mcptoon
by activeing123
One zero-dependency CLI for every MCP server and agent skill. Token optimization, tool discovery and context compression: 71,929 -> 581 tokens (-99.2%, measured), schemas stay out of context. One config for Claude Code, Codex, Cursor, every agent. 341KB, pure Python. | 零依赖 CLI：管所有 MCP 工具与技能，工具发现省 99.2% token。
404stars
23forks
Python
Added 8/11/2026
From $49 · 30 days · terms & refunds
⚠️ Third-Party Software Notice
This skill is third-party open-source software developed and hosted independently on GitHub. SkillsLLM is an informational directory and does not control or maintain the underlying repository.
Any security checks, ratings, or warnings displayed by SkillsLLM are automated and limited in scope. They do not constitute a security certification or guarantee that the software is safe, error-free, or free from malicious code, vulnerabilities, compromised dependencies, or prompt-injection risks.
Review the source code, permissions, dependencies, and configuration before installing or running any third-party skill. Use is at your own risk. To the maximum extent permitted by applicable law, SkillsLLM is not liable for losses arising from third-party software.
AI Agentsagent-skillsclaudeclaude-codeclicodexcontext-compressioncursorllmmcpmcp-climcp-clientmcp-servermcp-toolsmodel-context-protocolpythonskill-managementtoken-optimizationwindowswindsurfzero-dependencies
Maintainer of this skill?
Automated security scan — not a certification.
Installation
# Add to your Claude Code skills
git clone https://github.com/activeing123/mcptoonGetting Started
Guides for using ai agents skills like mcptoon.
- Caveman: Cut Claude Token Use by 65%How agent-side prompt compression works, when to use it, and when not to.
- How to Test an AI Skill: A Practical Guide to EvalsEvaluate skills with realistic fixtures, a baseline, and repeatable checks.
- Getting Started with AI SkillsFirst-time install walkthrough for Claude Code, Codex CLI, and ChatGPT.
Security ReportVerified
Last scanned: 8/12/2026
{
"issues": [],
"status": "PASSED",
"scannedAt": "2026-08-12T05:37:21.978Z",
"npmAuditRan": true,
"pipAuditRan": true,
"promptInjectionRan": true
}Compare with similar skills
See how mcptoon compares with popular alternatives.
https://github.com/user-attachments/assets/0272d3a8-c74f-428d-8559-fbf804ce0685
🚀 Quick Start (Choose Your Way)
When installed, mcptoon automatically injects its own official skill (/mcptoon) into your agents. You never need to memorize terminal commands — just ask directly in Cursor, Claude Code, Windsurf, or DSH:
# Ask the built-in skill anytime:
"Load /mcptoon skill and check what MCP tools I currently have."
"Help me find an MCP tool that converts HTML to PDF and call it."
"The tool output was truncated, retrieve the full original copy."
"How many tokens did mcptoon save for me today?"
"Doctor self-check: are all my MCP servers connected properly?"
Your agent loads /mcptoon and drives everything behind the scenes!
# 1. Install (zero dependencies, 534KB)
pip install mcptoon
# 2. One command: detect MCP servers & auto-configure agents
# (Also self-installs `/mcptoon` skill into all detected agents)
mcptoon quickstart
# 3. View compact tool catalog (-99.2% tokens)
mcptoon manifest
# 4. Route tasks to skills or doc chapters (<5ms)
mcptoon skills resolve "write git commit message"
mcptoon docs resolve "how does release gating work"
Is it actually saving you anything? After a fresh install mcptoon can sit in
direct mode — installed but not wired into the agent — and save nothing. See
Which mode is cheapest?, or just run mcptoon mode.
⚡ Core Capabilities at a Glance
| 💥 Save context (why ①) | 🧩 One config, every agent (why ②) |
|---|---|
• ✅ Compact name index (−99.2%): 255 tools → 581 tokens, full schema fetched on demand• ✅ Lossless result compression: reversible, retrieve the original behind any handle• ✅ Session dedup: byte-identical output in one turn becomes a reference• ✅ Skills the same way: one 39-token pointer + one lookup replaces every SKILL.md• ✅ Docs too: docs feeds 1 chapter, not 19 — 40k → 17k tokens per question• ✅ Honest numbers: real tiktoken accounting via mcptoon bench |
• ✅ Native CLI: any shell-capable agent runs mcptoon and gets every feature — no MCP server, no config• ✅ GUI clients too: sync writes the JSON for Claude, Cursor, Cline, Windsurf, VS Code, Claude Code — 6 here, 103+ supported• ✅ |
Frequently Asked Questions
What is mcptoon?
mcptoon is an open-source ai agents skill for AI coding assistants such as Claude Code, Codex CLI, and ChatGPT, built by activeing123. One zero-dependency CLI for every MCP server and agent skill. Token optimization, tool discovery and context compression: 71,929 -> 581 tokens (-99.2%, measured), schemas stay out of context. One config for Claude Code, Codex, Cursor, every agent. 341KB, pure Python. | 零依赖 CLI：管所有 MCP 工具与技能，工具发现省 99.2% token。. It has 404 GitHub stars.
Is mcptoon safe to use?
Yes. mcptoon passed SkillsLLM's automated security scan — a dependency vulnerability audit plus prompt-injection heuristics — with no high-severity issues. You can read the full report in the Security Report section on this page.
How do I install mcptoon?
Clone the repository with "git clone https://github.com/activeing123/mcptoon" and add it to your Claude Code skills directory (see the Installation section above).
What programming language is mcptoon written in?
mcptoon is primarily written in Python. It is open-source under activeing123 on GitHub, so you can review or fork the full source.
Are there alternatives to mcptoon?
Yes. SkillsLLM lists many other AI Agents skills you can browse and compare side by side. Open the AI Agents category from the badge at the top of this page, or use the Related Skills and comparison links further down to weigh mcptoon against similar tools.
Comments (0)
to leave a comment.
No comments yet. Be the first to share your thoughts!
Related Skills
Reverse engineer anything with agents, from app behavior down to native binaries.
445,259
109,916
TypeScript
AI Agentsagent-skillsai
The agent harness performance optimization system. Skills, instincts, memory, security, and research-first development for Claude Code, Codex, Opencode, Cursor and beyond.
299,887
44,298
JavaScript
AI Agentsai-agentsanthropic
Skills for Real Engineers. Straight from my .agents directory.
250,518
21,171
Shell
AI Agents
An agentic skills framework & software development methodology that works.
234,966
20,863
Shell
AI Agentsaibrainstorming