mcptoon

mcptoon is a plugin for Claude Code from activeing123/mcptoon. Its manifest loads nothing; the 1 skill, 1 command, 1 hook, 1 MCP server it bundles cost 111 tokens per session together, scanned A, original, Apache-2.0.

A Claude Code plug-in that compresses the descriptions of tools supplied by MCP servers. MCP is a standard way for an AI assistant to connect to external tools and services.

In plain words
What is it for?
Use it when a Claude Code session has many MCP servers or tools and tool-list size is affecting token use. It installs the mcptoon command-line bridge and connects it to the session.
Why use it?
Large tool descriptions consume the assistant's context space before it does any work. This plug-in reduces that discovery information while keeping the tools available through a bridge.

Plugin for Claude Code

Written for Claude Code: a Claude Code plugin manifest. Also seen: mentions Claude Code.

Good fit Use it when a Claude Code session has many MCP servers or tools and tool-list size is affecting token use. It installs the mcptoon command-line bridge and connects it to the session.

Compare 6 plugins from other repositories ↓
Install in Claude Code
/plugin marketplace add activeing123/mcptoon/plugin install mcptoon
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.

Clone the repo
git clone --depth 1 https://github.com/activeing123/mcptoon

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.

agentmods badge for mcptoon

README.md
[![agentmods](https://agentmods.dev/badge/plugins/activeing123/mcptoon/claude-code-plugin/github.svg)](https://agentmods.dev/plugins/activeing123/mcptoon/claude-code-plugin)
Your own site
<a href="https://agentmods.dev/plugins/activeing123/mcptoon/claude-code-plugin"><img src="https://agentmods.dev/badge/plugins/activeing123/mcptoon/claude-code-plugin/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.

agentmods 80×15 button for mcptoon

Your own site · 80×15
<a href="https://agentmods.dev/plugins/activeing123/mcptoon/claude-code-plugin"><img src="https://agentmods.dev/badge/plugins/activeing123/mcptoon/claude-code-plugin.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session not measured What this adds to a session before it is invoked.
When invoked not measured The manifest loads nothing itself; its 1 skill, 1 command, 1 hook, 1 MCP server cost 111 tokens a session between them.
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.
Security

Grade A, and why

mcptoon 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 today.

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-code-plugin/.claude-plugin/plugin.json · 9 lines

What it actually says

{
  "name": "mcptoon",
  "description": "MCP tool-catalog compression for Claude Code. Compresses the tool discovery payload from 71,929 to 581 tokens (-99.2%). Auto-installs the zero-dependency mcptoon CLI (/mcptoon-setup), wires the serve bridge, and teaches the agent when to compress. MCP 2026-07-28 stateless-first bridge included.",
  "author": {
    "name": "activeing123"
  },
  "homepage": "https://github.com/activeing123/mcptoon"
}
Contents

What it installs

The manifest is a name and a version. 1 skill, 1 command, 1 hook, 1 MCP server travel with it, and installing the plugin installs all of them — 111 tokens a session between them. Each is measured on its own page, and each can be installed alone.

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. today First seen · 9 lines scan A 5b515189bc8d

Subscribe to this mod's changes

mcptoon is a plugin published in the GitHub repository activeing123/mcptoon (195 stars, last pushed today), licensed Apache-2.0. Its token cost is not measured: this kind of file is read by the harness, not the model. 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 2026-09-08.