What is ticktick-mcp CLAUDE.md?

A project instruction file for Claude Code, an AI coding assistant, describing a TypeScript server that connects TickTick task management to MCP tools. MCP is a standard way for AI assistants to use external tools.

Use it as a reference when building, testing, or changing the TickTick MCP server, including running one test file or the full test suites.

It gives the coding assistant the project's commands, structure, and testing requirements, including the need for real credentials in integration tests.

How produckteavity/ticktick-mcp configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to produckteavity/ticktick-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/produckteavity/ticktick-mcp/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/produckteavity/ticktick-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/produckteavity/ticktick-mcp/claude-md/github.svg)](https://agentmods.dev/instructions/produckteavity/ticktick-mcp/claude-md)

Your own site

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

Per session 1,533 This file is loaded in full into every session.

When invoked 1,533 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	$0.01533	$0.01533
Opus 5	$0.00766	$0.00766
Sonnet 5	$0.00307	$0.00307
Haiku 4.5	$0.00153	$0.00153

Measured 9d ago against content hash 869b15644578, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

ticktick-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 9d 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 · 118 lines

How it starts

The opening of the file, as written. The whole thing — 118 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

A Model Context Protocol (MCP) server that exposes TickTick task management as MCP tools. Built with TypeScript, uses the TickTick Open API, and communicates over stdio transport.

Commands

npm run build          # TypeScript compilation (tsc) → dist/
npm run test           # Run all tests (vitest run)
npm run test:unit      # Unit tests only (tests/unit/)
npm run test:mcp       # MCP server integration tests (tests/mcp/)
npm run test:watch     # Vitest in watch mode

# Run a single test file
npx vitest run tests/unit/filtering.test.ts

# Integration tests require real credentials and prior auth
TICKTICK_CLIENT_ID=xxx npx vitest run tests/integration/spike-tags.test.ts

Architecture

Entry point: src/index.ts — Creates the MCP server, wires up dependencies (Keychain → TokenManager → TickTickClient), registers tools, connects stdio transport.

Layered design (each layer only depends on the one below):

Tool registration (src/tools/tasks.ts, src/tools/projects.ts) — Registers MCP tools on McpServer. Each tool validates input with Zod schemas, delegates to TickTickClient, and returns JSON-stringified success/error responses. Tool handlers catch all errors and return isError: true rather than throwing.
API client (src/ticktick-client.ts) — HTTP wrapper around TickTick Open API (api.ticktick.com/open/v1). Handles auth headers, 401 retry (one retry with token refresh), 429 rate limiting, and 10s timeout. Constructor accepts injectable fetch for testing.
Auth (src/auth.ts) — TokenManager manages OAuth token lifecycle. Reads tokens from keychain, checks expiry with 60s margin, refreshes automatically. Depends on a KeychainLike interface (not concrete Keychain).
Keychain (src/keychain.ts) — macOS-only credential storage via security CLI. Stores under service name ticktick-mcp.

Read the full file on GitHub · 118 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.

9d ago First seen · 118 lines · 1,533 tokens per session scan A 869b15644578

Subscribe to this mod's changes

ticktick-mcp CLAUDE.md is an instructions file published in the GitHub repository produckteavity/ticktick-mcp (1 stars, last pushed 6mo ago), licensed MIT. It adds 1,533 tokens to every session, about $0.0077 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.

LLM Project management ai claude mcp mcp-server model-context-protocol

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ticktick-mcp: Instructions file for Claude Code