MCP server

Yarrow

io.github.shaozhengkun123/yarrow

Checked 26 Oct 2026, 08:29 UTC · Connected to it and listed its tools

I-Ching (周易) oracle: cast a hexagram, read classical commentary, get a reflection. Bilingual.

Source

At a glance

Type

MCP server

Publisher

Not verified

Status

Working at last check

Tools

7

Token cost

About 1,690 tokens per request

Sets up in

Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok

Last checked

26 Oct 2026, 08:29 UTC

Connect it to your agent

Add to CursorAdd to VS CodeVS Code Insiders

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http yarrow https://yarrow-oracle.shaozhengkun.workers.dev/mcp

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.yarrow]
url = "https://yarrow-oracle.shaozhengkun.workers.dev/mcp"

Gemini CLI

{"mcpServers":{"yarrow":{"httpUrl":"https://yarrow-oracle.shaozhengkun.workers.dev/mcp"}}}

Cursor

{"mcpServers":{"yarrow":{"url":"https://yarrow-oracle.shaozhengkun.workers.dev/mcp"}}}

VS Code

{"servers":{"yarrow":{"type":"http","url":"https://yarrow-oracle.shaozhengkun.workers.dev/mcp"}}}

Antigravity

agy mcp add yarrow https://yarrow-oracle.shaozhengkun.workers.dev/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"yarrow","server_url":"https://yarrow-oracle.shaozhengkun.workers.dev/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"yarrow","server_url":"https://yarrow-oracle.shaozhengkun.workers.dev/mcp"}

Tools

• cast_hexagram ~256 tokens
  Cast a hexagram for an I-Ching consultation. Returns the primary hexagram, the six lines (6=old yin, 7=young yang, 8=young yin, 9=old yang from bottom to top), any moving lines, and the changing hexagram if there are moving lines. Pass `seed` to make the cast deterministic (useful for testing or for
• cast_tarot ~156 tokens
  Draw one upright Major Arcana card for reflection. Uses a deterministic one-card Waite-Smith Major Arcana method and returns a selected source excerpt from Arthur Edward Waite's public-domain 1910/1922 text. Pass `seed` to reproduce the same draw.
• divine ~345 tokens
  Ask the I Ching. See your next step. Cast a hexagram, show the classical sources first, then offer a thoughtful reflection grounded in those sources. Sources first. Reflection, not prediction. The divine name remains stable for oracle/divination client compatibility. Supports English, Chinese, Japan
• lookup_hexagram ~210 tokens
  Return the full classical sources for a hexagram by its number (1–64): judgment (卦辞), image (大象), Tuan commentary, Zhu Xi 周易本义, Yang Tian Cai modern explanation, Yarrow's separately labelled Chinese reading aid, and historical anecdote — with available Chinese and English source material.
• lookup_yilin ~140 tokens
  Look up the 焦氏易林 verse for a primary hexagram changing into another hexagram. This is a local classical-source lookup, not an AI reading.
• tarot_reading ~259 tokens
  Ask one real question through a single upright Waite-Smith Major Arcana card. Returns a direct calibrated answer first, the named card and bound Arthur Edward Waite 1910 source excerpt, a practical reality check, and one observable next step. No reversals, astrology, redraw loop, or guaranteed predi
• two_lenses ~324 tokens
  Bring one real question to two independent symbolic traditions: a source-first I-Ching cast and one upright Waite-Smith Major Arcana card. Returns a clear calibrated answer first, then five grounded sections covering the I Ching lens, Tarot lens, shared themes, different emphasis, and next step. Dir

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