caveman-shrink

MCP server · npm · ★ 116k · graded 2026-10-24Source linked

MCP proxy that compresses prose fields (tool descriptions, etc.) using caveman rules. Same accuracy, fewer context tokens.

No outside reports on file

caveman-shrink fetches arbitrary web URLs; restrict its folder reach, network access, and credentials before installing.

Based on public adoption and transparency signals as of Oct 24, 2026. Our opinion, not a code audit or security guarantee.

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What it can access

Local filesNo local folder access notedLOW
Command executionNo shell command runner notedLOW
Network reachFetches arbitrary web URLsREVIEW
CredentialsNo API token requiredLOW
Package sourcenpm (caveman-shrink)PUBLIC

Inferred from this listing’s public package details and description. Check the project’s source before installing.

Install

npx -y caveman-shrink

All setup options ↓

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Everything known

We found nothing about this project in the sources we read (last checked 2026-10-30). That does not mean it has no problems.

0 incidents · 0 advisories · 0 news articles · 0 community threads · checked 2026-10-30

Popularity grade: A (from public signals such as stars and downloads, not a code review). Graded 2026-10-24.

Sources we read: OSV, GitHub Advisory Database, CISA Known Exploited Vulnerabilities, 44 security news feeds and our incident library. Last checked 2026-10-30.

Check a specific version →

About Caveman Shrink

Caveman Shrink is an MCP server focused on Memory & knowledge: MCP proxy that compresses prose fields (tool descriptions, etc.) using caveman rules. Same accuracy, fewer context tokens.

It is published on npm as caveman-shrink and hosted on GitHub at juliusbrussee/caveman (114,950 GitHub stars, 1,525 weekly npm downloads). Based on its public metadata, its operational scope includes: fetches arbitrary web urls.

Setup

Check these steps against the project’s own instructions before running anything.

Run caveman-shrink with --ignore-scripts in claude_desktop_config.json or .cursor/mcp.json:

json

{
  "mcpServers": {
    "caveman-shrink": {
      "command": "npx",
      "args": ["-y", "--ignore-scripts", "caveman-shrink"]
    }
  }
}

Why this grade

AA — Few risk signals

Signal-based grade (6/7 points): very widely starred on GitHub, listed in several sources, public source code. This reflects adoption and transparency, not a code review.

Popularity and upkeep

80/100

GitHub stars: 116k
Weekly npm downloads: 3.6k
Listing last refreshed: 2026-10-30

These are public popularity signals, not a maintenance check. Look at the repository’s commit history and open issues.

Risks to watch for

Untrusted web content & prompt injection: Fetches arbitrary web pages or remote endpoints where hidden instructions could manipulate agent behavior. Restrict outbound domains and review tool outputs.
Dependency & version pinning: Distributed via npm (caveman-shrink). Pin an exact release version or commit SHA rather than floating tags so upstream updates are reviewed first.

How to lower the risk

Least-privilege permissions

Give it access only to the specific folders, accounts or projects it needs, never your whole drive or admin account.
Use a separate, limited API key or login just for this tool so you can switch it off without affecting anything else.

Network isolation

Run it on a work computer or sandbox account, not one holding personal or company-sensitive data.
If your IT team can, limit which websites and services it is allowed to contact.

Monitoring

Check its activity history or logs weekly at first, and look at what it changed or sent.
Turn on alerts for new logins or unusual usage on any account it connects to.

Red flags to watch for

It asks for more access than its job requires, or prompts you to paste passwords.
It suddenly updates with new owners, or starts contacting unfamiliar websites.

Questions

How do I install Caveman Shrink?

Run npx -y caveman-shrink in your terminal, or add the server entry to your claude_desktop_config.json or .cursor/mcp.json as shown in the Setup section on this page. Full setup docs and environment variables are in github.com/juliusbrussee/caveman.

Are there security reports about Caveman Shrink?

No reports found for this package in our research (last checked 2026-10-30). Caveman Shrink currently holds Grade A (Few risk signals) based on public adoption and transparency signals. Key risk areas to watch include untrusted web content & prompt injection:, dependency & version pinning:.

Is Caveman Shrink actively maintained?

Caveman Shrink has 116k GitHub stars and 3.6k weekly npm downloads. Our directory data was last refreshed on 2026-10-30. Check recent commit activity, release tags, and open issues at github.com/juliusbrussee/caveman before pinning it in production.

What are alternatives to Caveman Shrink?

Compare Caveman Shrink side by side with similar MCP servers in the Related tools section on this page, or browse all MCP servers on AgentArmorHQ.

Maintain or use Caveman Shrink? Show its live grade in your GitHub README, docs site, or run a check from the terminal before you install.

AgentArmorHQ Risk Grade A for Caveman Shrink

GitHub README Markdown:

markdown

[![AgentArmorHQ Risk Grade for Caveman Shrink](https://agentarmorhq.com/api/badge/juliusbrussee-caveman)](https://agentarmorhq.com/skills/juliusbrussee-caveman)

HTML embed:

html

<a href="https://agentarmorhq.com/skills/juliusbrussee-caveman"><img src="https://agentarmorhq.com/api/badge/juliusbrussee-caveman" alt="AgentArmorHQ Risk Grade for Caveman Shrink" height="20" /></a>

Terminal check:

terminal

curl -fsSL https://agentarmorhq.com/api/cli | node --input-type=module - check "juliusbrussee-caveman"

Share with your security lead

Need sign-off to use caveman-shrink? Copy this note for Slack, a ticket or a pull request.

### AgentArmorHQ Security Review Memo: caveman-shrink
- **Listing URL:** https://agentarmorhq.com/skills/juliusbrussee-caveman
- **Type:** App connector
- **Risk Grade:** Grade A (Few risk signals)
- **Outside Security Advisories on File:** 0
- **Public Adoption:** 116k GitHub stars, 3.6k weekly npm downloads

#### Permission & Blast-Radius Signals
- **Local files:** No local folder access noted
- **Command execution:** No shell command runner noted
- **Network reach:** Fetches arbitrary web URLs
- **Credentials:** No API token required
- **Package source:** npm (caveman-shrink)

#### Recommended Hardened Setup
- **Command:** `npx -y --ignore-scripts caveman-shrink`
- **Controls:** Pin an exact version in `.mcp.json`, scope access to a single workspace folder, and use a least-privilege read-only token where supported.

_Based on public adoption and transparency signals as of Oct 24, 2026. Our opinion, not a code audit or security guarantee._

Key facts

Type: App connector
Publisher: juliusbrussee
Source code: github.com/juliusbrussee/caveman
Install command: npm install caveman-shrink
Est. context load: ~550 tokens / turn (~3 tool schemas, 0.27% of 200k context)
Popularity: 116k GitHub stars, 3.6k weekly npm downloads
Last updated: 2026-10-30
Last graded: 2026-10-24

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