Rosetta MCP

Name: Rosetta MCP
Author: ewalid

by ewalidversion 0.1.1i★ –iRuns on your computer

Registry nameio.github.ewalid/rosetta-mcp

Install

Overview

Description from the maker (original English)

AI-powered Excel translation preserving formatting, formulas, and data integrity.

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 checksi1 of 1 passedChecked from public information; code not scanned yet
UsageiNot measured yet★ –

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: Docs, sheets & office work
You need to fill in: ANTHROPIC_API_KEY

Install

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

Before you install

Basic checks: 1 of 1 passed
Runs on your computer with your user’s permissions (files, network, apps).
You fill in yourself: ANTHROPIC_API_KEY

Values marked secret are keys to your account. Never share them or paste them into a chat.

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": {
    "rosetta": {
      "command": "npx",
      "args": [
        "-y",
        "@ewalid/rosetta-mcp"
      ],
      "env": {
        "ANTHROPIC_API_KEY": "your-value"
      }
    }
  }
}

Run this in your terminal

claude mcp add rosetta --env ANTHROPIC_API_KEY=your-value -- npx -y @ewalid/rosetta-mcp

Fill in the empty values before running it.

Open in Cursor

Or copy the settings yourself

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

{
  "mcpServers": {
    "rosetta": {
      "command": "npx",
      "args": [
        "-y",
        "@ewalid/rosetta-mcp"
      ],
      "env": {
        "ANTHROPIC_API_KEY": "your-value"
      }
    }
  }
}

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": {
    "rosetta": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@ewalid/rosetta-mcp"
      ],
      "env": {
        "ANTHROPIC_API_KEY": "your-value"
      }
    }
  }
}

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.

Values you fill in

ANTHROPIC_API_KEY secret required env
Your Anthropic API key from console.anthropic.com. Required to perform translations using Claude AI.

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

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 6, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account ewalid, which owns the repo
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… 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 Docs, sheets & office worki

More stars than 0% of the other 2178 servers in this category
Published to the registry more recently than 2% of the other 2178 servers in this category
Basic checks equal to or better than 100% of the other 2178 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 Rosetta MCP safe?

It passed 1 of 1 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?

You need to fill in: ANTHROPIC_API_KEY

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 –, and the latest version (0.1.1) reached the registry 10 months 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: Agent-Native Calendar, Excel MCP Server, MCP Server for Excel

Alternatives

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

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

Agent-Native Calendar

by BuilderIO

Agent-Native Google Calendar - manage events, sync, and public booking

Runs in the cloud★ 7,620MITUpdated 2 months ago

Install

Excel MCP Server

by haris-musa

Lets AI create and edit Excel files itself, including formulas, charts and PivotTables, without Excel installed.

Runs on your computer★ 4,276MITUpdated 6 days ago

Install

MCP Server for Excel

by sbroenne

Excel automation for AI - Sheets, Power Query, DAX, VBA, Tables, Ranges and more. Windows only.

Runs on your computer★ 847MITUpdated 3 days ago

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.

Rosetta

AI-powered Excel translation CLI. Translates Excel files while preserving formatting, formulas, and data integrity.

What it does

Rosetta translates all text in your Excel files using Claude AI, without breaking:

Formulas and calculations
Formatting (fonts, colors, borders)
Merged cells and layouts
Charts and images
Dropdown menus
Rich text (bold, italic within cells)

Prerequisites

You need a Claude API key from Anthropic.

Go to console.anthropic.com
Create an account (or sign in)
Go to API Keys and create a new key
Copy the key (starts with sk-ant-...)

Note: API usage is billed by Anthropic. See anthropic.com/pricing for current rates. Translating a typical Excel file costs a few cents.

Installation

Install from PyPI:

pip install rosetta-xl

Then set your API key:

# Linux/macOS

export ANTHROPIC_API_KEY=sk-ant-your-key-here

Windows (Command Prompt)

set ANTHROPIC_API_KEY=sk-ant-your-key-here

Windows (PowerShell)

$env:ANTHROPIC_API_KEY="sk-ant-your-key-here"

Or create a .env file in your working directory:

ANTHROPIC_API_KEY=sk-ant-your-key-here

Usage

# Translate to French

rosetta input.xlsx -t french

Translate to Spanish with custom output name

rosetta input.xlsx -t spanish -o translated.xlsx

Specify source language (auto-detected by default)

rosetta input.xlsx -s english -t german

Translate only specific sheets

rosetta input.xlsx -t french --sheets "Sheet1" --sheets "Data"

Add context for better translations (e.g., domain-specific terms)

rosetta input.xlsx -t french -c "Medical terminology document"

Options

Option	Short	Description
`--target-lang`	`-t`	Target language (required)
`--source-lang`	`-s`	Source language (auto-detect if omitted)
`--output`	`-o`	Output file path (default: `input_translated.xlsx`)
`--sheets`		Sheets to translate (can repeat, default: all)
`--context`	`-c`	Domain context for better accuracy
`--batch-size`	`-b`	Cells per API call (default: 50)

Examples

Translate a price list to multiple languages:

rosetta prices.xlsx -t french -o prices_fr.xlsx

rosetta prices.xlsx -t german -o prices_de.xlsx rosetta prices.xlsx -t spanish -o prices_es.xlsx

Translate a medical form with context:

rosetta patient_form.xlsx -t french -c "Medical intake form with clinical terminology"

Translate only the "Questions" sheet:

rosetta survey.xlsx -t japanese --sheets "Questions"

Troubleshooting

"ANTHROPIC_API_KEY not set"

Make sure you've exported the key: export ANTHROPIC_API_KEY=sk-ant-...
Or create a .env file with the key

"Invalid API key"

Check that your key starts with sk-ant-
Make sure you copied the full key from console.anthropic.com

"Rate limit exceeded"

You've hit Anthropic's rate limits. Wait a minute and try again
Or reduce batch size: rosetta input.xlsx -t french -b 20

How it works

Extracts all text cells from your Excel file
Sends text to Claude AI for translation (in batches)
Writes translations back, preserving all formatting
Saves the translated file

Your original file is never modified.

Web App & API

Rosetta also includes a web application and REST API for browser-based translations.

Running the API server

# Install with uv (recommended)

uv sync

Start the server

uv run uvicorn rosetta.api:app --reload

Or with pip

pip install -e . uvicorn rosetta.api:app --reload

The API runs at http://localhost:8000 by default.

Running the frontend

cd frontend

npm install npm run dev

The frontend runs at http://localhost:5173 and connects to the API.

API Endpoints

Endpoint	Method	Description
`/translate`	POST	Translate an Excel file (returns file)
`/translate-stream`	POST	Translate with real-time progress via SSE
`/estimate`	POST	Get cell count and cost estimate
`/sheets`	POST	List sheet names in a file
`/count`	POST	Count translatable cells
`/preview`	POST	Preview cells that will be translated
`/health`	GET	Health check

Real-time Progress

The /translate-stream endpoint uses Server-Sent Events (SSE) to stream translation progress in real-time. The frontend automatically falls back to the standard /translate endpoint on networks that don't support SSE (e.g., corporate proxies).

MCP Integration

Rosetta includes MCP (Model Context Protocol) servers for both Claude Desktop and Claude Web.

For Claude Desktop (Local)

Add to your Claude Desktop config (~/Library/Application Support/Claude/claude_desktop_config.json):

"mcpServers": { "rosetta": { "command": "uv", "args": ["run", "--directory", "/path/to/rosetta", "python", "-m", "rosetta.api.mcp"], "env": { "ANTHROPIC_API_KEY": "your-key-here" } } } }

Usage: Use local file paths for best results.

Translate ~/Downloads/report.xlsx to French

For Claude Web (Browser)

Note: Claude.ai does not yet support custom MCP servers in the browser (as of January 2026).

Current recommendation: Use the web app for browser-based translations.

See MCP_USAGE.md for detailed instructions.

Requirements

Python 3.11+
Anthropic API key

License

MIT

Rosetta MCP

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

Values you fill in

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 Docs, sheets & office worki

Common questions

Alternatives

Agent-Native Calendar

Excel MCP Server

MCP Server for Excel

README from the maker

Rosetta

What it does

Prerequisites

Installation

Windows (Command Prompt)

Windows (PowerShell)

Usage

Translate to Spanish with custom output name

Specify source language (auto-detected by default)

Translate only specific sheets

Add context for better translations (e.g., domain-specific terms)

Options

Examples

Troubleshooting

How it works

Web App & API

Running the API server

Start the server

Or with pip

Running the frontend

API Endpoints

Real-time Progress

MCP Integration

For Claude Desktop (Local)

For Claude Web (Browser)

Requirements

License