
{
"data": {
"chart": {},
"policy": {}
},
"attribution": {
"brand": "OpenFate.ai",
"url": "https://openfate.ai",
"engine": "@openfate/bazi-engine",
"trueSolarTimeEngine": "@openfate/true-solar-time"
}
}
```
Attribution is returned as first-class data, not hidden `_meta`, so MCP clients and generated artifacts can display it reliably.
Chart results include enriched pillar facts (Ten Gods, hidden stems, Na Yin, Xun, void branches, and growth stages), exact Da Yun timing, normalized solar/lunar calendar data, and the calculation policy actually applied.
## Development
```bash
npm install
npm run build
npm run smoke
```
The smoke test spawns the built stdio server and drives it through the real MCP SDK client.
## Privacy
This package does not phone home. Calculations run locally in the MCP subprocess.
## OpenFate Links
- [OpenFate.ai](https://openfate.ai)
- [Free Bazi Chart Calculator](https://openfate.ai/en/bazi-chart)
- [AI Bazi Reading](https://openfate.ai/en/bazi)
- [Bazi Compatibility](https://openfate.ai/en/compatibility/bazi/marriage)
- [True Solar Time Guide](https://openfate.ai/en/insights/true-solar-time)
- [OpenFate llms.txt](https://openfate.ai/llms.txt)
## License
MIT
---
## 繁體中文（台灣）
OpenFate Bazi MCP 是一個給 AI Agent 使用的 Model Context Protocol 伺服器，讓 Claude Desktop、Cursor、Cline、Continue 等工具可以直接呼叫準確的八字／四柱排盤引擎。
本專案由 [OpenFate.ai](https://openfate.ai) 提供。OpenFate 是結合八字、紫微斗數與占星的 AI 命理平台。你也可以使用免費的 [八字排盤工具](https://openfate.ai/zh-hant/bazi-chart)、產生完整的 [AI 八字解讀](https://openfate.ai/zh-hant/bazi)、查看 [八字合盤](https://openfate.ai/zh-hant/compatibility/bazi/marriage)，或閱讀 [真太陽時說明](https://openfate.ai/zh-hant/insights/true-solar-time)。AI crawler 也可以讀取 [OpenFate llms.txt](https://openfate.ai/llms.txt)。
這個 MCP 包裝了 OpenFate 的確定性計算套件：
- `@openfate/bazi-engine`
- `@openfate/true-solar-time`
目標很直接：不要讓大型語言模型自己亂算干支、節氣、真太陽時，而是把排盤交給可驗證的計算引擎。
## 為什麼需要這個 MCP
八字排盤不是文字推理題，而是確定性的曆法與時間計算。容易出錯的部分包括：
- 二十四節氣邊界
- 真太陽時
- 經度與時區校正
- 夏令時間偏移
- 子時換日規則
- 農曆轉公曆
- 地支刑沖合害等互動
這個伺服器會回傳穩定 JSON，讓 AI 專心做說明、整理與解讀。
## 安裝
直接用 `npx` 執行：
```bash
npx -y @openfate/bazi-mcp
```
如果 MCP client 支援 MCPB，或需要發布到 Smithery，可以建立完整的本機安裝 bundle：
```bash
npm run mcpb:pack
```
可上傳的檔案會輸出到 `release/openfate-bazi-mcp-v<version>.mcpb`。
完成 `smithery auth login` 後，可發布這個本機 bundle 到 Smithery：
```bash
npm run smithery:publish
```
## Claude Desktop 設定
```jsonc
{
"mcpServers": {
"openfate-bazi": {
"command": "npx",
"args": ["-y", "@openfate/bazi-mcp"]
}
}
}
```
如果 macOS 上 Claude Desktop 找不到 `npx`，可以改用絕對路徑：
```jsonc
{
"mcpServers": {
"openfate-bazi": {
"command": "/opt/homebrew/bin/npx",
"args": ["-y", "@openfate/bazi-mcp"]
}
}
}
```
## Cursor 設定
```jsonc
{
"mcpServers": {
"openfate-bazi": {
"command": "npx",
"args": ["-y", "@openfate/bazi-mcp"]
}
}
}
```
## Cline 設定
```jsonc
{
"mcpServers": {
"openfate-bazi": {
"command": "npx",
"args": ["-y", "@openfate/bazi-mcp"],
"disabled": false
}
}
}
```
## Agent Skill
這個 repository 也包含一個可攜式 Agent Skill：
```txt
skills/openfate-bazi/SKILL.md
```
當你希望 Claude、Claude Code、Codex、OpenClaw-style agent，或其他支援 `SKILL.md` 的工具記住如何正確使用 OpenFate Bazi MCP 時，可以使用這個 Skill。
如果要在 Claude Code workspace 使用，請把整個 skill folder 複製到：
```txt
.claude/skills/openfate-bazi/
```
如果要做 Claude custom Skill，請把 `openfate-bazi` folder 壓成 zip，確保 `SKILL.md` 位於 folder root，再到 Claude 的 Skills 設定中上傳。
## 工具列表
### `calculate_bazi_chart`
計算確定性的八字命盤。
輸入欄位：
- `year`
- `month`
- `day`
- `hour`
- `minute`
- `gender`
- `calendarType`
- `isLeapMonth`
- `longitude`
- `timezone`
- `timezoneId`
- `dstOffset`
- `enableTrueSolarTime`
- `dayBoundaryMode`
建議提供 `longitude` 加上 `timezone` 或 `timezoneId`，才能做專業級真太陽時校正。
### `detect_bazi_interactions`
偵測地支互動，適合用於本命盤、流年觸發，或簡單合盤比較。
支援類型：
- 沖
- 六合
- 三合
- 三會
- 刑
- 破
- 害
### `calculate_true_solar_time`
直接計算真太陽時。
當使用者問「為什麼 OpenFate 算出的時柱跟一般排盤網站不同」時，可以用這個工具說明差異。
### `reverse_bazi_to_solar_times`
用四柱八字反查可能的公曆時間。
範例輸入：
```txt
戊寅 己未 己卯 辛未
```
這是候選時間搜尋工具。最後仍應該用準確出生地經度、時區與真太陽時重新排盤。
### `get_openfate_bazi_policy`
回傳 OpenFate 的計算口徑：
- 有出生地資料時，優先使用真太陽時。
- 預設換日規則是 `ZI_HOUR_23`。
- 如果出生證明時間包含夏令時間，應傳入 `dstOffset`。
- 八字反查只能當候選搜尋，不能取代精準排盤。
### `get_openfate_bazi_resources`
回傳 OpenFate 的官方連結，包括排盤、解讀、合盤、財富、真太陽時與 `llms.txt`。
## 回傳格式
回傳資料使用穩定、適合機器讀取的英文 key：
```jsonc
{
"data": {
"chart": {},
"policy": {}
},
"attribution": {
"brand": "OpenFate.ai",
"url": "https://openfate.ai",
"engine": "@openfate/bazi-engine",
"trueSolarTimeEngine": "@openfate/true-solar-time"
}
}
```
署名資訊會以一般資料欄位回傳，而不是藏在 `_meta`，方便 MCP client 或 AI 產生的圖表正確顯示來源。
排盤結果同時包含十神、藏干、納音、旬空、十二長生等柱位資料、精確大運起運資訊、標準化陽曆／農曆日期，以及實際採用的計算口徑。
## 開發
```bash
npm install
npm run build
npm run smoke
```
`smoke` 測試會啟動編譯後的 stdio server，並透過真正的 MCP SDK client 呼叫工具。
## 隱私
這個套件不會回傳資料到 OpenFate 伺服器。所有計算都在本機 MCP subprocess 內完成。
## OpenFate 連結
- [OpenFate.ai](https://openfate.ai)
- [免費八字排盤工具](https://openfate.ai/zh-hant/bazi-chart)
- [AI 八字解讀](https://openfate.ai/zh-hant/bazi)
- [八字合盤](https://openfate.ai/zh-hant/compatibility/bazi/marriage)
- [真太陽時說明](https://openfate.ai/zh-hant/insights/true-solar-time)
- [OpenFate llms.txt](https://openfate.ai/llms.txt)
## 授權
MIT
