@pipeworx/i-ching

Connect: https://pipeworx.io/mcp — every tool in the catalog, including @pipeworx/i-ching’s. Install: one-click buttons

No MCP client? Skip the connection: POST https://gateway.pipeworx.io/v1/tools/search_packs {"query":"..."} to find a tool below, GET /v1/tools/<name> for its schema, POST the same URL with arguments for the data — see For AI agents.

Tools: 3

Cast the I Ching with the traditional three-coin or yarrow-stalk method, or look up any of the 64 hexagrams (King Wen sequence) directly. Every hexagram’s judgment, image and six line texts are original text written for this pack.

Tools

• cast_i_ching({ method?, question?, seed? }) — casts six lines (coins by default, or yarrow), returns the primary hexagram, any changing lines with their texts, and the resulting hexagram after those lines flip (null if none changed). seed is always returned at the top level of the result; pass it back with the same method to replay the exact cast. meta carries the shared chance-engine envelope (seed, procedure, deck, source) for citation, matching the convention used across this pack family (e.g. dice-roller). question is echoed back verbatim and never interpreted — the calling agent reads the hexagram and line texts and draws its own conclusion.
• get_hexagram({ number?, name? }) — full text for one hexagram by King Wen number (1-64) or by name (Chinese, pinyin, or the English gloss used here).
• search_hexagrams({ query }) — free-text search over names and keywords (e.g. “thunder”, “patience”, “withdrawal”); returns short summaries, use get_hexagram for the full text of a match.

Auth

Keyless. No upstream, no API key, no COGS.

Content and sourcing

All 64 hexagrams are inline in this pack (src/hexagrams.ts, ~70 KB — well under the 150 KB threshold where content moves to KV per workers/gateway/src/pack-baked-indexes.json).

• The King Wen hexagram number, the Chinese name, the pinyin romanization, and the six binary lines (bottom to top; a line is yang/solid or yin/broken) and their trigram composition are traditional, structural facts reproduced across every edition of the text — not any translator’s copyrighted expression.
• The English hexagram name, the judgment, the image, and all six line texts are original wording, written for this pack. James Legge’s 1899 translation (“The Yi King”, Sacred Books of the East vol. 16) is the public-domain reference used for the underlying meaning of each hexagram and line. This pack never reproduces Wilhelm/Baynes (“The I Ching or Book of Changes”, still under copyright) or any other modern commercial translation’s wording.
• Coin-toss probabilities (6/7/8/9 at 1/8, 3/8, 3/8, 1/8) and yarrow-stalk probabilities (1/16, 5/16, 7/16, 3/16) are the standard, well-documented results of each traditional counting method, not anyone’s expression.
• Meanings are traditional; the calling agent interprets them for its own question. Every tool description says this, so the result reads as structured material to reason over, not as advice delivered by the tool.

Randomness

Real randomness via the shared chance engine (@pipeworx/shared’s makeRng/rollWeighted), not a model pretending to cast coins. seed is optional on cast_i_ching and always returned, so the same seed and method reproduce the same cast exactly. No session/deck-draw state is used here — unlike the tarot or random-tables packs, a cast is a single self-contained roll of six independent lines each time, so there is nothing to carry across calls and this pack does not request KV injection.

Errors

A hexagram number outside 1-64, a name that matches nothing, or a search query with no matches are all loud errors naming the valid range or offering examples/keywords to try — never a silent empty result.

Tools

• cast_i_ching — Cast an I Ching hexagram using the traditional three-coin method (default) or the classical yarrow-stalk method, per James Legge’s 1899 translation.
• get_hexagram — Look up one of the 64 I Ching hexagrams (King Wen sequence) by its number (1-64) or by name (Chinese, pinyin, or the English gloss used in this pack).
• search_hexagrams — Search the 64 I Ching hexagrams (King Wen sequence) by a free-text query matched against name (Chinese, pinyin, English gloss) and keywords.