What is fatebook-mcp CLAUDE.md?

Development instructions for a Python MCP server that connects AI tools to Fatebook, a service for recording and reviewing personal or public questions. They explain the setup, project files, dependencies, and available API requests.

Use them when setting up the Python environment with uv, running the server, changing Fatebook API integration, or working with question searches and filters.

They show agents how to install and run the server and how its requests map to the Fatebook service instead of requiring them to infer the project structure.

How an1lam/fatebook-mcp configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to an1lam/fatebook-mcp. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/an1lam/fatebook-mcp/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/an1lam/fatebook-mcp

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/an1lam/fatebook-mcp/claude-md/github.svg)](https://agentmods.dev/instructions/an1lam/fatebook-mcp/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/an1lam/fatebook-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/an1lam/fatebook-mcp/claude-md/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/an1lam/fatebook-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/an1lam/fatebook-mcp/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 716 This file is loaded in full into every session.

When invoked 716 The same file — it is already loaded in full.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00716	$0.00716
Opus 5.5	$0.00286	$0.00286
Sonnet 5.5	$0.00143	$0.00143
Haiku 4.5	$0.00072	$0.00072

Measured 2mo ago against content hash 020004c919aa, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

fatebook-mcp CLAUDE.md scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

CLAUDE.md · 94 lines

How it starts

The opening of the file, as written. The whole thing — 94 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

Project Overview

This is a Fatebook MCP (Model Context Protocol) server implementation in Python. The project uses MCP to provide integration with Fatebook.

Development Setup

This project uses uv for Python dependency management. Ensure Python 3.13+ is available.

Key Commands

# Install dependencies
uv sync

# Run the main script
uv run python main.py

# Add a new dependency
uv add <package-name>

# Add a development dependency
uv add --dev <package-name>

Project Structure

main.py - Entry point for the MCP server
pyproject.toml - Python project configuration and dependencies
uv.lock - Locked dependency versions

Dependencies

httpx - HTTP client library for making API requests
mcp[cli] - Model Context Protocol implementation with CLI support

Fatebook API Integration

Base URL: https://fatebook.io/api/v0/

API Endpoints

Get Questions: GET /getQuestions
- Required: apiKey
- Optional: resolved, unresolved, searchString, limit, cursor
- Fetch personal or public questions with filtering
Create Question: POST /createQuestion
- Required: apiKey, title, resolveBy, forecast (0-1)
- Optional: tags, sharePublicly, shareWithLists, shareWithEmail, hideForecastsUntil
Get Question: GET /getQuestion
- Required: apiKey, questionId
Resolve Question: POST /resolveQuestion
- Required: questionId, resolution (YES/NO/AMBIGUOUS), questionType, apiKey
- Supports binary and multi-choice questions
Add Forecast: POST /addForecast
- Required: questionId, forecast (0-1), apiKey
- Optional: optionId for multi-choice questions
Add Comment: POST /addComment
- Required: questionId, comment, apiKey
Edit Question: PATCH /editQuestion
- Optional updates: title, resolveBy, notes

Read the full file on GitHub · 94 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

2mo ago First seen · 94 lines · 716 tokens per session scan A 020004c919aa

Subscribe to this mod's changes

fatebook-mcp CLAUDE.md is an instructions file published in the GitHub repository an1lam/fatebook-mcp (7 stars, last pushed 10mo ago), licensed MIT. It adds 716 tokens to every session, about $0.0029 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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fatebook-mcp: Instructions file for Claude Code