google-calendar-mcp-server: Instructions file for Claude Code

CLAUDE.md

google-calendar-mcp-server CLAUDE.md is an instructions file for Claude Code from wanthigh/google-calendar-mcp-server. It costs 2,495 tokens per session, scanned A, original, MIT.

A project instruction document for developing a Google Calendar MCP server. It describes the server’s architecture, technologies, folder structure, calendar operations, validation, errors, and retries.

In plain words
What is it for?
Use it as a reference when building or changing the described TypeScript Google Calendar integration.
Why use it?
It gives an agent project-specific guidance that is otherwise easy to miss when working in an unfamiliar codebase. MCP is a standard way for an AI agent to connect to external tools such as Google Calendar.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md.

This is wanthigh/google-calendar-mcp-server's own configuration. It tells Claude Code how to work on google-calendar-mcp-server itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything google-calendar-mcp-server configures →

Reuse

Borrowing it

Nothing to install: this file belongs to wanthigh/google-calendar-mcp-server. 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/wanthigh/google-calendar-mcp-server/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/wanthigh/google-calendar-mcp-server

Made for: Claude Code.

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Per session 2,495 This file is loaded in full into every session.
When invoked 2,495 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.02495 $0.02495
Opus 5 $0.01247 $0.01247
Sonnet 5 $0.00499 $0.00499
Haiku 4.5 $0.00249 $0.00249

Measured 8d ago against content hash ac4fc2fac484, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

google-calendar-mcp-server 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 8d 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 · 315 lines

How it starts

The opening of the file, as written. The whole thing — 315 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Google Calendar MCP Server 开发指导

项目概述

这是一个基于 Model Context Protocol (MCP) 的 Google Calendar 集成服务,提供了完整的日历事件管理功能。项目使用 TypeScript 开发,通过 MCP SDK 与 Claude 集成,支持单一和批量操作,并具备企业级的错误处理和重试机制。

核心架构

技术栈

  • TypeScript: ES模块 (ESNext)
  • MCP SDK: @modelcontextprotocol/sdk v0.4.0+
  • Google APIs: googleapis v126.0.1+
  • 验证库: Zod v3.22.4+
  • 运行时: Node.js 18+

项目结构

google_chrome_calendar_server/
├── src/
│   ├── index.ts              # MCP Server 主入口
│   ├── services/
│   │   ├── auth.ts           # OAuth2 认证服务
│   │   ├── calendar.ts       # Google Calendar API 封装
│   │   └── config.ts         # 配置管理
│   ├── tools/
│   │   ├── create-event.ts   # 创建事件工具
│   │   ├── update-event.ts   # 更新事件工具
│   │   ├── delete-event.ts   # 删除事件工具
│   │   ├── list-events.ts    # 列表事件工具
│   │   ├── search-events.ts  # 搜索事件工具
│   │   ├── batch-create-events.ts  # 批量创建
│   │   ├── batch-update-events.ts  # 批量更新
│   │   └── batch-delete-events.ts  # 批量删除
│   ├── utils/
│   │   ├── validation.ts     # 输入验证
│   │   ├── error.ts          # 错误处理
│   │   └── retry.ts          # 重试机制
│   └── types/
│       └── calendar.ts       # 类型定义
├── config/
│   ├── config.json           # 应用配置
│   ├── credentials.json      # Google OAuth2 凭证
│   └── token.json           # OAuth2 令牌(自动生成)
└── dist/                     # 编译输出目录

关键实现细节

1. Google Calendar API 特性

更新事件的重要注意事项

Google Calendar API 在更新事件时要求提供完整的事件数据,而不是仅提供更改的字段。必须先获取现有事件,然后合并更新:

async updateEvent(input: UpdateEventInput): Promise<CalendarEvent> {
  // 先获取现有事件数据 - 这是关键步骤!
  const existingEvent = await this.calendar.events.get({
    calendarId: this.configManager.getDefaultCalendarId(),
    eventId: input.eventId,
  });

  // 保留所有现有数据,仅更新提供的字段
  const updateData = {
    summary: existingEvent.data.summary,
    start: existingEvent.data.start,
    end: existingEvent.data.end,
    // ... 其他必需字段
  };

  // 应用更新
  if (input.summary !== undefined) updateData.summary = input.summary;
  // ... 更多字段更新
}

Read the full file on GitHub · 315 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.

  1. 8d ago First seen · 315 lines · 2,495 tokens per session scan A ac4fc2fac484

Subscribe to this mod's changes

google-calendar-mcp-server CLAUDE.md is an instructions file published in the GitHub repository wanthigh/google-calendar-mcp-server (1 stars, last pushed 11mo ago), licensed MIT. It adds 2,495 tokens to every session, about $0.0125 per session on Opus 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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