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Saju & BaZi (Four Pillars) charts, luck cycles, manseryeok and classics. Free with sign-in.
About
Saju & BaZi (Four Pillars) charts, luck cycles, manseryeok and classics. Free with sign-in.
Remote endpoints: streamable-http: https://mcp.24plus.ai.kr/mcp
Security Report
cafe-mcp is a Saju/BaZi astrology MCP server that forwards birth inputs over HTTPS to the vendor's public backend and returns structured chart data, with a hard-coded tool-to-preset allowlist, no bundled credentials, and stable error codes that avoid forwarding backend bodies. Main considerations are that birth data (personal information) leaves the user's machine by design, the remote endpoint is unauthenticated for free tools, and the summary.js file was truncated so its tail could not be fully reviewed; permissions match the stated purpose and no malicious patterns were found. Supply chain analysis found 1 known vulnerability in dependencies (0 critical, 1 high severity).
6 files analyzed · 7 issues found
Security scores are indicators to help you make informed decisions, not guarantees. Always review permissions before connecting any MCP server.
Permissions Required
This plugin requests these system permissions. Most are normal for its category.
How to Install & Connect
Available as Local & Remote
This plugin can run on your machine or connect to a hosted endpoint. during install.
Documentation
View on GitHubFrom the project's GitHub README.
cafe-mcp: Saju & BaZi (Four Pillars of Destiny) MCP server
Korean astrology (Saju, 사주) and Chinese BaZi (八字) for AI agents. Computed, not guessed. Give Claude, ChatGPT, Cursor or any MCP client a birth date and time. cafe-mcp returns the Four Pillars chart, luck cycles, a manseryeok (만세력) calendar and the classical texts as structured, reproducible data from the CAFE engine. Your AI writes the reading in the user's language.
Why not just ask the LLM? A general model improvises the chart: the same birth data gives a different Day Master on different days, and solar-term boundaries, hidden stems and luck cycles are routinely wrong. cafe-mcp calculates them with an engine built since 2019: solar terms to the second, birthplace longitude, historical time zones and daylight saving. Same input, same chart, every time.
Quick start
Server URL:
https://mcp.24plus.ai.kr/mcp
claude.ai, Claude apps, ChatGPT: add a custom connector with the URL above, sign in to 24PLUS, then allow. No key needed.
Claude Code, Cursor and other clients: either add the URL and sign in (OAuth), or create a key at https://24plus.ai.kr/my and send it as a bearer token:
claude mcp add --transport http cafe-mcp https://mcp.24plus.ai.kr/mcp --header "Authorization: Bearer mcp_live_..."
{ "mcpServers": { "cafe-mcp": { "url": "https://mcp.24plus.ai.kr/mcp", "headers": { "Authorization": "Bearer mcp_live_..." } } } }
Disconnect any time from My account > Connected AI.
Plans
| Free | Plus (launching soon) | |
|---|---|---|
| Different charts per month | 10 | 100 |
| Tool calls per month | 300 | 3,000 |
| Calls per minute | 20 | 60 |
| Engine judgments (structure, useful element, luck index) | – | ✓ |
| Classics | 3 results, translation excerpt, table of contents | 10 results, full translation, full chapters |
A chart you have already looked up does not count again. Details: https://24plus.ai.kr/pricing
Tools
| Tool | Plan | What it does |
|---|---|---|
saju_chart | Free | Four pillars with Hanja, Five Elements, Ten Gods, hidden stems, twelve life stages, stars, combinations, clashes and void |
luck_cycles | Free | Ten-year cycles with start ages, yearly and monthly pillars |
saju_reading_context | Free | Chart facts, current luck, term meanings and reading principles in one prompt-ready bundle. The best first call for a reading |
manse_calendar | Free | A month of solar and lunar dates, day pillars, exact solar-term times, auspicious days |
find_dates_by_pillars | Free | Reverse lookup: the dates and times that produce given pillars |
find_birthplace | Free | City search for longitude correction (births outside Korea) |
lookup_term | Free | 980 Saju terms in Korean, Hanja and English |
search_classics | Free | Ziping Zhenquan, Ditian Sui, Qiongtong Baojian and more, original with Korean translation |
read_classic | Free | The library and each book's table of contents (full chapters on Plus) |
chart_structure | Plus | Day Master strength (1 to 5) with its basis, element ratios, structure pattern, climate |
useful_element | Plus | Useful element candidates by five classical methods and the engine's pick |
luck_index | Plus | A 1 to 5 level for each cycle, year or month, with the reasons |
Full reference with inputs and example prompts: https://24plus.ai.kr/docs/tools
Values come back in Korean with Hanja; pass lang="en" for English term names.
Principles
- Calculation is deterministic; interpretation is left to your AI, grounded in the returned data.
- No scores or fixed predictions in the free tools. Levels describe the strength of a tendency.
- Birth data is used only for the calculation. The server keeps a one-way fingerprint for the monthly chart count, never the birth date itself. See PRIVACY.md.
Before v1.1.0
Until 2026-10-18 this URL served an open server with six tools and no sign-in, and the npm package
@dangamsoft/cafe-mcp ran it locally over stdio. Both are retired; the npm package is deprecated.
See CHANGELOG.md.
About
cafe-mcp is run by 24PLUS (Dangamsoft, Korea), built on the CAFE engine. Website: https://24plus.ai.kr · Business API (Core API): https://24plus.ai.kr/mcp#business
License: Apache-2.0 for the code in this repository.
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