Bibliomantic MCP Server

> Tired of watching your LLM queries wander down the wrong path because of random hallucinations?

>

> Why leave the randomness entirely to the model?

bibliomantic-mcp-server gives an LLM a different source of uncertainty: randomly selected context drawn from the *I Ching*.

The inspiration comes from Philip K. Dick's science-fiction novel *The Man in the High Castle*. Throughout the novel, characters consult the *I Ching* when making decisions. Its influence extends beyond the characters themselves: the oracle affects the direction of the story, the fictional book within the story, and—famously—the process Philip K. Dick used while writing the novel.

This MCP server applies that idea to an LLM.

Rather than asking the model to simply invent another direction when reasoning or writing reaches an uncertain point, the user can explicitly invoke the server to introduce an *I Ching* consultation into the model's context. The resulting hexagram becomes an external, stochastic influence that the LLM can interpret and incorporate into whatever it is doing.

In other words:

If your LLM is going to hallucinate anyway, you might as well give its hallucinations some ancient Chinese wisdom to work with.

The server operates only when invoked by the end user or an MCP client acting on the user's request. It is not intended to autonomously interfere with ordinary model responses.

And, importantly, this project does not claim that the *I Ching* predicts the future or provides reliable real-world advice. It is an experimental, literary, philosophical, and creative-writing tool—particularly suitable for anyone curious about what happens when an AI system is allowed to wander through the same sort of bibliomantic machinery that helped shape a Philip K. Dick novel.

What Is This?

bibliomantic-mcp-server is a Model Context Protocol server that allows an MCP-compatible AI application to consult the *I Ching*.

It provides:

• Traditional 64-hexagram *I Ching* data
• Three-coin divination simulation
• Randomized bibliomantic context for LLM reasoning and writing
• Individual hexagram lookup
• MCP resources containing hexagram data
• Structured consultation tools designed for AI use

The interesting part is not merely generating a hexagram.

The interesting part is putting that hexagram inside an LLM's context and seeing what the model does with it.

The Idea

Large language models are probabilistic systems. When confronted with ambiguity, incomplete information, creative choices, or multiple plausible reasoning paths, they must choose among possibilities.

Normally, those choices emerge entirely from the model itself.

Bibliomantic MCP introduces an additional influence.

User question
     │
     ▼
    LLM
     │
     │ user requests bibliomantic consultation
     ▼
bibliomantic-mcp-server
     │
     ▼
three-coin I Ching simulation
     │
     ▼
hexagram + interpretation
     │
     ▼
added to LLM context
     │
     ▼
LLM continues with a new influence

The oracle does not replace the model's reasoning.

It perturbs it.

That makes the server potentially interesting for:

• creative writing
• speculative reasoning
• brainstorming
• narrative generation
• alternative perspectives
• experiments involving stochastic AI behavior
• literary experiments inspired by Philip K. Dick

Philip K. Dick and *The Man in the High Castle*

The central inspiration for this project is Philip K. Dick's *The Man in the High Castle*.

The *I Ching* occupies an unusual position in the novel. Characters repeatedly consult it when deciding what to do, allowing apparently random divinations to alter their actions and therefore the course of the story.

The idea becomes recursive.

The novel contains a fictional novel, *The Grasshopper Lies Heavy*, whose existence influences the characters living inside Dick's alternate history. Meanwhile, Dick himself used the *I Ching* while writing *The Man in the High Castle*.

The result is an unusual feedback loop between:

• author
• oracle
• story
• characters
• story-within-the-story

bibliomantic-mcp-server explores what happens when an LLM is inserted into that loop.

Instead of:

Author → I Ching → Story

we can now experiment with:

Human → LLM → I Ching → LLM → Story

A Note About "Hallucinations"

The term *hallucination* is used somewhat playfully here.

This server does not technically prevent LLM hallucinations, improve factual accuracy, or make unreliable model output trustworthy.

In fact, its purpose is almost the opposite.

Bibliomantic MCP deliberately introduces an external, randomly selected conceptual influence when the user asks for one.

For factual questions, this may be completely inappropriate.

For fiction, brainstorming, speculative thinking, and experiments in AI creativity, however, deliberately steering the model toward an unexpected conceptual path can be the entire point.

Available Tools

`i_ching_divination`

Performs an *I Ching* divination using a simulated traditional three-coin method and returns the resulting hexagram and interpretation.

`bibliomantic_consultation`

Performs a complete bibliomantic consultation intended to provide additional context for an LLM responding to a particular question or creative problem.

`get_hexagram_details`

Retrieves information about a particular *I Ching* hexagram by number.

1–64

`server_statistics`

Returns information about the server and its available capabilities.

Resources

`hexagram://{number}`

Loads a particular hexagram as an MCP resource.

For example:

hexagram://1

`iching://database`

Provides access to the complete 64-hexagram database.

Prompt Templates

The server includes structured prompt templates for several forms of consultation:

• `career_guidance_prompt`
• `creative_guidance_prompt`
• `general_guidance_prompt`

These templates provide examples of how an MCP client can incorporate bibliomantic context into a larger conversation.

They should not be interpreted as endorsements of the *I Ching* as a source of professional or real-world advice.

Installation

Requirements

• Python 3.10+
• An MCP-compatible host

Clone the repository:

git clone https://github.com/d4nshields/bibliomantic-mcp-server.git
cd bibliomantic-mcp-server
pip install -e .

An MCP configuration can then launch the server with Python:

{
  "mcpServers": {
    "bibliomantic": {
      "command": "python",
      "args": ["-m", "bibliomantic_server"]
    }
  }
}

Example Usage

Creative writing

Ask your MCP-enabled AI:

> I'm stuck on what should happen next in this story. Consult the I Ching and use the result as an influence on the next scene.

Breaking a reasoning deadlock

> There are several plausible ways to approach this fictional problem. Perform a bibliomantic consultation and use the result to choose an unexpected direction to explore.

Philip K. Dick-style experiment

> Consult the I Ching using the bibliomantic server. Treat the result as an external influence on the direction of this science-fiction story.

Basic divination

> Perform an I Ching divination and explain the resulting hexagram.

Specific hexagram

> Tell me about I Ching hexagram 42.

How the Divination Works

The server simulates the traditional three-coin method.

Coin tosses generate the six lines forming an *I Ching* hexagram. The resulting pattern identifies one of the 64 hexagrams available to the model.

Randomness is generated using Python's `secrets` module.

The important distinction is that the random result is generated outside the LLM.

That means the model does not get to quietly choose the supposedly "random" piece of wisdom that happens to fit the answer it was already constructing.

The MCP server chooses first.

The LLM has to deal with what it gets.

That constraint is a significant part of the experiment.

Why External Randomness?

An LLM asked to "pick something random" is still generating tokens according to its learned probability distribution.

Bibliomantic MCP instead introduces a result produced outside the model.

This creates a simple form of stochastic context injection:

LLM state
   +
externally generated random event
   +
structured I Ching interpretation
   =
new model context

The result can push a conversation toward concepts or associations that might otherwise have had very low probability of appearing.

For creative applications, that can be useful.

Or at least interesting.

User Control

Bibliomantic consultation is intended to be explicitly invoked.

The server does not need to participate in every query and should not silently inject divinations into unrelated conversations.

A user might work normally with an LLM for an extended period and invoke the oracle only when they want:

• an unexpected direction
• a narrative disruption
• an alternative interpretation
• a creative constraint
• a deliberate random influence

This keeps the oracle in approximately the role it occupies in *The Man in the High Castle*: something consulted when a character—or in this case, a user—decides to consult it.

Intended Uses

Good uses include:

• Science-fiction writing
• Philip K. Dick-inspired literary experiments
• Plot generation
• Character decisions
• World-building
• Creative brainstorming
• Perspective shifting
• Generative-art experiments
• Studying human/AI interaction with random external context
• Demonstrating MCP tools and resources

Not Intended For

Do not treat output from this server as authoritative guidance for:

• medical decisions
• legal decisions
• financial decisions
• personal safety
• mental-health treatment
• major life decisions
• predictions of future events

The server does not establish that divination works, that an oracle possesses knowledge, or that randomly selected philosophical text provides factual evidence.

This is an experimental creative tool, not an oracle you should bet your life on.

If Philip K. Dick-style weirdness emerges from your LLM session, however, the software is probably working as intended.

Technical Implementation

The project uses:

• Python
• FastMCP
• Model Context Protocol
• A complete 64-hexagram data set
• Python's `secrets` module for external randomness
• Type hints and generated schemas
• MCP tools, resources, and prompts

The server requires no external API to perform a consultation.

Development

Run locally

python bibliomantic_server.py

MCP Inspector

mcp dev bibliomantic_server.py

Security and Privacy

The server is deliberately simple.

• No persistent user tracking
• No requirement to transmit consultations to an external divination service
• No external API dependency for generating random results
• Input validation for server parameters
• Randomness generated locally
• Consultation occurs only when invoked

As with any MCP server, users should review the source code and understand the permissions granted to an MCP server before enabling it in an AI host.

Contributing

Contributions are welcome.

When contributing:

1. Follow the existing code style.

2. Preserve compatibility with MCP clients.

3. Add or update tests when changing behavior.

4. Update documentation when adding tools or resources.

5. Preserve the distinction between creative bibliomancy and factual or professional advice.

6. Keep the weird part weird.

License

MIT License. See LICENSE for details.

Acknowledgments

This project owes its existence to an unusual chain of ideas:

• the ancient Chinese *I Ching*
• centuries of bibliomantic practice
• Philip K. Dick
• *The Man in the High Castle*
• modern large language models
• Model Context Protocol
• and the questionable but irresistible idea that an AI's random wanderings might benefit from consulting a 3,000-year-old book first.

**The model was going to take *some* path.**

Now the oracle gets a vote.