Ellmos Clatcher MCP

Name: Ellmos Clatcher MCP
Author: ellmos-ai

by ellmos-aiversion 1.0.17i★ 1iRuns on your computer

Registry nameio.github.ellmos-ai/ellmos-clatcher-mcp

Install

Overview

Description from the maker (original English)

Utility MCP server: JSON repair, encoding fixes, conversion, duplicates, batch rename, archives.

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi2 of 2 passedChecked from public information; code not scanned yet
UsageiVery new↓ 125/wk · ★ 1

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs on your computer
Transport: stdio
Category: Developer tools

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 2 of 2 passed
Runs on your computer with your user’s permissions (files, network, apps).
The registry lists no key to fill in.

You need

npmNode.js installed (for the npx command)

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json

{
  "mcpServers": {
    "ellmos-clatcher": {
      "command": "npx",
      "args": [
        "-y",
        "ellmos-clatcher-mcp"
      ]
    }
  }
}

Run this in your terminal

claude mcp add ellmos-clatcher -- npx -y ellmos-clatcher-mcp

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "ellmos-clatcher": {
      "command": "npx",
      "args": [
        "-y",
        "ellmos-clatcher-mcp"
      ]
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "ellmos-clatcher": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "ellmos-clatcher-mcp"
      ]
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

This one runs on your computer, and ChatGPT can only connect to servers on the internet. Pick another app.

Your choice stays on this device in a cookie; no account needed.

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

Which apps can use it

Based on how this server connects and on each app’s own docs, checked Nov 10, 2026.

Run on your computer in

Claude Goose LM Studio Msty Studio Cherry Studio Cursor VS Code + GitHub Copilot Visual Studio Windsurf (Devin Desktop)Zed Kiro Cline Continue JetBrains AI Assistant Claude Code Codex CLI Gemini CLI OpenCode nodecode Warp LibreChat Raycast

All apps, with pros and cons →

What it can do

Runs on your computer; the tool list appears in your AI app after you install it.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 10, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account ellmos-ai, which owns the repo
✓ Pass
Still maintained
Code last changed 2 days ago
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
– Not applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
– Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
… Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints

Compared with others in Developer toolsi

More stars than 65% of the other 5729 servers in this category
Published to the registry more recently than 62% of the other 5729 servers in this category
Basic checks equal to or better than 100% of the other 5729 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is Ellmos Clatcher MCP safe?

It passed 2 of 2 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

The registry does not list a required key, though some servers ask you to sign in on first use.

Does it run on my computer or in the cloud?

It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).

Is it still maintained?

The GitHub repo last changed 2 days ago, and the latest version (1.0.17) reached the registry 16 days ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Node.js on your computer.

What can I use instead?

In the same category: REA, Netdata, Front-End Checklist

Alternatives

Servers in the same category from other makers, sorted by stars.

Reading a card:↓ Downloads per weeki★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

REA

Reverse engineer anything from your terminal or agent with one CLI and MCP server.

by morlutoWidely used↓ 388.7K/wk★ 448.2KUpdated 16 days ago

Runs on your computer

Install

Netdata

Real-time infrastructure monitoring with metrics, logs, alerts, and ML-based anomaly detection.

by netdataWidely used★ 81.3KUpdated 6 days ago

Runs in the cloud

Install

Front-End Checklist

Review frontend code and live pages against 386 quality-gated web development rules.

by thedaviddiasWidely used★ 74.7KUpdated 37 days ago

Runs in the cloud

Install

README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

ellmos-clatcher-mcp

Claude Patcher -- an MCP server that extends AI coding agents with utility tools they don't have natively. File repair, format conversion, duplicate detection, batch operations, and more.

Use Clatcher when your agent needs reliable local maintenance tools for text files, data files, and project folders: repair invalid JSON, normalize encodings, convert formats, compare folders, rename files safely, and verify checksums without leaving the MCP workflow.

[!NOTE]

AI / LLM Integration Note: All destructive operations (e.g. batch_rename, cleanup_file, fix_json, fix_encoding, fix_umlauts) default to dry-run mode (dry_run: true). Autonomous agents must explicitly specify dry_run: false to execute mutations on disk.

Highlights & Value Proposition

12 Specialized Agent Tools: Extends Claude Code, Cursor, and MCP agents with utilities they lack out-of-the-box (JSON repair, encoding normalization, format conversion, diffing, deduplication, regex batch renaming).
Default Dry-Run Guard: Mutating tools run in preview mode (dry_run: true) by default. Agents must pass dry_run: false to write to disk.
100% Local-First & Zero-Egress: Pure local execution over stdio JSON-RPC. No network calls, no cloud telemetry, zero remote attack surface.
Atomic File Operations: All disk modifications write to temporary staging buffers before replacement, preventing corrupt or truncated files.
Lossless Encoding Preservation: Eliminates Windows cp1252 artifacts, BOM headers, and German umlaut Mojibake (ä, ö, ü, ß) while guaranteeing pristine UTF-8 bytes.
Universal Multi-OS Parity: Tested continuously across Ubuntu, Windows, and macOS with native path handling and line endings.

🧭 Quick Navigation

#	Section	Focus
01	✨ Highlights & Value Proposition	12 essential tools AI agents lack natively: repair, convert, deduplicate, diff, batch
02	🎯 Target Personas & Discoverability	Autonomous agents, full-stack developers, release engineers, and security compliance
03	⚖️ Comparative Matrix & Alternatives	10-dimension evaluation vs standard agent shells, ad-hoc jq/sed, desktop apps, cloud APIs
04	📐 System Architecture & Data Flow	5-tier architecture flowchart TD for stdio transport and repair engines
05	🔄 End-to-End Execution Sequence	14-step dry-run safety sequence diagram from user prompt to verified disk write
06	🛡️ Core Invariants & Safety Guarantees	10 architectural guarantees ensuring default dry-run, zero-egress, and atomic writes
07	🛠️ Tool Surface & Capabilities	Deep-dive into all 12 MCP tools with parameter schemas and default preview modes
08	⚙️ Installation & Client Setup	Seamless setup for Claude Code CLI, Claude Desktop, Cursor, and npm global
09	💡 Practical Usage Workflows	Step-by-step agent repair recipes: JSON fix, encoding normalization, batch rename
10	🛡️ Dry-Run Protocol & Safety Verification	Preview-first verification mechanics and fail-closed disk write controls
11	🔤 Encoding, Mojibake & Format Conversion	Lossless UTF-8 normalization, BOM stripping, German umlauts, and format transformations
12	💻 Multi-OS Support & Windows Path Robustness	Deterministic path handling across Windows CRLF, Linux LF, and macOS runtimes
13	🌐 ellmos MCP Family & Sibling Matrix	9 sibling MCP servers spanning 200+ specialized agent tools
14	🧱 Ecosystem & Partner Suites	Integration with open-bricks desktop suites, BACH text OS, and dev-bricks tools
15	🔒 Security Policy & Incident Reporting	Bilingual security policy, private vulnerability disclosure, 48h response SLA
16	📋 Machine-Readable Context (llms.txt)	Standardized LLM index for agent discovery and RAG crawlers
17	🧪 Verification & Automated Tests	178 Vitest tests, 100% green parity, Multi-OS CI matrix across Node.js 20, 22, 24
18	⚖️ Third-Party Licenses & Transparency	100% permissive Level 1 SBOM, NOTICE attribution, and statutory § 521 BGB disclaimer

Target Personas & Discoverability

Persona	Core Needs	Pain Points Solved	Target Discovery Terms
Autonomous AI Agents & Swarms	Non-destructive file repair, preview-first dry-runs, deterministic status receipts	Malformed JSON halting agent loops, unhandled encoding Mojibake corrupting project files	`mcp json repair tool`, `local-first mcp file utilities`, `dry-run safe agent tools`
Full-Stack Developers	Fast multi-format config conversions (JSON/YAML/TOML/XML), regex mass renaming	Cumbersome multi-tool CLI syntax, tedious regex loops, Windows CRLF / BOM pollution	`json to toml mcp`, `yaml xml conversion tool`, `batch regex rename mcp`
DevOps & Release Engineers	Automated multi-hash checksums (SHA-256/SHA-512), folder diffs, ZIP inspection	CI runner tool drift, unverified package hashes, bloated external archive utilities	`mcp sha256 checksum`, `folder diff mcp tool`, `zip archive mcp runner`
Security & Compliance Officers	100% local-first air-gapped stdio execution, zero telemetry, audited permissive licenses	Hidden phone-home telemetry, unknown supply-chain licenses, uncontrolled network egress	`zero-egress mcp server`, `local-first claude mcp`, `permissive license mcp tools`

Comparative Matrix & Alternatives

Dimension	ellmos-clatcher-mcp	Standard Agent Shell	Ad-Hoc CLI (jq/sed)	Heavy Desktop Apps	Cloud Converters / APIs
Primary Interface	Native MCP Stdio (JSON-RPC)	Raw Shell / Bash Exec	Standalone Terminal CLI	GUI Application Window	HTTP REST / Web Page
Safety Guardrails	Built-in `dry_run: true` Default	Blind Overwrite Risk	Unchecked Shell Writes	Manual Confirmation GUI	Remote Server Storage
Data Privacy & Egress	100% Local-First / Zero-Egress	Local Execution	Local Execution	Local Execution	Remote Cloud Upload
JSON Auto-Repair	Heuristic 6-Rule Repair	Re-generate Full File	Complex JQ Scripting	Manual Syntax Editing	Third-Party Web Paste
Encoding Normalization	Lossless Mojibake Fix	Guesswork / iconv	iconv / enca CLI	Manual File Encoding Chg	Inconsistent Web UTF-8
Multi-Format Conversion	JSON/YAML/TOML/XML/CSV/INI	Prompt Re-writing	Separate CLI Packages	Complex File Exports	Rate-Limited Cloud API
Duplicate Detection	SHA-256 Hash Clustering	None (Custom Script)	Custom bash / find	Standalone Tool (Anti-D)	Not Supported
Batch Regex Renaming	Dry-Run Staged Renamer	Sequential 'mv' loop	rename / sed Scripts	Bulk Rename GUI Utility	Not Supported
Multi-OS Parity	Windows, Linux, macOS	Shell Syntax Quirks	Linux-centric Toolsets	OS-Specific Binaries	Browser-Dependent
License & Audited Security	100% Permissive MIT / BSD	Variable / Unaudited	GPL / Mixed Toolchains	Mixed / Proprietary	Closed Commercial SaaS

System Architecture & Data Flow

ASCII Four-View Architectural Topology

+--------------------------------------------------------------------------------------------------+

| ELLMOS CLATCHER MCP ARCHITECTURAL TOPOLOGY | +--------------------------------------------------------------------------------------------------+ | [VIEW 1: CALLER RUNTIMES & AGENT CLIENTS] | | * Autonomous Agents : Claude Code, OpenAI Codex, Antigravity / Gemini, Kimi, Cursor | | * Agent Frameworks : AutoGen, CrewAI, LangChain, LlamaIndex, Custom Python / TS Clients | | * Transport Protocols : Model Context Protocol (MCP stdio), JSON-RPC 2.0 Framing | | * Tool Surface : 12 Specialized Agent Tools (file repair, formatting, hash & archives) | | * Schema Contract : Stdio transport, dynamic runtime Zod schema validation & parameter guards| +--------------------------------------------------------------------------------------------------+ | | | | v | +--------------------------------------------------------------------------------------------------+ | [VIEW 2: CLATCHER MCP CORE ENGINE & TOOL DISPATCH ORCHESTRAT

Only the beginning is shown; read the rest in the repo

Ellmos Clatcher MCP

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

Which apps can use it

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Developer toolsi

Common questions

Alternatives

REA

Netdata

Front-End Checklist

README from the maker

ellmos-clatcher-mcp

Highlights & Value Proposition

🧭 Quick Navigation

Target Personas & Discoverability

Comparative Matrix & Alternatives

System Architecture & Data Flow

ASCII Four-View Architectural Topology