What is time-mcp CLAUDE.md?

Repository instructions for a Cloudflare Workers server that gives AI assistants the current time in a named time zone. They also document how to run and deploy the server.

Working on, testing, configuring, or deploying this time-service project, including changing its default time zone.

It gives the coding agent the project context and the commands needed for local development and Cloudflare deployment.

time-mcp CLAUDE.md — Instructions file for coding agents by kiyo-e: Repository instructions for a Cloudflare Workers server that gives…

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods

npx agentmods add instructions/kiyo-e/time-mcp/claude-md

Clone the repo

git clone --depth 1 https://github.com/kiyo-e/time-mcp

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/kiyo-e/time-mcp/claude-md.svg)](https://agentmods.dev/instructions/kiyo-e/time-mcp/claude-md)

Your own site

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

Per session 580 This file is loaded in full into every session.

When invoked 580 The same file — it is already loaded in full.

Security scan A 0 findings. Scan, not verified.

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	$0.00580	$0.00580
Opus 5	$0.00290	$0.00290
Sonnet 5	$0.00116	$0.00116
Haiku 4.5	$0.00058	$0.00058

Measured 2d ago against content hash e1486af9e809, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

time-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 2d 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 · 67 lines

How it starts

The opening of the file, as written. The whole thing — 67 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 Cloudflare Workers-based MCP (Model Context Protocol) server that provides timezone-aware time information. The project uses the @modelcontextprotocol/sdk to implement an MCP server and the agents package to create HTTP handlers for Cloudflare Workers.

Development Commands

Run Development Server

npm run dev

Starts the Wrangler development server with hot-reload. The server will be available locally.

Deploy to Cloudflare

npm run deploy

Deploys the Worker to Cloudflare's edge network.

Deploy with Custom Timezone

wrangler deploy --var DEFAULT_TIMEZONE:America/New_York

Override the default timezone (defaults to Asia/Tokyo) during deployment.

Architecture

Core Components

src/index.ts - Main entry point containing:

MCP server initialization with @modelcontextprotocol/sdk
Single tool: get_time - returns current time in specified IANA timezone
Cloudflare Workers fetch handler that processes MCP requests via HTTP
Environment variable handling for timezone configuration

Key Technical Details

Timezone Handling: Uses Intl.DateTimeFormat to format times in any IANA timezone. The formatTime() function:

Formats date/time components using the specified timezone
Calculates UTC offset by comparing UTC and zoned timestamps
Returns ISO 8601-like format: YYYY-MM-DDTHH:MM:SS±HH:MM

Environment Variables:

DEFAULT_TIMEZONE is configured in wrangler.toml and accessed via Cloudflare Workers env object
Stored in module-scoped currentEnv variable to be accessible in MCP tool handlers

MCP Integration:

Uses createMcpHandler from agents/mcp to bridge MCP server and Cloudflare Workers
CORS is enabled with allowOrigin: '*' for broad client access
Tool schema validation uses Zod

Configuration Files

wrangler.toml: Cloudflare Workers configuration including compatibility settings and environment variables
tsconfig.json: TypeScript config targeting ES2021 with WebWorker libraries for Cloudflare Workers environment
package.json: Dependencies include MCP SDK, agents framework for Workers integration, and Zod for validation

Read the full file on GitHub · 67 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.

2d ago First seen · 67 lines · 580 tokens per session scan A e1486af9e809

Subscribe to this mod's changes

time-mcp CLAUDE.md is an instructions file published in the GitHub repository kiyo-e/time-mcp (0 stars, last pushed 6mo ago), licensed MIT. It adds 580 tokens to every session, about $0.0029 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 2026-09-01.

vscode buildNext.instructions.md

Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).

microsoft/vscode · 6,785 tokens

time-mcp CLAUDE.md